diff options
Diffstat (limited to 'docs/sqlglot/optimizer')
| -rw-r--r-- | docs/sqlglot/optimizer/eliminate_ctes.html | 86 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/eliminate_subqueries.html | 428 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/isolate_table_selects.html | 4 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/merge_subqueries.html | 439 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/normalize.html | 428 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/optimize_joins.html | 292 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/optimizer.html | 244 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/pushdown_predicates.html | 662 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/pushdown_projections.html | 224 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/qualify_columns.html | 1515 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/qualify_tables.html | 309 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/scope.html | 2631 | ||||
| -rw-r--r-- | docs/sqlglot/optimizer/simplify.html | 1600 |
13 files changed, 4521 insertions, 4341 deletions
diff --git a/docs/sqlglot/optimizer/eliminate_ctes.html b/docs/sqlglot/optimizer/eliminate_ctes.html index 3b66f78..afa0f09 100644 --- a/docs/sqlglot/optimizer/eliminate_ctes.html +++ b/docs/sqlglot/optimizer/eliminate_ctes.html @@ -77,27 +77,28 @@ </span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="sd"> """</span> </span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> </span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a> -</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> <span class="n">ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a> -</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="c1"># Traverse the scope tree in reverse so we can remove chains of unused CTEs</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> <span class="n">count</span> <span class="o">=</span> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">scope</span><span class="p">)]</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="k">if</span> <span class="n">count</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="n">cte_node</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="n">with_node</span> <span class="o">=</span> <span class="n">cte_node</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="n">cte_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> -</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="c1"># Pop the entire WITH clause if this is the last CTE</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_node</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">with_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> -</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="c1"># Decrement the ref count for all sources this CTE selects from</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">-=</span> <span class="mi">1</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> -</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a> <span class="n">ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> +</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> <span class="c1"># Traverse the scope tree in reverse so we can remove chains of unused CTEs</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">count</span> <span class="o">=</span> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">scope</span><span class="p">)]</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="k">if</span> <span class="n">count</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="n">cte_node</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="n">with_node</span> <span class="o">=</span> <span class="n">cte_node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="n">cte_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> +</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="c1"># Pop the entire WITH clause if this is the last CTE</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_node</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="n">with_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> +</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="c1"># Decrement the ref count for all sources this CTE selects from</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">-=</span> <span class="mi">1</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> +</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -131,27 +132,28 @@ </span><span id="eliminate_ctes-20"><a href="#eliminate_ctes-20"><span class="linenos">20</span></a><span class="sd"> """</span> </span><span id="eliminate_ctes-21"><a href="#eliminate_ctes-21"><span class="linenos">21</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> </span><span id="eliminate_ctes-22"><a href="#eliminate_ctes-22"><span class="linenos">22</span></a> -</span><span id="eliminate_ctes-23"><a href="#eliminate_ctes-23"><span class="linenos">23</span></a> <span class="n">ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> -</span><span id="eliminate_ctes-24"><a href="#eliminate_ctes-24"><span class="linenos">24</span></a> -</span><span id="eliminate_ctes-25"><a href="#eliminate_ctes-25"><span class="linenos">25</span></a> <span class="c1"># Traverse the scope tree in reverse so we can remove chains of unused CTEs</span> -</span><span id="eliminate_ctes-26"><a href="#eliminate_ctes-26"><span class="linenos">26</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> -</span><span id="eliminate_ctes-27"><a href="#eliminate_ctes-27"><span class="linenos">27</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="eliminate_ctes-28"><a href="#eliminate_ctes-28"><span class="linenos">28</span></a> <span class="n">count</span> <span class="o">=</span> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">scope</span><span class="p">)]</span> -</span><span id="eliminate_ctes-29"><a href="#eliminate_ctes-29"><span class="linenos">29</span></a> <span class="k">if</span> <span class="n">count</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> -</span><span id="eliminate_ctes-30"><a href="#eliminate_ctes-30"><span class="linenos">30</span></a> <span class="n">cte_node</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="eliminate_ctes-31"><a href="#eliminate_ctes-31"><span class="linenos">31</span></a> <span class="n">with_node</span> <span class="o">=</span> <span class="n">cte_node</span><span class="o">.</span><span class="n">parent</span> -</span><span id="eliminate_ctes-32"><a href="#eliminate_ctes-32"><span class="linenos">32</span></a> <span class="n">cte_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="eliminate_ctes-33"><a href="#eliminate_ctes-33"><span class="linenos">33</span></a> -</span><span id="eliminate_ctes-34"><a href="#eliminate_ctes-34"><span class="linenos">34</span></a> <span class="c1"># Pop the entire WITH clause if this is the last CTE</span> -</span><span id="eliminate_ctes-35"><a href="#eliminate_ctes-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_node</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> -</span><span id="eliminate_ctes-36"><a href="#eliminate_ctes-36"><span class="linenos">36</span></a> <span class="n">with_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="eliminate_ctes-37"><a href="#eliminate_ctes-37"><span class="linenos">37</span></a> -</span><span id="eliminate_ctes-38"><a href="#eliminate_ctes-38"><span class="linenos">38</span></a> <span class="c1"># Decrement the ref count for all sources this CTE selects from</span> -</span><span id="eliminate_ctes-39"><a href="#eliminate_ctes-39"><span class="linenos">39</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="eliminate_ctes-40"><a href="#eliminate_ctes-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> -</span><span id="eliminate_ctes-41"><a href="#eliminate_ctes-41"><span class="linenos">41</span></a> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">-=</span> <span class="mi">1</span> -</span><span id="eliminate_ctes-42"><a href="#eliminate_ctes-42"><span class="linenos">42</span></a> -</span><span id="eliminate_ctes-43"><a href="#eliminate_ctes-43"><span class="linenos">43</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="eliminate_ctes-23"><a href="#eliminate_ctes-23"><span class="linenos">23</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="eliminate_ctes-24"><a href="#eliminate_ctes-24"><span class="linenos">24</span></a> <span class="n">ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> +</span><span id="eliminate_ctes-25"><a href="#eliminate_ctes-25"><span class="linenos">25</span></a> +</span><span id="eliminate_ctes-26"><a href="#eliminate_ctes-26"><span class="linenos">26</span></a> <span class="c1"># Traverse the scope tree in reverse so we can remove chains of unused CTEs</span> +</span><span id="eliminate_ctes-27"><a href="#eliminate_ctes-27"><span class="linenos">27</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> +</span><span id="eliminate_ctes-28"><a href="#eliminate_ctes-28"><span class="linenos">28</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="eliminate_ctes-29"><a href="#eliminate_ctes-29"><span class="linenos">29</span></a> <span class="n">count</span> <span class="o">=</span> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">scope</span><span class="p">)]</span> +</span><span id="eliminate_ctes-30"><a href="#eliminate_ctes-30"><span class="linenos">30</span></a> <span class="k">if</span> <span class="n">count</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="eliminate_ctes-31"><a href="#eliminate_ctes-31"><span class="linenos">31</span></a> <span class="n">cte_node</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="eliminate_ctes-32"><a href="#eliminate_ctes-32"><span class="linenos">32</span></a> <span class="n">with_node</span> <span class="o">=</span> <span class="n">cte_node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="eliminate_ctes-33"><a href="#eliminate_ctes-33"><span class="linenos">33</span></a> <span class="n">cte_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="eliminate_ctes-34"><a href="#eliminate_ctes-34"><span class="linenos">34</span></a> +</span><span id="eliminate_ctes-35"><a href="#eliminate_ctes-35"><span class="linenos">35</span></a> <span class="c1"># Pop the entire WITH clause if this is the last CTE</span> +</span><span id="eliminate_ctes-36"><a href="#eliminate_ctes-36"><span class="linenos">36</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_node</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> +</span><span id="eliminate_ctes-37"><a href="#eliminate_ctes-37"><span class="linenos">37</span></a> <span class="n">with_node</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="eliminate_ctes-38"><a href="#eliminate_ctes-38"><span class="linenos">38</span></a> +</span><span id="eliminate_ctes-39"><a href="#eliminate_ctes-39"><span class="linenos">39</span></a> <span class="c1"># Decrement the ref count for all sources this CTE selects from</span> +</span><span id="eliminate_ctes-40"><a href="#eliminate_ctes-40"><span class="linenos">40</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="eliminate_ctes-41"><a href="#eliminate_ctes-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> +</span><span id="eliminate_ctes-42"><a href="#eliminate_ctes-42"><span class="linenos">42</span></a> <span class="n">ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">-=</span> <span class="mi">1</span> +</span><span id="eliminate_ctes-43"><a href="#eliminate_ctes-43"><span class="linenos">43</span></a> +</span><span id="eliminate_ctes-44"><a href="#eliminate_ctes-44"><span class="linenos">44</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/eliminate_subqueries.html b/docs/sqlglot/optimizer/eliminate_subqueries.html index 9bae349..3b25367 100644 --- a/docs/sqlglot/optimizer/eliminate_subqueries.html +++ b/docs/sqlglot/optimizer/eliminate_subqueries.html @@ -74,9 +74,9 @@ </span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y'</span> </span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> </span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> This also deduplicates common subqueries:</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT * FROM x) AS y JOIN (SELECT * FROM x) AS z")</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT * FROM x) AS y CROSS JOIN (SELECT * FROM x) AS z")</span> </span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> >>> eliminate_subqueries(expression).sql()</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y JOIN y AS z'</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y CROSS JOIN y AS z'</span> </span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> </span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> Args:</span> </span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> expression (sqlglot.Expression): expression</span> @@ -90,163 +90,172 @@ </span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> </span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> </span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="c1"># Map of alias->Scope|Table</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="c1"># These are all aliases that are already used in the expression.</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="c1"># We don't want to create new CTEs that conflict with these names.</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="c1"># All CTE aliases in the root scope are taken</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="c1"># All table names are taken</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">update</span><span class="p">(</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="p">{</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">source</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">source</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="p">}</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="p">)</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="c1"># Map of Expression->alias</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="c1"># Existing CTES in the root expression. We'll use this for deduplication.</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">existing_ctes</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="n">with_</span><span class="p">:</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="n">with_</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">)</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">]</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">new_ctes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="c1"># We're adding more CTEs, but we want to maintain the DAG order.</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="c1"># Derived tables within an existing CTE need to come before the existing CTE.</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">for</span> <span class="n">cte_scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="c1"># Append all the new CTEs from this existing CTE</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">cte_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">if</span> <span class="n">scope</span> <span class="ow">is</span> <span class="n">cte_scope</span><span class="p">:</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="c1"># Don't try to eliminate this CTE itself</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">continue</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="c1"># Append the existing CTE itself</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="c1"># Map of alias->Scope|Table</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="c1"># These are all aliases that are already used in the expression.</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="c1"># We don't want to create new CTEs that conflict with these names.</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="c1"># All CTE aliases in the root scope are taken</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="c1"># All table names are taken</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">update</span><span class="p">(</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="p">{</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">source</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">source</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="p">}</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="p">)</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="c1"># Map of Expression->alias</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="c1"># Existing CTES in the root expression. We'll use this for deduplication.</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">existing_ctes</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">if</span> <span class="n">with_</span><span class="p">:</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="n">with_</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">)</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">]</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">new_ctes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="c1"># We're adding more CTEs, but we want to maintain the DAG order.</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="c1"># Derived tables within an existing CTE need to come before the existing CTE.</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">for</span> <span class="n">cte_scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="c1"># Append all the new CTEs from this existing CTE</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">cte_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">if</span> <span class="n">scope</span> <span class="ow">is</span> <span class="n">cte_scope</span><span class="p">:</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="c1"># Don't try to eliminate this CTE itself</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">continue</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> </span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="c1"># Now append the rest</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="c1"># Append the existing CTE itself</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="c1"># Now append the rest</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> </span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> </span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a><span class="k">def</span> <span class="nf">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_union</span><span class="p">:</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">return</span> <span class="n">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_derived_table</span><span class="p">:</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">return</span> <span class="n">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a><span class="k">def</span> <span class="nf">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_union</span><span class="p">:</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">return</span> <span class="n">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> </span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="n">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_derived_table</span><span class="p">:</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="n">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> </span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a><span class="k">def</span> <span class="nf">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="k">return</span> <span class="n">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> </span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> <span class="ow">or</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="c1"># Try to maintain the selections</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expressions</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="p">]</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="c1"># If not all selections have an alias, just select *</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">selects</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">expressions</span><span class="p">):</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"*"</span><span class="p">]</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)))</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">alias</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias</span><span class="p">)),</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="p">)</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a><span class="k">def</span> <span class="nf">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a><span class="k">def</span> <span class="nf">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> <span class="ow">or</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="c1"># Try to maintain the selections</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expressions</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="p">]</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="c1"># If not all selections have an alias, just select *</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">selects</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">expressions</span><span class="p">):</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"*"</span><span class="p">]</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="p">)</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">alias</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias</span><span class="p">)),</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="p">)</span> </span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="n">cte</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a><span class="k">def</span> <span class="nf">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="c1"># This ensures we don't drop the "pivot" arg from a pivoted subquery</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="kc">None</span> </span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="k">def</span> <span class="nf">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="n">cte</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> </span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="c1"># Rename references to this CTE</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">if</span> <span class="n">source</span> <span class="ow">is</span> <span class="n">scope</span><span class="p">:</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">new_table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">table</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_table</span><span class="p">)</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">return</span> <span class="n">cte</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a><span class="k">def</span> <span class="nf">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> </span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a><span class="k">def</span> <span class="nf">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a><span class="sd"> Returns:</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a><span class="sd"> tuple of (name, cte)</span> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a><span class="sd"> where `name` is a new name for this CTE in the root scope and `cte` is a new CTE instance.</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a><span class="sd"> If this CTE duplicates an existing CTE, `cte` will be None.</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="sd"> """</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">name</span><span class="p">:</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="k">if</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="k">elif</span> <span class="n">taken</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">name</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="p">)</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">return</span> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="c1"># Rename references to this CTE</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="k">if</span> <span class="n">source</span> <span class="ow">is</span> <span class="n">scope</span><span class="p">:</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="n">new_table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">table</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_table</span><span class="p">)</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="k">return</span> <span class="n">cte</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="k">def</span> <span class="nf">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a><span class="sd"> Returns:</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a><span class="sd"> tuple of (name, cte)</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a><span class="sd"> where `name` is a new name for this CTE in the root scope and `cte` is a new CTE instance.</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a><span class="sd"> If this CTE duplicates an existing CTE, `cte` will be None.</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a><span class="sd"> """</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">name</span><span class="p">:</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">if</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">elif</span> <span class="n">taken</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">name</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="p">)</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="k">return</span> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> </span></pre></div> @@ -273,9 +282,9 @@ </span><span id="eliminate_subqueries-17"><a href="#eliminate_subqueries-17"><span class="linenos">17</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y'</span> </span><span id="eliminate_subqueries-18"><a href="#eliminate_subqueries-18"><span class="linenos">18</span></a> </span><span id="eliminate_subqueries-19"><a href="#eliminate_subqueries-19"><span class="linenos">19</span></a><span class="sd"> This also deduplicates common subqueries:</span> -</span><span id="eliminate_subqueries-20"><a href="#eliminate_subqueries-20"><span class="linenos">20</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT * FROM x) AS y JOIN (SELECT * FROM x) AS z")</span> +</span><span id="eliminate_subqueries-20"><a href="#eliminate_subqueries-20"><span class="linenos">20</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT * FROM x) AS y CROSS JOIN (SELECT * FROM x) AS z")</span> </span><span id="eliminate_subqueries-21"><a href="#eliminate_subqueries-21"><span class="linenos">21</span></a><span class="sd"> >>> eliminate_subqueries(expression).sql()</span> -</span><span id="eliminate_subqueries-22"><a href="#eliminate_subqueries-22"><span class="linenos">22</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y JOIN y AS z'</span> +</span><span id="eliminate_subqueries-22"><a href="#eliminate_subqueries-22"><span class="linenos">22</span></a><span class="sd"> 'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y CROSS JOIN y AS z'</span> </span><span id="eliminate_subqueries-23"><a href="#eliminate_subqueries-23"><span class="linenos">23</span></a> </span><span id="eliminate_subqueries-24"><a href="#eliminate_subqueries-24"><span class="linenos">24</span></a><span class="sd"> Args:</span> </span><span id="eliminate_subqueries-25"><a href="#eliminate_subqueries-25"><span class="linenos">25</span></a><span class="sd"> expression (sqlglot.Expression): expression</span> @@ -289,63 +298,66 @@ </span><span id="eliminate_subqueries-33"><a href="#eliminate_subqueries-33"><span class="linenos">33</span></a> </span><span id="eliminate_subqueries-34"><a href="#eliminate_subqueries-34"><span class="linenos">34</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> </span><span id="eliminate_subqueries-35"><a href="#eliminate_subqueries-35"><span class="linenos">35</span></a> -</span><span id="eliminate_subqueries-36"><a href="#eliminate_subqueries-36"><span class="linenos">36</span></a> <span class="c1"># Map of alias->Scope|Table</span> -</span><span id="eliminate_subqueries-37"><a href="#eliminate_subqueries-37"><span class="linenos">37</span></a> <span class="c1"># These are all aliases that are already used in the expression.</span> -</span><span id="eliminate_subqueries-38"><a href="#eliminate_subqueries-38"><span class="linenos">38</span></a> <span class="c1"># We don't want to create new CTEs that conflict with these names.</span> -</span><span id="eliminate_subqueries-39"><a href="#eliminate_subqueries-39"><span class="linenos">39</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="eliminate_subqueries-40"><a href="#eliminate_subqueries-40"><span class="linenos">40</span></a> -</span><span id="eliminate_subqueries-41"><a href="#eliminate_subqueries-41"><span class="linenos">41</span></a> <span class="c1"># All CTE aliases in the root scope are taken</span> -</span><span id="eliminate_subqueries-42"><a href="#eliminate_subqueries-42"><span class="linenos">42</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> -</span><span id="eliminate_subqueries-43"><a href="#eliminate_subqueries-43"><span class="linenos">43</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="eliminate_subqueries-44"><a href="#eliminate_subqueries-44"><span class="linenos">44</span></a> -</span><span id="eliminate_subqueries-45"><a href="#eliminate_subqueries-45"><span class="linenos">45</span></a> <span class="c1"># All table names are taken</span> -</span><span id="eliminate_subqueries-46"><a href="#eliminate_subqueries-46"><span class="linenos">46</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="eliminate_subqueries-47"><a href="#eliminate_subqueries-47"><span class="linenos">47</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">update</span><span class="p">(</span> -</span><span id="eliminate_subqueries-48"><a href="#eliminate_subqueries-48"><span class="linenos">48</span></a> <span class="p">{</span> -</span><span id="eliminate_subqueries-49"><a href="#eliminate_subqueries-49"><span class="linenos">49</span></a> <span class="n">source</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">source</span> -</span><span id="eliminate_subqueries-50"><a href="#eliminate_subqueries-50"><span class="linenos">50</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="eliminate_subqueries-51"><a href="#eliminate_subqueries-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> -</span><span id="eliminate_subqueries-52"><a href="#eliminate_subqueries-52"><span class="linenos">52</span></a> <span class="p">}</span> -</span><span id="eliminate_subqueries-53"><a href="#eliminate_subqueries-53"><span class="linenos">53</span></a> <span class="p">)</span> -</span><span id="eliminate_subqueries-54"><a href="#eliminate_subqueries-54"><span class="linenos">54</span></a> -</span><span id="eliminate_subqueries-55"><a href="#eliminate_subqueries-55"><span class="linenos">55</span></a> <span class="c1"># Map of Expression->alias</span> -</span><span id="eliminate_subqueries-56"><a href="#eliminate_subqueries-56"><span class="linenos">56</span></a> <span class="c1"># Existing CTES in the root expression. We'll use this for deduplication.</span> -</span><span id="eliminate_subqueries-57"><a href="#eliminate_subqueries-57"><span class="linenos">57</span></a> <span class="n">existing_ctes</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="eliminate_subqueries-58"><a href="#eliminate_subqueries-58"><span class="linenos">58</span></a> -</span><span id="eliminate_subqueries-59"><a href="#eliminate_subqueries-59"><span class="linenos">59</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> -</span><span id="eliminate_subqueries-60"><a href="#eliminate_subqueries-60"><span class="linenos">60</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="eliminate_subqueries-61"><a href="#eliminate_subqueries-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="n">with_</span><span class="p">:</span> -</span><span id="eliminate_subqueries-62"><a href="#eliminate_subqueries-62"><span class="linenos">62</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="n">with_</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">)</span> -</span><span id="eliminate_subqueries-63"><a href="#eliminate_subqueries-63"><span class="linenos">63</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="eliminate_subqueries-64"><a href="#eliminate_subqueries-64"><span class="linenos">64</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">]</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> -</span><span id="eliminate_subqueries-65"><a href="#eliminate_subqueries-65"><span class="linenos">65</span></a> <span class="n">new_ctes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="eliminate_subqueries-66"><a href="#eliminate_subqueries-66"><span class="linenos">66</span></a> -</span><span id="eliminate_subqueries-67"><a href="#eliminate_subqueries-67"><span class="linenos">67</span></a> <span class="c1"># We're adding more CTEs, but we want to maintain the DAG order.</span> -</span><span id="eliminate_subqueries-68"><a href="#eliminate_subqueries-68"><span class="linenos">68</span></a> <span class="c1"># Derived tables within an existing CTE need to come before the existing CTE.</span> -</span><span id="eliminate_subqueries-69"><a href="#eliminate_subqueries-69"><span class="linenos">69</span></a> <span class="k">for</span> <span class="n">cte_scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> -</span><span id="eliminate_subqueries-70"><a href="#eliminate_subqueries-70"><span class="linenos">70</span></a> <span class="c1"># Append all the new CTEs from this existing CTE</span> -</span><span id="eliminate_subqueries-71"><a href="#eliminate_subqueries-71"><span class="linenos">71</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">cte_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="eliminate_subqueries-72"><a href="#eliminate_subqueries-72"><span class="linenos">72</span></a> <span class="k">if</span> <span class="n">scope</span> <span class="ow">is</span> <span class="n">cte_scope</span><span class="p">:</span> -</span><span id="eliminate_subqueries-73"><a href="#eliminate_subqueries-73"><span class="linenos">73</span></a> <span class="c1"># Don't try to eliminate this CTE itself</span> -</span><span id="eliminate_subqueries-74"><a href="#eliminate_subqueries-74"><span class="linenos">74</span></a> <span class="k">continue</span> -</span><span id="eliminate_subqueries-75"><a href="#eliminate_subqueries-75"><span class="linenos">75</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="eliminate_subqueries-76"><a href="#eliminate_subqueries-76"><span class="linenos">76</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="eliminate_subqueries-77"><a href="#eliminate_subqueries-77"><span class="linenos">77</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="eliminate_subqueries-78"><a href="#eliminate_subqueries-78"><span class="linenos">78</span></a> -</span><span id="eliminate_subqueries-79"><a href="#eliminate_subqueries-79"><span class="linenos">79</span></a> <span class="c1"># Append the existing CTE itself</span> -</span><span id="eliminate_subqueries-80"><a href="#eliminate_subqueries-80"><span class="linenos">80</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> +</span><span id="eliminate_subqueries-36"><a href="#eliminate_subqueries-36"><span class="linenos">36</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">root</span><span class="p">:</span> +</span><span id="eliminate_subqueries-37"><a href="#eliminate_subqueries-37"><span class="linenos">37</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="eliminate_subqueries-38"><a href="#eliminate_subqueries-38"><span class="linenos">38</span></a> +</span><span id="eliminate_subqueries-39"><a href="#eliminate_subqueries-39"><span class="linenos">39</span></a> <span class="c1"># Map of alias->Scope|Table</span> +</span><span id="eliminate_subqueries-40"><a href="#eliminate_subqueries-40"><span class="linenos">40</span></a> <span class="c1"># These are all aliases that are already used in the expression.</span> +</span><span id="eliminate_subqueries-41"><a href="#eliminate_subqueries-41"><span class="linenos">41</span></a> <span class="c1"># We don't want to create new CTEs that conflict with these names.</span> +</span><span id="eliminate_subqueries-42"><a href="#eliminate_subqueries-42"><span class="linenos">42</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="eliminate_subqueries-43"><a href="#eliminate_subqueries-43"><span class="linenos">43</span></a> +</span><span id="eliminate_subqueries-44"><a href="#eliminate_subqueries-44"><span class="linenos">44</span></a> <span class="c1"># All CTE aliases in the root scope are taken</span> +</span><span id="eliminate_subqueries-45"><a href="#eliminate_subqueries-45"><span class="linenos">45</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> +</span><span id="eliminate_subqueries-46"><a href="#eliminate_subqueries-46"><span class="linenos">46</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="eliminate_subqueries-47"><a href="#eliminate_subqueries-47"><span class="linenos">47</span></a> +</span><span id="eliminate_subqueries-48"><a href="#eliminate_subqueries-48"><span class="linenos">48</span></a> <span class="c1"># All table names are taken</span> +</span><span id="eliminate_subqueries-49"><a href="#eliminate_subqueries-49"><span class="linenos">49</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="eliminate_subqueries-50"><a href="#eliminate_subqueries-50"><span class="linenos">50</span></a> <span class="n">taken</span><span class="o">.</span><span class="n">update</span><span class="p">(</span> +</span><span id="eliminate_subqueries-51"><a href="#eliminate_subqueries-51"><span class="linenos">51</span></a> <span class="p">{</span> +</span><span id="eliminate_subqueries-52"><a href="#eliminate_subqueries-52"><span class="linenos">52</span></a> <span class="n">source</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">source</span> +</span><span id="eliminate_subqueries-53"><a href="#eliminate_subqueries-53"><span class="linenos">53</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="eliminate_subqueries-54"><a href="#eliminate_subqueries-54"><span class="linenos">54</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> +</span><span id="eliminate_subqueries-55"><a href="#eliminate_subqueries-55"><span class="linenos">55</span></a> <span class="p">}</span> +</span><span id="eliminate_subqueries-56"><a href="#eliminate_subqueries-56"><span class="linenos">56</span></a> <span class="p">)</span> +</span><span id="eliminate_subqueries-57"><a href="#eliminate_subqueries-57"><span class="linenos">57</span></a> +</span><span id="eliminate_subqueries-58"><a href="#eliminate_subqueries-58"><span class="linenos">58</span></a> <span class="c1"># Map of Expression->alias</span> +</span><span id="eliminate_subqueries-59"><a href="#eliminate_subqueries-59"><span class="linenos">59</span></a> <span class="c1"># Existing CTES in the root expression. We'll use this for deduplication.</span> +</span><span id="eliminate_subqueries-60"><a href="#eliminate_subqueries-60"><span class="linenos">60</span></a> <span class="n">existing_ctes</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="eliminate_subqueries-61"><a href="#eliminate_subqueries-61"><span class="linenos">61</span></a> +</span><span id="eliminate_subqueries-62"><a href="#eliminate_subqueries-62"><span class="linenos">62</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="eliminate_subqueries-63"><a href="#eliminate_subqueries-63"><span class="linenos">63</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="eliminate_subqueries-64"><a href="#eliminate_subqueries-64"><span class="linenos">64</span></a> <span class="k">if</span> <span class="n">with_</span><span class="p">:</span> +</span><span id="eliminate_subqueries-65"><a href="#eliminate_subqueries-65"><span class="linenos">65</span></a> <span class="n">recursive</span> <span class="o">=</span> <span class="n">with_</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"recursive"</span><span class="p">)</span> +</span><span id="eliminate_subqueries-66"><a href="#eliminate_subqueries-66"><span class="linenos">66</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="eliminate_subqueries-67"><a href="#eliminate_subqueries-67"><span class="linenos">67</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">]</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> +</span><span id="eliminate_subqueries-68"><a href="#eliminate_subqueries-68"><span class="linenos">68</span></a> <span class="n">new_ctes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="eliminate_subqueries-69"><a href="#eliminate_subqueries-69"><span class="linenos">69</span></a> +</span><span id="eliminate_subqueries-70"><a href="#eliminate_subqueries-70"><span class="linenos">70</span></a> <span class="c1"># We're adding more CTEs, but we want to maintain the DAG order.</span> +</span><span id="eliminate_subqueries-71"><a href="#eliminate_subqueries-71"><span class="linenos">71</span></a> <span class="c1"># Derived tables within an existing CTE need to come before the existing CTE.</span> +</span><span id="eliminate_subqueries-72"><a href="#eliminate_subqueries-72"><span class="linenos">72</span></a> <span class="k">for</span> <span class="n">cte_scope</span> <span class="ow">in</span> <span class="n">root</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">:</span> +</span><span id="eliminate_subqueries-73"><a href="#eliminate_subqueries-73"><span class="linenos">73</span></a> <span class="c1"># Append all the new CTEs from this existing CTE</span> +</span><span id="eliminate_subqueries-74"><a href="#eliminate_subqueries-74"><span class="linenos">74</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">cte_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="eliminate_subqueries-75"><a href="#eliminate_subqueries-75"><span class="linenos">75</span></a> <span class="k">if</span> <span class="n">scope</span> <span class="ow">is</span> <span class="n">cte_scope</span><span class="p">:</span> +</span><span id="eliminate_subqueries-76"><a href="#eliminate_subqueries-76"><span class="linenos">76</span></a> <span class="c1"># Don't try to eliminate this CTE itself</span> +</span><span id="eliminate_subqueries-77"><a href="#eliminate_subqueries-77"><span class="linenos">77</span></a> <span class="k">continue</span> +</span><span id="eliminate_subqueries-78"><a href="#eliminate_subqueries-78"><span class="linenos">78</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="eliminate_subqueries-79"><a href="#eliminate_subqueries-79"><span class="linenos">79</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="eliminate_subqueries-80"><a href="#eliminate_subqueries-80"><span class="linenos">80</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> </span><span id="eliminate_subqueries-81"><a href="#eliminate_subqueries-81"><span class="linenos">81</span></a> -</span><span id="eliminate_subqueries-82"><a href="#eliminate_subqueries-82"><span class="linenos">82</span></a> <span class="c1"># Now append the rest</span> -</span><span id="eliminate_subqueries-83"><a href="#eliminate_subqueries-83"><span class="linenos">83</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> -</span><span id="eliminate_subqueries-84"><a href="#eliminate_subqueries-84"><span class="linenos">84</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="eliminate_subqueries-85"><a href="#eliminate_subqueries-85"><span class="linenos">85</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="eliminate_subqueries-86"><a href="#eliminate_subqueries-86"><span class="linenos">86</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="eliminate_subqueries-87"><a href="#eliminate_subqueries-87"><span class="linenos">87</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="eliminate_subqueries-88"><a href="#eliminate_subqueries-88"><span class="linenos">88</span></a> -</span><span id="eliminate_subqueries-89"><a href="#eliminate_subqueries-89"><span class="linenos">89</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> -</span><span id="eliminate_subqueries-90"><a href="#eliminate_subqueries-90"><span class="linenos">90</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="eliminate_subqueries-82"><a href="#eliminate_subqueries-82"><span class="linenos">82</span></a> <span class="c1"># Append the existing CTE itself</span> +</span><span id="eliminate_subqueries-83"><a href="#eliminate_subqueries-83"><span class="linenos">83</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> +</span><span id="eliminate_subqueries-84"><a href="#eliminate_subqueries-84"><span class="linenos">84</span></a> +</span><span id="eliminate_subqueries-85"><a href="#eliminate_subqueries-85"><span class="linenos">85</span></a> <span class="c1"># Now append the rest</span> +</span><span id="eliminate_subqueries-86"><a href="#eliminate_subqueries-86"><span class="linenos">86</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> +</span><span id="eliminate_subqueries-87"><a href="#eliminate_subqueries-87"><span class="linenos">87</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="eliminate_subqueries-88"><a href="#eliminate_subqueries-88"><span class="linenos">88</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="eliminate_subqueries-89"><a href="#eliminate_subqueries-89"><span class="linenos">89</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="eliminate_subqueries-90"><a href="#eliminate_subqueries-90"><span class="linenos">90</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> </span><span id="eliminate_subqueries-91"><a href="#eliminate_subqueries-91"><span class="linenos">91</span></a> -</span><span id="eliminate_subqueries-92"><a href="#eliminate_subqueries-92"><span class="linenos">92</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="eliminate_subqueries-92"><a href="#eliminate_subqueries-92"><span class="linenos">92</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> +</span><span id="eliminate_subqueries-93"><a href="#eliminate_subqueries-93"><span class="linenos">93</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="eliminate_subqueries-94"><a href="#eliminate_subqueries-94"><span class="linenos">94</span></a> +</span><span id="eliminate_subqueries-95"><a href="#eliminate_subqueries-95"><span class="linenos">95</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -367,9 +379,9 @@ <blockquote> <div class="pdoc-code codehilite"> -<pre><span></span><code><span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a FROM (SELECT * FROM x) AS y JOIN (SELECT * FROM x) AS z"</span><span class="p">)</span> +<pre><span></span><code><span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a FROM (SELECT * FROM x) AS y CROSS JOIN (SELECT * FROM x) AS z"</span><span class="p">)</span> <span class="gp">>>> </span><span class="n">eliminate_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span> -<span class="go">'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y JOIN y AS z'</span> +<span class="go">'WITH y AS (SELECT * FROM x) SELECT a FROM y AS y CROSS JOIN y AS z'</span> </code></pre> </div> </blockquote> diff --git a/docs/sqlglot/optimizer/isolate_table_selects.html b/docs/sqlglot/optimizer/isolate_table_selects.html index ebf7895..a282222 100644 --- a/docs/sqlglot/optimizer/isolate_table_selects.html +++ b/docs/sqlglot/optimizer/isolate_table_selects.html @@ -79,7 +79,7 @@ </span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> </span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"*"</span><span class="p">)</span> </span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> </span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> </span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="p">)</span> </span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> <span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> @@ -118,7 +118,7 @@ </span><span id="isolate_table_selects-22"><a href="#isolate_table_selects-22"><span class="linenos">22</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> </span><span id="isolate_table_selects-23"><a href="#isolate_table_selects-23"><span class="linenos">23</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"*"</span><span class="p">)</span> </span><span id="isolate_table_selects-24"><a href="#isolate_table_selects-24"><span class="linenos">24</span></a> <span class="o">.</span><span class="n">from_</span><span class="p">(</span> -</span><span id="isolate_table_selects-25"><a href="#isolate_table_selects-25"><span class="linenos">25</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> +</span><span id="isolate_table_selects-25"><a href="#isolate_table_selects-25"><span class="linenos">25</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> </span><span id="isolate_table_selects-26"><a href="#isolate_table_selects-26"><span class="linenos">26</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> </span><span id="isolate_table_selects-27"><a href="#isolate_table_selects-27"><span class="linenos">27</span></a> <span class="p">)</span> </span><span id="isolate_table_selects-28"><a href="#isolate_table_selects-28"><span class="linenos">28</span></a> <span class="o">.</span><span class="n">subquery</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> diff --git a/docs/sqlglot/optimizer/merge_subqueries.html b/docs/sqlglot/optimizer/merge_subqueries.html index 9a7058d..57cb5d9 100644 --- a/docs/sqlglot/optimizer/merge_subqueries.html +++ b/docs/sqlglot/optimizer/merge_subqueries.html @@ -77,15 +77,15 @@ </span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> </span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a><span class="sd"> Example:</span> </span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y")</span> </span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> -</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> 'SELECT x.a FROM x CROSS JOIN y'</span> </span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> </span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> </span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y")</span> </span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y'</span> </span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> </span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> </span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> @@ -218,7 +218,7 @@ </span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">inner_from</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> </span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_from</span><span class="p">:</span> </span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">return</span> <span class="kc">False</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">inner_from_table</span> <span class="o">=</span> <span class="n">inner_from</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">inner_from_table</span> <span class="o">=</span> <span class="n">inner_from</span><span class="o">.</span><span class="n">alias_or_name</span> </span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">inner_projections</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">s</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selects</span><span class="p">}</span> </span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">return</span> <span class="nb">any</span><span class="p">(</span> </span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">col</span><span class="o">.</span><span class="n">table</span> <span class="o">!=</span> <span class="n">inner_from_table</span> @@ -231,220 +231,221 @@ </span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> </span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">UNMERGABLE_ARGS</span><span class="p">)</span> </span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span><span class="n">leave_tables_isolated</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">)</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="ow">and</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"LEFT"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="p">)</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">j</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="p">)</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="p">)</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_outer_select_joins_on_inner_select_join</span><span class="p">()</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_is_a_window_expression_in_unmergable_operation</span><span class="p">()</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="p">)</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">pivots</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span><span class="n">leave_tables_isolated</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">)</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="ow">and</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"LEFT"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="p">)</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">j</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="p">)</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="p">)</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_outer_select_joins_on_inner_select_join</span><span class="p">()</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_is_a_window_expression_in_unmergable_operation</span><span class="p">()</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="p">)</span> </span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a><span class="k">def</span> <span class="nf">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a><span class="sd"> Renames any sources in the inner query that conflict with names in the outer query.</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a><span class="sd"> Args:</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> alias (str)</span> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a><span class="sd"> """</span> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">conflicts</span> <span class="o">=</span> <span class="n">taken</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">))</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">conflicts</span> <span class="o">-=</span> <span class="p">{</span><span class="n">alias</span><span class="p">}</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="k">for</span> <span class="n">conflict</span> <span class="ow">in</span> <span class="n">conflicts</span><span class="p">:</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">new_name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="n">conflict</span><span class="p">)</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="n">source</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">conflict</span><span class="p">]</span> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">new_alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">)</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">new_alias</span><span class="p">))</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">new_alias</span><span class="p">)</span> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">new_alias</span><span class="p">))</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">source_columns</span><span class="p">(</span><span class="n">conflict</span><span class="p">):</span> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">))</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="n">inner_scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="n">conflict</span><span class="p">,</span> <span class="n">new_name</span><span class="p">)</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a><span class="k">def</span> <span class="nf">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a><span class="sd"> Renames any sources in the inner query that conflict with names in the outer query.</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a><span class="sd"> Args:</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a><span class="sd"> alias (str)</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a><span class="sd"> """</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">conflicts</span> <span class="o">=</span> <span class="n">taken</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">))</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="n">conflicts</span> <span class="o">-=</span> <span class="p">{</span><span class="n">alias</span><span class="p">}</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="k">for</span> <span class="n">conflict</span> <span class="ow">in</span> <span class="n">conflicts</span><span class="p">:</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="n">new_name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="n">conflict</span><span class="p">)</span> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">source</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">conflict</span><span class="p">]</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">new_alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">)</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">new_alias</span><span class="p">))</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">new_alias</span><span class="p">)</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">new_alias</span><span class="p">))</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">source_columns</span><span class="p">(</span><span class="n">conflict</span><span class="p">):</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">))</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="n">inner_scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="n">conflict</span><span class="p">,</span> <span class="n">new_name</span><span class="p">)</span> </span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a><span class="k">def</span> <span class="nf">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">node_to_replace</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="sd"> Merge FROM clause of inner query into outer query.</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a><span class="sd"> Args:</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a><span class="sd"> node_to_replace (exp.Subquery|exp.Table)</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a><span class="sd"> alias (str)</span> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> """</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="n">new_subquery</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_subquery</span><span class="p">)</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="k">for</span> <span class="n">join_hint</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">join_hints</span><span class="p">:</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">join_hint</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="o">==</span> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="n">table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">))</span> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">remove_source</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="p">)</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a><span class="k">def</span> <span class="nf">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">node_to_replace</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="sd"> Merge FROM clause of inner query into outer query.</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a><span class="sd"> Args:</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a><span class="sd"> node_to_replace (exp.Subquery|exp.Table)</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> alias (str)</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a><span class="sd"> """</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">new_subquery</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"from"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_subquery</span><span class="p">)</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="k">for</span> <span class="n">join_hint</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">join_hints</span><span class="p">:</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">join_hint</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="o">==</span> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">))</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">remove_source</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="p">)</span> </span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a><span class="k">def</span> <span class="nf">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="sd"> Merge JOIN clauses of inner query into outer query.</span> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a><span class="sd"> Args:</span> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> """</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">new_joins</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">comma_joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">comma_joins</span><span class="p">:</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">,</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">))</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">outer_joins</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="c1"># Maintain the join order</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="n">position</span> <span class="o">=</span> <span class="mi">0</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="n">position</span> <span class="o">=</span> <span class="n">outer_joins</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">outer_joins</span><span class="p">[</span><span class="n">position</span><span class="p">:</span><span class="n">position</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_joins</span> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="n">outer_joins</span><span class="p">)</span> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="k">def</span> <span class="nf">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a><span class="sd"> Merge JOIN clauses of inner query into outer query.</span> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> Args:</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a><span class="sd"> """</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">new_joins</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">comma_joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">comma_joins</span><span class="p">:</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">,</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">))</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="n">outer_joins</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="c1"># Maintain the join order</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">position</span> <span class="o">=</span> <span class="mi">0</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">position</span> <span class="o">=</span> <span class="n">outer_joins</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="n">outer_joins</span><span class="p">[</span><span class="n">position</span><span class="p">:</span><span class="n">position</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_joins</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="n">outer_joins</span><span class="p">)</span> </span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="k">def</span> <span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="sd"> Merge projections of inner query into outer query.</span> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> -</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="sd"> Args:</span> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> alias (str)</span> -</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> """</span> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="c1"># Collect all columns that reference the alias of the inner query</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">outer_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">:</span> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="n">outer_columns</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="c1"># Replace columns with the projection expression in the inner query</span> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="n">projection_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">projection_name</span><span class="p">:</span> -</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">continue</span> -</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="n">columns_to_replace</span> <span class="o">=</span> <span class="n">outer_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">projection_name</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_to_replace</span><span class="p">:</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">unalias</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="k">def</span> <span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a><span class="sd"> Merge projections of inner query into outer query.</span> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> Args:</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> alias (str)</span> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a><span class="sd"> """</span> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="c1"># Collect all columns that reference the alias of the inner query</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="n">outer_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">:</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="n">outer_columns</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="c1"># Replace columns with the projection expression in the inner query</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">projection_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">projection_name</span><span class="p">:</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="k">continue</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="n">columns_to_replace</span> <span class="o">=</span> <span class="n">outer_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">projection_name</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_to_replace</span><span class="p">:</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">unalias</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> </span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a><span class="k">def</span> <span class="nf">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a><span class="sd"> Merge WHERE clause of inner query into outer query.</span> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a><span class="sd"> Args:</span> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="sd"> """</span> -</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">return</span> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="c1"># Merge predicates from an outer join to the ON clause</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="c1"># if it only has columns that are already joined</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">}</span> <span class="k">if</span> <span class="n">from_</span> <span class="k">else</span> <span class="p">{}</span> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]:</span> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">sources</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">source</span><span class="p">)</span> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">if</span> <span class="n">source</span> <span class="o">==</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">break</span> -</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">if</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">))</span> <span class="o"><=</span> <span class="n">sources</span><span class="p">:</span> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">))</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">return</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> -</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">))</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a><span class="k">def</span> <span class="nf">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a><span class="sd"> Merge WHERE clause of inner query into outer query.</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a><span class="sd"> Args:</span> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a><span class="sd"> """</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="k">return</span> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="c1"># Merge predicates from an outer join to the ON clause</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="c1"># if it only has columns that are already joined</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">from_</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">}</span> <span class="k">if</span> <span class="n">from_</span> <span class="k">else</span> <span class="p">{}</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]:</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="n">sources</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">source</span><span class="p">)</span> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">if</span> <span class="n">source</span> <span class="o">==</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="k">break</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">))</span> <span class="o"><=</span> <span class="n">sources</span><span class="p">:</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">))</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="k">return</span> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">))</span> </span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a><span class="k">def</span> <span class="nf">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a><span class="sd"> Merge ORDER clause of inner query into outer query.</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a><span class="sd"> Args:</span> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a><span class="sd"> """</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"group"</span><span class="p">,</span> <span class="s2">"distinct"</span><span class="p">,</span> <span class="s2">"having"</span><span class="p">,</span> <span class="s2">"order"</span><span class="p">]</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="p">)</span> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="ow">or</span> <span class="nb">any</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="p">):</span> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="k">return</span> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">))</span> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a><span class="k">def</span> <span class="nf">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a><span class="sd"> Merge ORDER clause of inner query into outer query.</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="sd"> Args:</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a><span class="sd"> """</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"group"</span><span class="p">,</span> <span class="s2">"distinct"</span><span class="p">,</span> <span class="s2">"having"</span><span class="p">,</span> <span class="s2">"order"</span><span class="p">]</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="p">)</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="ow">or</span> <span class="nb">any</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="p">):</span> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="k">return</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">))</span> </span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a><span class="k">def</span> <span class="nf">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">inner_scope_hint</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_scope_hint</span><span class="p">:</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">return</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="n">outer_scope_hint</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">if</span> <span class="n">outer_scope_hint</span><span class="p">:</span> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">for</span> <span class="n">hint_expression</span> <span class="ow">in</span> <span class="n">inner_scope_hint</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">outer_scope_hint</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">hint_expression</span><span class="p">)</span> -</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">,</span> <span class="n">inner_scope_hint</span><span class="p">)</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a><span class="k">def</span> <span class="nf">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">inner_scope_hint</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_scope_hint</span><span class="p">:</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">return</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="n">outer_scope_hint</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">if</span> <span class="n">outer_scope_hint</span><span class="p">:</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">for</span> <span class="n">hint_expression</span> <span class="ow">in</span> <span class="n">inner_scope_hint</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="n">outer_scope_hint</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">hint_expression</span><span class="p">)</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">,</span> <span class="n">inner_scope_hint</span><span class="p">)</span> </span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a><span class="k">def</span> <span class="nf">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a><span class="sd"> Remove CTE from the AST.</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a><span class="sd"> Args:</span> -</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> """</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="k">def</span> <span class="nf">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a><span class="sd"> Remove CTE from the AST.</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> Args:</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="sd"> """</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> </span></pre></div> @@ -468,15 +469,15 @@ </span><span id="merge_subqueries-14"><a href="#merge_subqueries-14"><span class="linenos">14</span></a> </span><span id="merge_subqueries-15"><a href="#merge_subqueries-15"><span class="linenos">15</span></a><span class="sd"> Example:</span> </span><span id="merge_subqueries-16"><a href="#merge_subqueries-16"><span class="linenos">16</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="merge_subqueries-17"><a href="#merge_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="merge_subqueries-17"><a href="#merge_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y")</span> </span><span id="merge_subqueries-18"><a href="#merge_subqueries-18"><span class="linenos">18</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> -</span><span id="merge_subqueries-19"><a href="#merge_subqueries-19"><span class="linenos">19</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> +</span><span id="merge_subqueries-19"><a href="#merge_subqueries-19"><span class="linenos">19</span></a><span class="sd"> 'SELECT x.a FROM x CROSS JOIN y'</span> </span><span id="merge_subqueries-20"><a href="#merge_subqueries-20"><span class="linenos">20</span></a> </span><span id="merge_subqueries-21"><a href="#merge_subqueries-21"><span class="linenos">21</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> </span><span id="merge_subqueries-22"><a href="#merge_subqueries-22"><span class="linenos">22</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> -</span><span id="merge_subqueries-23"><a href="#merge_subqueries-23"><span class="linenos">23</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="merge_subqueries-23"><a href="#merge_subqueries-23"><span class="linenos">23</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y")</span> </span><span id="merge_subqueries-24"><a href="#merge_subqueries-24"><span class="linenos">24</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> -</span><span id="merge_subqueries-25"><a href="#merge_subqueries-25"><span class="linenos">25</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</span> +</span><span id="merge_subqueries-25"><a href="#merge_subqueries-25"><span class="linenos">25</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y'</span> </span><span id="merge_subqueries-26"><a href="#merge_subqueries-26"><span class="linenos">26</span></a> </span><span id="merge_subqueries-27"><a href="#merge_subqueries-27"><span class="linenos">27</span></a><span class="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> </span><span id="merge_subqueries-28"><a href="#merge_subqueries-28"><span class="linenos">28</span></a> @@ -501,9 +502,9 @@ <blockquote> <div class="pdoc-code codehilite"> <pre><span></span><code><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">sqlglot</span> -<span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a FROM (SELECT x.a FROM x) JOIN y"</span><span class="p">)</span> +<span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y"</span><span class="p">)</span> <span class="gp">>>> </span><span class="n">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span> -<span class="go">'SELECT x.a FROM x JOIN y'</span> +<span class="go">'SELECT x.a FROM x CROSS JOIN y'</span> </code></pre> </div> </blockquote> @@ -514,9 +515,9 @@ queries if it would result in multiple table selects in a single query:</p> <blockquote> <blockquote> <blockquote> - <p>expression = <a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a>("SELECT a FROM (SELECT x.a FROM x) JOIN y") + <p>expression = <a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a>("SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y") merge_subqueries(expression, leave_tables_isolated=True).sql() - 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</p> + 'SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y'</p> </blockquote> </blockquote> </blockquote> diff --git a/docs/sqlglot/optimizer/normalize.html b/docs/sqlglot/optimizer/normalize.html index c83a040..f25113f 100644 --- a/docs/sqlglot/optimizer/normalize.html +++ b/docs/sqlglot/optimizer/normalize.html @@ -68,12 +68,12 @@ <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span> </span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a> </span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span> <span class="nn">logging</span> -</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> -</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a> -</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> -</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> +</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a> +</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.generator</span> <span class="kn">import</span> <span class="n">cached_generator</span> </span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">while_changing</span> -</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.simplify</span> <span class="kn">import</span> <span class="n">flatten</span><span class="p">,</span> <span class="n">uniq_sort</span> +</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.simplify</span> <span class="kn">import</span> <span class="n">flatten</span><span class="p">,</span> <span class="n">rewrite_between</span><span class="p">,</span> <span class="n">uniq_sort</span> </span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a> </span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="n">logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s2">"sqlglot"</span><span class="p">)</span> </span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> @@ -95,141 +95,142 @@ </span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> Returns:</span> </span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> sqlglot.Expression: normalized expression</span> </span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> """</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">cache</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">generate</span> <span class="o">=</span> <span class="n">cached_generator</span><span class="p">()</span> </span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> </span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="n">e</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> </span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> </span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> </span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="k">continue</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">original</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> </span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="sa">f</span><span class="s2">"Skipping normalization because distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="p">)</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">original</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">while_changing</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="p">))</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="p">)</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">except</span> <span class="n">OptimizeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">original</span><span class="p">)</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">return</span> <span class="n">original</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">node</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">rewrite_between</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="sa">f</span><span class="s2">"Skipping normalization because distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="p">)</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">while_changing</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">))</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="p">)</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">except</span> <span class="n">OptimizeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">original</span><span class="p">)</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">return</span> <span class="n">original</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a><span class="k">def</span> <span class="nf">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">ancestor</span><span class="p">,</span> <span class="n">root</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">return</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">connector</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">ancestor</span><span class="p">)</span> <span class="k">for</span> <span class="n">connector</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">root</span><span class="p">))</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a><span class="k">def</span> <span class="nf">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">ancestor</span><span class="p">,</span> <span class="n">root</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">return</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">connector</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">ancestor</span><span class="p">)</span> <span class="k">for</span> <span class="n">connector</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">root</span><span class="p">))</span> </span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a><span class="k">def</span> <span class="nf">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a><span class="sd"> The difference in the number of predicates between the current expression and the normalized form.</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a><span class="sd"> This is used as an estimate of the cost of the conversion which is exponential in complexity.</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a><span class="sd"> Example:</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a><span class="sd"> >>> expression = sqlglot.parse_one("(a AND b) OR (c AND d)")</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a><span class="sd"> >>> normalization_distance(expression)</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a><span class="sd"> 4</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a><span class="sd"> Args:</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="sd"> expression (sqlglot.Expression): expression to compute distance</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="sd"> dnf (bool): compute to dnf distance instead</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a><span class="sd"> Returns:</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a><span class="sd"> int: difference</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a><span class="sd"> """</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">))</span> <span class="o">-</span> <span class="p">(</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="nb">sum</span><span class="p">(</span><span class="mi">1</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="p">)</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="k">def</span> <span class="nf">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a><span class="sd"> The difference in the number of predicates between the current expression and the normalized form.</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a><span class="sd"> This is used as an estimate of the cost of the conversion which is exponential in complexity.</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a><span class="sd"> Example:</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a><span class="sd"> >>> expression = sqlglot.parse_one("(a AND b) OR (c AND d)")</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a><span class="sd"> >>> normalization_distance(expression)</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a><span class="sd"> 4</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="sd"> Args:</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="sd"> expression (sqlglot.Expression): expression to compute distance</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a><span class="sd"> dnf (bool): compute to dnf distance instead</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a><span class="sd"> Returns:</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a><span class="sd"> int: difference</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a><span class="sd"> """</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">))</span> <span class="o">-</span> <span class="p">(</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="nb">sum</span><span class="p">(</span><span class="mi">1</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="p">)</span> </span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a><span class="k">def</span> <span class="nf">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">):</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a><span class="sd"> Returns a list of predicate lengths when expanded to normalized form.</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a><span class="sd"> (A AND B) OR C -> [2, 2] because len(A OR C), len(B OR C).</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a><span class="sd"> """</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">return</span> <span class="p">(</span><span class="mi">1</span><span class="p">,)</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">a</span> <span class="o">+</span> <span class="n">b</span> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="p">)</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">return</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> <span class="o">+</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a><span class="k">def</span> <span class="nf">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">):</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a><span class="sd"> Returns a list of predicate lengths when expanded to normalized form.</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a><span class="sd"> (A AND B) OR C -> [2, 2] because len(A OR C), len(B OR C).</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a><span class="sd"> """</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="p">(</span><span class="mi">1</span><span class="p">,)</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">a</span> <span class="o">+</span> <span class="n">b</span> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">return</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> <span class="o">+</span> <span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">dnf</span><span class="p">)</span> </span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a><span class="k">def</span> <span class="nf">distributive_law</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a><span class="sd"> x OR (y AND z) -> (x OR y) AND (x OR z)</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a><span class="sd"> (x AND y) OR (y AND z) -> (x OR y) AND (x OR z) AND (y OR y) AND (y OR z)</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a><span class="sd"> """</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Normalization distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="p">))</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">to_exp</span><span class="p">,</span> <span class="n">from_exp</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">from_exp</span><span class="p">):</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">from_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">from_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">to_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">to_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)))</span> <span class="o">></span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a><span class="k">def</span> <span class="nf">distributive_law</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">):</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a><span class="sd"> x OR (y AND z) -> (x OR y) AND (x OR z)</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a><span class="sd"> (x AND y) OR (y AND z) -> (x OR y) AND (x OR z) AND (y OR y) AND (y OR z)</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a><span class="sd"> """</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Normalization distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">))</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">to_exp</span><span class="p">,</span> <span class="n">from_exp</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">from_exp</span><span class="p">):</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">from_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">from_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">to_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">to_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)))</span> <span class="o">></span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a><span class="k">def</span> <span class="nf">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">):</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">a</span><span class="p">,</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="k">lambda</span> <span class="n">c</span><span class="p">:</span> <span class="n">to_func</span><span class="p">(</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">left</span><span class="p">)),</span> <span class="n">cache</span><span class="p">),</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">right</span><span class="p">)),</span> <span class="n">cache</span><span class="p">),</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="p">),</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="p">)</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">a</span> <span class="o">=</span> <span class="n">to_func</span><span class="p">(</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">left</span><span class="p">)),</span> <span class="n">cache</span><span class="p">),</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">right</span><span class="p">)),</span> <span class="n">cache</span><span class="p">),</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="p">)</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">return</span> <span class="n">a</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a><span class="k">def</span> <span class="nf">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">):</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">a</span><span class="p">,</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">lambda</span> <span class="n">c</span><span class="p">:</span> <span class="n">to_func</span><span class="p">(</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">left</span><span class="p">)),</span> <span class="n">generate</span><span class="p">),</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">right</span><span class="p">)),</span> <span class="n">generate</span><span class="p">),</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="p">),</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="p">)</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">a</span> <span class="o">=</span> <span class="n">to_func</span><span class="p">(</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">left</span><span class="p">)),</span> <span class="n">generate</span><span class="p">),</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">flatten</span><span class="p">(</span><span class="n">from_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">right</span><span class="p">)),</span> <span class="n">generate</span><span class="p">),</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="p">)</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">return</span> <span class="n">a</span> </span></pre></div> @@ -262,38 +263,39 @@ </span><span id="normalize-29"><a href="#normalize-29"><span class="linenos">29</span></a><span class="sd"> Returns:</span> </span><span id="normalize-30"><a href="#normalize-30"><span class="linenos">30</span></a><span class="sd"> sqlglot.Expression: normalized expression</span> </span><span id="normalize-31"><a href="#normalize-31"><span class="linenos">31</span></a><span class="sd"> """</span> -</span><span id="normalize-32"><a href="#normalize-32"><span class="linenos">32</span></a> <span class="n">cache</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="normalize-32"><a href="#normalize-32"><span class="linenos">32</span></a> <span class="n">generate</span> <span class="o">=</span> <span class="n">cached_generator</span><span class="p">()</span> </span><span id="normalize-33"><a href="#normalize-33"><span class="linenos">33</span></a> </span><span id="normalize-34"><a href="#normalize-34"><span class="linenos">34</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="n">e</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> </span><span id="normalize-35"><a href="#normalize-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> </span><span id="normalize-36"><a href="#normalize-36"><span class="linenos">36</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> </span><span id="normalize-37"><a href="#normalize-37"><span class="linenos">37</span></a> <span class="k">continue</span> -</span><span id="normalize-38"><a href="#normalize-38"><span class="linenos">38</span></a> -</span><span id="normalize-39"><a href="#normalize-39"><span class="linenos">39</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="normalize-38"><a href="#normalize-38"><span class="linenos">38</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span> +</span><span id="normalize-39"><a href="#normalize-39"><span class="linenos">39</span></a> <span class="n">original</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> </span><span id="normalize-40"><a href="#normalize-40"><span class="linenos">40</span></a> -</span><span id="normalize-41"><a href="#normalize-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> -</span><span id="normalize-42"><a href="#normalize-42"><span class="linenos">42</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> -</span><span id="normalize-43"><a href="#normalize-43"><span class="linenos">43</span></a> <span class="sa">f</span><span class="s2">"Skipping normalization because distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span> -</span><span id="normalize-44"><a href="#normalize-44"><span class="linenos">44</span></a> <span class="p">)</span> -</span><span id="normalize-45"><a href="#normalize-45"><span class="linenos">45</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="normalize-46"><a href="#normalize-46"><span class="linenos">46</span></a> -</span><span id="normalize-47"><a href="#normalize-47"><span class="linenos">47</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span> -</span><span id="normalize-48"><a href="#normalize-48"><span class="linenos">48</span></a> <span class="n">original</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="normalize-49"><a href="#normalize-49"><span class="linenos">49</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="normalize-50"><a href="#normalize-50"><span class="linenos">50</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> -</span><span id="normalize-51"><a href="#normalize-51"><span class="linenos">51</span></a> <span class="n">while_changing</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="p">))</span> -</span><span id="normalize-52"><a href="#normalize-52"><span class="linenos">52</span></a> <span class="p">)</span> -</span><span id="normalize-53"><a href="#normalize-53"><span class="linenos">53</span></a> <span class="k">except</span> <span class="n">OptimizeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> -</span><span id="normalize-54"><a href="#normalize-54"><span class="linenos">54</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> -</span><span id="normalize-55"><a href="#normalize-55"><span class="linenos">55</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">original</span><span class="p">)</span> -</span><span id="normalize-56"><a href="#normalize-56"><span class="linenos">56</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="normalize-57"><a href="#normalize-57"><span class="linenos">57</span></a> <span class="k">return</span> <span class="n">original</span> -</span><span id="normalize-58"><a href="#normalize-58"><span class="linenos">58</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="normalize-59"><a href="#normalize-59"><span class="linenos">59</span></a> -</span><span id="normalize-60"><a href="#normalize-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="normalize-61"><a href="#normalize-61"><span class="linenos">61</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="normalize-62"><a href="#normalize-62"><span class="linenos">62</span></a> -</span><span id="normalize-63"><a href="#normalize-63"><span class="linenos">63</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="normalize-41"><a href="#normalize-41"><span class="linenos">41</span></a> <span class="n">node</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">rewrite_between</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="normalize-42"><a href="#normalize-42"><span class="linenos">42</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="normalize-43"><a href="#normalize-43"><span class="linenos">43</span></a> +</span><span id="normalize-44"><a href="#normalize-44"><span class="linenos">44</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> +</span><span id="normalize-45"><a href="#normalize-45"><span class="linenos">45</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> +</span><span id="normalize-46"><a href="#normalize-46"><span class="linenos">46</span></a> <span class="sa">f</span><span class="s2">"Skipping normalization because distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span> +</span><span id="normalize-47"><a href="#normalize-47"><span class="linenos">47</span></a> <span class="p">)</span> +</span><span id="normalize-48"><a href="#normalize-48"><span class="linenos">48</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="normalize-49"><a href="#normalize-49"><span class="linenos">49</span></a> +</span><span id="normalize-50"><a href="#normalize-50"><span class="linenos">50</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="normalize-51"><a href="#normalize-51"><span class="linenos">51</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> +</span><span id="normalize-52"><a href="#normalize-52"><span class="linenos">52</span></a> <span class="n">while_changing</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">))</span> +</span><span id="normalize-53"><a href="#normalize-53"><span class="linenos">53</span></a> <span class="p">)</span> +</span><span id="normalize-54"><a href="#normalize-54"><span class="linenos">54</span></a> <span class="k">except</span> <span class="n">OptimizeError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> +</span><span id="normalize-55"><a href="#normalize-55"><span class="linenos">55</span></a> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> +</span><span id="normalize-56"><a href="#normalize-56"><span class="linenos">56</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">original</span><span class="p">)</span> +</span><span id="normalize-57"><a href="#normalize-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="normalize-58"><a href="#normalize-58"><span class="linenos">58</span></a> <span class="k">return</span> <span class="n">original</span> +</span><span id="normalize-59"><a href="#normalize-59"><span class="linenos">59</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="normalize-60"><a href="#normalize-60"><span class="linenos">60</span></a> +</span><span id="normalize-61"><a href="#normalize-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="normalize-62"><a href="#normalize-62"><span class="linenos">62</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="normalize-63"><a href="#normalize-63"><span class="linenos">63</span></a> +</span><span id="normalize-64"><a href="#normalize-64"><span class="linenos">64</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -339,10 +341,10 @@ </div> <a class="headerlink" href="#normalized"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="normalized-66"><a href="#normalized-66"><span class="linenos">66</span></a><span class="k">def</span> <span class="nf">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="normalized-67"><a href="#normalized-67"><span class="linenos">67</span></a> <span class="n">ancestor</span><span class="p">,</span> <span class="n">root</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> -</span><span id="normalized-68"><a href="#normalized-68"><span class="linenos">68</span></a> -</span><span id="normalized-69"><a href="#normalized-69"><span class="linenos">69</span></a> <span class="k">return</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">connector</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">ancestor</span><span class="p">)</span> <span class="k">for</span> <span class="n">connector</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">root</span><span class="p">))</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="normalized-67"><a href="#normalized-67"><span class="linenos">67</span></a><span class="k">def</span> <span class="nf">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="normalized-68"><a href="#normalized-68"><span class="linenos">68</span></a> <span class="n">ancestor</span><span class="p">,</span> <span class="n">root</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> +</span><span id="normalized-69"><a href="#normalized-69"><span class="linenos">69</span></a> +</span><span id="normalized-70"><a href="#normalized-70"><span class="linenos">70</span></a> <span class="k">return</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">connector</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">ancestor</span><span class="p">)</span> <span class="k">for</span> <span class="n">connector</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">root</span><span class="p">))</span> </span></pre></div> @@ -360,27 +362,27 @@ </div> <a class="headerlink" href="#normalization_distance"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="normalization_distance-72"><a href="#normalization_distance-72"><span class="linenos">72</span></a><span class="k">def</span> <span class="nf">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="normalization_distance-73"><a href="#normalization_distance-73"><span class="linenos">73</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="normalization_distance-74"><a href="#normalization_distance-74"><span class="linenos">74</span></a><span class="sd"> The difference in the number of predicates between the current expression and the normalized form.</span> -</span><span id="normalization_distance-75"><a href="#normalization_distance-75"><span class="linenos">75</span></a> -</span><span id="normalization_distance-76"><a href="#normalization_distance-76"><span class="linenos">76</span></a><span class="sd"> This is used as an estimate of the cost of the conversion which is exponential in complexity.</span> -</span><span id="normalization_distance-77"><a href="#normalization_distance-77"><span class="linenos">77</span></a> -</span><span id="normalization_distance-78"><a href="#normalization_distance-78"><span class="linenos">78</span></a><span class="sd"> Example:</span> -</span><span id="normalization_distance-79"><a href="#normalization_distance-79"><span class="linenos">79</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="normalization_distance-80"><a href="#normalization_distance-80"><span class="linenos">80</span></a><span class="sd"> >>> expression = sqlglot.parse_one("(a AND b) OR (c AND d)")</span> -</span><span id="normalization_distance-81"><a href="#normalization_distance-81"><span class="linenos">81</span></a><span class="sd"> >>> normalization_distance(expression)</span> -</span><span id="normalization_distance-82"><a href="#normalization_distance-82"><span class="linenos">82</span></a><span class="sd"> 4</span> -</span><span id="normalization_distance-83"><a href="#normalization_distance-83"><span class="linenos">83</span></a> -</span><span id="normalization_distance-84"><a href="#normalization_distance-84"><span class="linenos">84</span></a><span class="sd"> Args:</span> -</span><span id="normalization_distance-85"><a href="#normalization_distance-85"><span class="linenos">85</span></a><span class="sd"> expression (sqlglot.Expression): expression to compute distance</span> -</span><span id="normalization_distance-86"><a href="#normalization_distance-86"><span class="linenos">86</span></a><span class="sd"> dnf (bool): compute to dnf distance instead</span> -</span><span id="normalization_distance-87"><a href="#normalization_distance-87"><span class="linenos">87</span></a><span class="sd"> Returns:</span> -</span><span id="normalization_distance-88"><a href="#normalization_distance-88"><span class="linenos">88</span></a><span class="sd"> int: difference</span> -</span><span id="normalization_distance-89"><a href="#normalization_distance-89"><span class="linenos">89</span></a><span class="sd"> """</span> -</span><span id="normalization_distance-90"><a href="#normalization_distance-90"><span class="linenos">90</span></a> <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">))</span> <span class="o">-</span> <span class="p">(</span> -</span><span id="normalization_distance-91"><a href="#normalization_distance-91"><span class="linenos">91</span></a> <span class="nb">sum</span><span class="p">(</span><span class="mi">1</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="normalization_distance-92"><a href="#normalization_distance-92"><span class="linenos">92</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="normalization_distance-73"><a href="#normalization_distance-73"><span class="linenos">73</span></a><span class="k">def</span> <span class="nf">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="normalization_distance-74"><a href="#normalization_distance-74"><span class="linenos">74</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="normalization_distance-75"><a href="#normalization_distance-75"><span class="linenos">75</span></a><span class="sd"> The difference in the number of predicates between the current expression and the normalized form.</span> +</span><span id="normalization_distance-76"><a href="#normalization_distance-76"><span class="linenos">76</span></a> +</span><span id="normalization_distance-77"><a href="#normalization_distance-77"><span class="linenos">77</span></a><span class="sd"> This is used as an estimate of the cost of the conversion which is exponential in complexity.</span> +</span><span id="normalization_distance-78"><a href="#normalization_distance-78"><span class="linenos">78</span></a> +</span><span id="normalization_distance-79"><a href="#normalization_distance-79"><span class="linenos">79</span></a><span class="sd"> Example:</span> +</span><span id="normalization_distance-80"><a href="#normalization_distance-80"><span class="linenos">80</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="normalization_distance-81"><a href="#normalization_distance-81"><span class="linenos">81</span></a><span class="sd"> >>> expression = sqlglot.parse_one("(a AND b) OR (c AND d)")</span> +</span><span id="normalization_distance-82"><a href="#normalization_distance-82"><span class="linenos">82</span></a><span class="sd"> >>> normalization_distance(expression)</span> +</span><span id="normalization_distance-83"><a href="#normalization_distance-83"><span class="linenos">83</span></a><span class="sd"> 4</span> +</span><span id="normalization_distance-84"><a href="#normalization_distance-84"><span class="linenos">84</span></a> +</span><span id="normalization_distance-85"><a href="#normalization_distance-85"><span class="linenos">85</span></a><span class="sd"> Args:</span> +</span><span id="normalization_distance-86"><a href="#normalization_distance-86"><span class="linenos">86</span></a><span class="sd"> expression (sqlglot.Expression): expression to compute distance</span> +</span><span id="normalization_distance-87"><a href="#normalization_distance-87"><span class="linenos">87</span></a><span class="sd"> dnf (bool): compute to dnf distance instead</span> +</span><span id="normalization_distance-88"><a href="#normalization_distance-88"><span class="linenos">88</span></a><span class="sd"> Returns:</span> +</span><span id="normalization_distance-89"><a href="#normalization_distance-89"><span class="linenos">89</span></a><span class="sd"> int: difference</span> +</span><span id="normalization_distance-90"><a href="#normalization_distance-90"><span class="linenos">90</span></a><span class="sd"> """</span> +</span><span id="normalization_distance-91"><a href="#normalization_distance-91"><span class="linenos">91</span></a> <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="n">_predicate_lengths</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">))</span> <span class="o">-</span> <span class="p">(</span> +</span><span id="normalization_distance-92"><a href="#normalization_distance-92"><span class="linenos">92</span></a> <span class="nb">sum</span><span class="p">(</span><span class="mi">1</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="normalization_distance-93"><a href="#normalization_distance-93"><span class="linenos">93</span></a> <span class="p">)</span> </span></pre></div> @@ -421,44 +423,44 @@ <div class="attr function"> <span class="def">def</span> - <span class="name">distributive_law</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">dnf</span>, </span><span class="param"><span class="n">max_distance</span>, </span><span class="param"><span class="n">cache</span><span class="o">=</span><span class="kc">None</span></span><span class="return-annotation">):</span></span> + <span class="name">distributive_law</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">dnf</span>, </span><span class="param"><span class="n">max_distance</span>, </span><span class="param"><span class="n">generate</span></span><span class="return-annotation">):</span></span> <label class="view-source-button" for="distributive_law-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#distributive_law"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="distributive_law-115"><a href="#distributive_law-115"><span class="linenos">115</span></a><span class="k">def</span> <span class="nf">distributive_law</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> -</span><span id="distributive_law-116"><a href="#distributive_law-116"><span class="linenos">116</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="distributive_law-117"><a href="#distributive_law-117"><span class="linenos">117</span></a><span class="sd"> x OR (y AND z) -> (x OR y) AND (x OR z)</span> -</span><span id="distributive_law-118"><a href="#distributive_law-118"><span class="linenos">118</span></a><span class="sd"> (x AND y) OR (y AND z) -> (x OR y) AND (x OR z) AND (y OR y) AND (y OR z)</span> -</span><span id="distributive_law-119"><a href="#distributive_law-119"><span class="linenos">119</span></a><span class="sd"> """</span> -</span><span id="distributive_law-120"><a href="#distributive_law-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> -</span><span id="distributive_law-121"><a href="#distributive_law-121"><span class="linenos">121</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="distributive_law-122"><a href="#distributive_law-122"><span class="linenos">122</span></a> -</span><span id="distributive_law-123"><a href="#distributive_law-123"><span class="linenos">123</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> -</span><span id="distributive_law-124"><a href="#distributive_law-124"><span class="linenos">124</span></a> -</span><span id="distributive_law-125"><a href="#distributive_law-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> -</span><span id="distributive_law-126"><a href="#distributive_law-126"><span class="linenos">126</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Normalization distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="distributive_law-127"><a href="#distributive_law-127"><span class="linenos">127</span></a> -</span><span id="distributive_law-128"><a href="#distributive_law-128"><span class="linenos">128</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">cache</span><span class="p">))</span> -</span><span id="distributive_law-129"><a href="#distributive_law-129"><span class="linenos">129</span></a> <span class="n">to_exp</span><span class="p">,</span> <span class="n">from_exp</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> -</span><span id="distributive_law-130"><a href="#distributive_law-130"><span class="linenos">130</span></a> -</span><span id="distributive_law-131"><a href="#distributive_law-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">from_exp</span><span class="p">):</span> -</span><span id="distributive_law-132"><a href="#distributive_law-132"><span class="linenos">132</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="distributive_law-133"><a href="#distributive_law-133"><span class="linenos">133</span></a> -</span><span id="distributive_law-134"><a href="#distributive_law-134"><span class="linenos">134</span></a> <span class="n">from_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">from_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="distributive_law-135"><a href="#distributive_law-135"><span class="linenos">135</span></a> <span class="n">to_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">to_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="distributive_law-136"><a href="#distributive_law-136"><span class="linenos">136</span></a> -</span><span id="distributive_law-137"><a href="#distributive_law-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="distributive_law-138"><a href="#distributive_law-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)))</span> <span class="o">></span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> -</span><span id="distributive_law-139"><a href="#distributive_law-139"><span class="linenos">139</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="distributive_law-140"><a href="#distributive_law-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="distributive_law-141"><a href="#distributive_law-141"><span class="linenos">141</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="distributive_law-142"><a href="#distributive_law-142"><span class="linenos">142</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="distributive_law-143"><a href="#distributive_law-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> -</span><span id="distributive_law-144"><a href="#distributive_law-144"><span class="linenos">144</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">cache</span><span class="p">)</span> -</span><span id="distributive_law-145"><a href="#distributive_law-145"><span class="linenos">145</span></a> -</span><span id="distributive_law-146"><a href="#distributive_law-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="distributive_law-116"><a href="#distributive_law-116"><span class="linenos">116</span></a><span class="k">def</span> <span class="nf">distributive_law</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">):</span> +</span><span id="distributive_law-117"><a href="#distributive_law-117"><span class="linenos">117</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="distributive_law-118"><a href="#distributive_law-118"><span class="linenos">118</span></a><span class="sd"> x OR (y AND z) -> (x OR y) AND (x OR z)</span> +</span><span id="distributive_law-119"><a href="#distributive_law-119"><span class="linenos">119</span></a><span class="sd"> (x AND y) OR (y AND z) -> (x OR y) AND (x OR z) AND (y OR y) AND (y OR z)</span> +</span><span id="distributive_law-120"><a href="#distributive_law-120"><span class="linenos">120</span></a><span class="sd"> """</span> +</span><span id="distributive_law-121"><a href="#distributive_law-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">normalized</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">):</span> +</span><span id="distributive_law-122"><a href="#distributive_law-122"><span class="linenos">122</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="distributive_law-123"><a href="#distributive_law-123"><span class="linenos">123</span></a> +</span><span id="distributive_law-124"><a href="#distributive_law-124"><span class="linenos">124</span></a> <span class="n">distance</span> <span class="o">=</span> <span class="n">normalization_distance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="n">dnf</span><span class="p">)</span> +</span><span id="distributive_law-125"><a href="#distributive_law-125"><span class="linenos">125</span></a> +</span><span id="distributive_law-126"><a href="#distributive_law-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">distance</span> <span class="o">></span> <span class="n">max_distance</span><span class="p">:</span> +</span><span id="distributive_law-127"><a href="#distributive_law-127"><span class="linenos">127</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Normalization distance </span><span class="si">{</span><span class="n">distance</span><span class="si">}</span><span class="s2"> exceeds max </span><span class="si">{</span><span class="n">max_distance</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="distributive_law-128"><a href="#distributive_law-128"><span class="linenos">128</span></a> +</span><span id="distributive_law-129"><a href="#distributive_law-129"><span class="linenos">129</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">distributive_law</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">dnf</span><span class="p">,</span> <span class="n">max_distance</span><span class="p">,</span> <span class="n">generate</span><span class="p">))</span> +</span><span id="distributive_law-130"><a href="#distributive_law-130"><span class="linenos">130</span></a> <span class="n">to_exp</span><span class="p">,</span> <span class="n">from_exp</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">if</span> <span class="n">dnf</span> <span class="k">else</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> +</span><span id="distributive_law-131"><a href="#distributive_law-131"><span class="linenos">131</span></a> +</span><span id="distributive_law-132"><a href="#distributive_law-132"><span class="linenos">132</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">from_exp</span><span class="p">):</span> +</span><span id="distributive_law-133"><a href="#distributive_law-133"><span class="linenos">133</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="distributive_law-134"><a href="#distributive_law-134"><span class="linenos">134</span></a> +</span><span id="distributive_law-135"><a href="#distributive_law-135"><span class="linenos">135</span></a> <span class="n">from_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">from_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="distributive_law-136"><a href="#distributive_law-136"><span class="linenos">136</span></a> <span class="n">to_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="n">to_exp</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="distributive_law-137"><a href="#distributive_law-137"><span class="linenos">137</span></a> +</span><span id="distributive_law-138"><a href="#distributive_law-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="distributive_law-139"><a href="#distributive_law-139"><span class="linenos">139</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)))</span> <span class="o">></span> <span class="nb">len</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">))):</span> +</span><span id="distributive_law-140"><a href="#distributive_law-140"><span class="linenos">140</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="distributive_law-141"><a href="#distributive_law-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="distributive_law-142"><a href="#distributive_law-142"><span class="linenos">142</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="distributive_law-143"><a href="#distributive_law-143"><span class="linenos">143</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="distributive_law-144"><a href="#distributive_law-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">to_exp</span><span class="p">):</span> +</span><span id="distributive_law-145"><a href="#distributive_law-145"><span class="linenos">145</span></a> <span class="k">return</span> <span class="n">_distribute</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">from_func</span><span class="p">,</span> <span class="n">to_func</span><span class="p">,</span> <span class="n">generate</span><span class="p">)</span> +</span><span id="distributive_law-146"><a href="#distributive_law-146"><span class="linenos">146</span></a> +</span><span id="distributive_law-147"><a href="#distributive_law-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/optimize_joins.html b/docs/sqlglot/optimizer/optimize_joins.html index 7e0cab7..09be940 100644 --- a/docs/sqlglot/optimizer/optimize_joins.html +++ b/docs/sqlglot/optimizer/optimize_joins.html @@ -68,81 +68,86 @@ <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> </span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">tsort</span> </span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a> -</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a> -</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="k">def</span> <span class="nf">optimize_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="sd"> Removes cross joins if possible and reorder joins based on predicate dependencies.</span> -</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a> -</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="sd"> Example:</span> -</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="sd"> >>> from sqlglot import parse_one</span> -</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a><span class="sd"> >>> optimize_joins(parse_one("SELECT * FROM x CROSS JOIN y JOIN z ON x.a = z.a AND y.a = z.a")).sql()</span> -</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> 'SELECT * FROM x JOIN z ON x.a = z.a AND TRUE JOIN y ON y.a = z.a'</span> -</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> """</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a> <span class="n">references</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a> <span class="n">cross_joins</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a> -</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[]):</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a> -</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> <span class="k">if</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="n">references</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="p">[])</span> <span class="o">+</span> <span class="p">[</span><span class="n">join</span><span class="p">]</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="n">cross_joins</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">join</span><span class="p">))</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> -</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">cross_joins</span><span class="p">:</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="k">for</span> <span class="n">dep</span> <span class="ow">in</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="p">[]):</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">dep</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> -</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">on</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">flatten</span><span class="p">():</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">):</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="n">join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> -</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> -</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> -</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a><span class="k">def</span> <span class="nf">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a><span class="sd"> Reorder joins by topological sort order based on predicate references.</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a><span class="sd"> """</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="k">for</span> <span class="n">from_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">head</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">parent</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])}</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">dag</span> <span class="o">=</span> <span class="p">{</span><span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="p">[]}</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> -</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="n">dag</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> -</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="s2">"joins"</span><span class="p">,</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="p">[</span><span class="n">joins</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">tsort</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">],</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="p">)</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> -</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> -</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a><span class="k">def</span> <span class="nf">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a><span class="sd"> Remove INNER and OUTER from joins as they are optional.</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a><span class="sd"> """</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">!=</span> <span class="s2">"CROSS"</span><span class="p">:</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> +</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="n">JOIN_ATTRS</span> <span class="o">=</span> <span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="s2">"side"</span><span class="p">,</span> <span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"using"</span><span class="p">,</span> <span class="s2">"natural"</span><span class="p">)</span> +</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="k">def</span> <span class="nf">optimize_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="sd"> Removes cross joins if possible and reorder joins based on predicate dependencies.</span> +</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a> +</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a><span class="sd"> Example:</span> +</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> >>> from sqlglot import parse_one</span> +</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> >>> optimize_joins(parse_one("SELECT * FROM x CROSS JOIN y JOIN z ON x.a = z.a AND y.a = z.a")).sql()</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="sd"> 'SELECT * FROM x JOIN z ON x.a = z.a AND TRUE JOIN y ON y.a = z.a'</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="sd"> """</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a> <span class="n">references</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a> <span class="n">cross_joins</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a> +</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[]):</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a> +</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a> <span class="k">if</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="n">references</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="p">[])</span> <span class="o">+</span> <span class="p">[</span><span class="n">join</span><span class="p">]</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">cross_joins</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">join</span><span class="p">))</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> +</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">cross_joins</span><span class="p">:</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">dep</span> <span class="ow">in</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="p">[]):</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">dep</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> +</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">on</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">flatten</span><span class="p">():</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">):</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="n">join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> +</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> +</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> +</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a><span class="k">def</span> <span class="nf">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a><span class="sd"> Reorder joins by topological sort order based on predicate references.</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a><span class="sd"> """</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="k">for</span> <span class="n">from_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">head</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">parent</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])}</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="n">dag</span> <span class="o">=</span> <span class="p">{</span><span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="p">[]}</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> +</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="n">dag</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> +</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="s2">"joins"</span><span class="p">,</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="p">[</span><span class="n">joins</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">tsort</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">],</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="p">)</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> +</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> +</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a><span class="k">def</span> <span class="nf">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a><span class="sd"> Remove INNER and OUTER from joins as they are optional.</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a><span class="sd"> """</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">JOIN_ATTRS</span><span class="p">):</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> </span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a> -</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a><span class="k">def</span> <span class="nf">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">exclude</span><span class="p">):</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a> <span class="k">return</span> <span class="p">[</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a> <span class="n">name</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()))</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">exclude</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a> <span class="p">]</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">!=</span> <span class="s2">"CROSS"</span><span class="p">:</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a> +</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a> +</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a><span class="k">def</span> <span class="nf">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">exclude</span><span class="p">):</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos">79</span></a> <span class="k">return</span> <span class="p">[</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos">80</span></a> <span class="n">name</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos">81</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()))</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos">82</span></a> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">exclude</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos">83</span></a> <span class="p">]</span> </span></pre></div> @@ -158,42 +163,42 @@ </div> <a class="headerlink" href="#optimize_joins"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="optimize_joins-6"><a href="#optimize_joins-6"><span class="linenos"> 6</span></a><span class="k">def</span> <span class="nf">optimize_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="optimize_joins-7"><a href="#optimize_joins-7"><span class="linenos"> 7</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="optimize_joins-8"><a href="#optimize_joins-8"><span class="linenos"> 8</span></a><span class="sd"> Removes cross joins if possible and reorder joins based on predicate dependencies.</span> -</span><span id="optimize_joins-9"><a href="#optimize_joins-9"><span class="linenos"> 9</span></a> -</span><span id="optimize_joins-10"><a href="#optimize_joins-10"><span class="linenos">10</span></a><span class="sd"> Example:</span> -</span><span id="optimize_joins-11"><a href="#optimize_joins-11"><span class="linenos">11</span></a><span class="sd"> >>> from sqlglot import parse_one</span> -</span><span id="optimize_joins-12"><a href="#optimize_joins-12"><span class="linenos">12</span></a><span class="sd"> >>> optimize_joins(parse_one("SELECT * FROM x CROSS JOIN y JOIN z ON x.a = z.a AND y.a = z.a")).sql()</span> -</span><span id="optimize_joins-13"><a href="#optimize_joins-13"><span class="linenos">13</span></a><span class="sd"> 'SELECT * FROM x JOIN z ON x.a = z.a AND TRUE JOIN y ON y.a = z.a'</span> -</span><span id="optimize_joins-14"><a href="#optimize_joins-14"><span class="linenos">14</span></a><span class="sd"> """</span> -</span><span id="optimize_joins-15"><a href="#optimize_joins-15"><span class="linenos">15</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="optimize_joins-16"><a href="#optimize_joins-16"><span class="linenos">16</span></a> <span class="n">references</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="optimize_joins-17"><a href="#optimize_joins-17"><span class="linenos">17</span></a> <span class="n">cross_joins</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="optimize_joins-18"><a href="#optimize_joins-18"><span class="linenos">18</span></a> -</span><span id="optimize_joins-19"><a href="#optimize_joins-19"><span class="linenos">19</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[]):</span> -</span><span id="optimize_joins-20"><a href="#optimize_joins-20"><span class="linenos">20</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="optimize_joins-21"><a href="#optimize_joins-21"><span class="linenos">21</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="optimize_joins-22"><a href="#optimize_joins-22"><span class="linenos">22</span></a> -</span><span id="optimize_joins-23"><a href="#optimize_joins-23"><span class="linenos">23</span></a> <span class="k">if</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="optimize_joins-24"><a href="#optimize_joins-24"><span class="linenos">24</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="optimize_joins-25"><a href="#optimize_joins-25"><span class="linenos">25</span></a> <span class="n">references</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="p">[])</span> <span class="o">+</span> <span class="p">[</span><span class="n">join</span><span class="p">]</span> -</span><span id="optimize_joins-26"><a href="#optimize_joins-26"><span class="linenos">26</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="optimize_joins-27"><a href="#optimize_joins-27"><span class="linenos">27</span></a> <span class="n">cross_joins</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">join</span><span class="p">))</span> -</span><span id="optimize_joins-28"><a href="#optimize_joins-28"><span class="linenos">28</span></a> -</span><span id="optimize_joins-29"><a href="#optimize_joins-29"><span class="linenos">29</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">cross_joins</span><span class="p">:</span> -</span><span id="optimize_joins-30"><a href="#optimize_joins-30"><span class="linenos">30</span></a> <span class="k">for</span> <span class="n">dep</span> <span class="ow">in</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="p">[]):</span> -</span><span id="optimize_joins-31"><a href="#optimize_joins-31"><span class="linenos">31</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">dep</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span> -</span><span id="optimize_joins-32"><a href="#optimize_joins-32"><span class="linenos">32</span></a> -</span><span id="optimize_joins-33"><a href="#optimize_joins-33"><span class="linenos">33</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">on</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="optimize_joins-34"><a href="#optimize_joins-34"><span class="linenos">34</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">flatten</span><span class="p">():</span> -</span><span id="optimize_joins-35"><a href="#optimize_joins-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">):</span> -</span><span id="optimize_joins-36"><a href="#optimize_joins-36"><span class="linenos">36</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="optimize_joins-37"><a href="#optimize_joins-37"><span class="linenos">37</span></a> <span class="n">join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="optimize_joins-38"><a href="#optimize_joins-38"><span class="linenos">38</span></a> -</span><span id="optimize_joins-39"><a href="#optimize_joins-39"><span class="linenos">39</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="optimize_joins-40"><a href="#optimize_joins-40"><span class="linenos">40</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="optimize_joins-41"><a href="#optimize_joins-41"><span class="linenos">41</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="optimize_joins-8"><a href="#optimize_joins-8"><span class="linenos"> 8</span></a><span class="k">def</span> <span class="nf">optimize_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="optimize_joins-9"><a href="#optimize_joins-9"><span class="linenos"> 9</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="optimize_joins-10"><a href="#optimize_joins-10"><span class="linenos">10</span></a><span class="sd"> Removes cross joins if possible and reorder joins based on predicate dependencies.</span> +</span><span id="optimize_joins-11"><a href="#optimize_joins-11"><span class="linenos">11</span></a> +</span><span id="optimize_joins-12"><a href="#optimize_joins-12"><span class="linenos">12</span></a><span class="sd"> Example:</span> +</span><span id="optimize_joins-13"><a href="#optimize_joins-13"><span class="linenos">13</span></a><span class="sd"> >>> from sqlglot import parse_one</span> +</span><span id="optimize_joins-14"><a href="#optimize_joins-14"><span class="linenos">14</span></a><span class="sd"> >>> optimize_joins(parse_one("SELECT * FROM x CROSS JOIN y JOIN z ON x.a = z.a AND y.a = z.a")).sql()</span> +</span><span id="optimize_joins-15"><a href="#optimize_joins-15"><span class="linenos">15</span></a><span class="sd"> 'SELECT * FROM x JOIN z ON x.a = z.a AND TRUE JOIN y ON y.a = z.a'</span> +</span><span id="optimize_joins-16"><a href="#optimize_joins-16"><span class="linenos">16</span></a><span class="sd"> """</span> +</span><span id="optimize_joins-17"><a href="#optimize_joins-17"><span class="linenos">17</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="optimize_joins-18"><a href="#optimize_joins-18"><span class="linenos">18</span></a> <span class="n">references</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="optimize_joins-19"><a href="#optimize_joins-19"><span class="linenos">19</span></a> <span class="n">cross_joins</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="optimize_joins-20"><a href="#optimize_joins-20"><span class="linenos">20</span></a> +</span><span id="optimize_joins-21"><a href="#optimize_joins-21"><span class="linenos">21</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[]):</span> +</span><span id="optimize_joins-22"><a href="#optimize_joins-22"><span class="linenos">22</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="optimize_joins-23"><a href="#optimize_joins-23"><span class="linenos">23</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="optimize_joins-24"><a href="#optimize_joins-24"><span class="linenos">24</span></a> +</span><span id="optimize_joins-25"><a href="#optimize_joins-25"><span class="linenos">25</span></a> <span class="k">if</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="optimize_joins-26"><a href="#optimize_joins-26"><span class="linenos">26</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="optimize_joins-27"><a href="#optimize_joins-27"><span class="linenos">27</span></a> <span class="n">references</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="p">[])</span> <span class="o">+</span> <span class="p">[</span><span class="n">join</span><span class="p">]</span> +</span><span id="optimize_joins-28"><a href="#optimize_joins-28"><span class="linenos">28</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="optimize_joins-29"><a href="#optimize_joins-29"><span class="linenos">29</span></a> <span class="n">cross_joins</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">join</span><span class="p">))</span> +</span><span id="optimize_joins-30"><a href="#optimize_joins-30"><span class="linenos">30</span></a> +</span><span id="optimize_joins-31"><a href="#optimize_joins-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">cross_joins</span><span class="p">:</span> +</span><span id="optimize_joins-32"><a href="#optimize_joins-32"><span class="linenos">32</span></a> <span class="k">for</span> <span class="n">dep</span> <span class="ow">in</span> <span class="n">references</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="p">[]):</span> +</span><span id="optimize_joins-33"><a href="#optimize_joins-33"><span class="linenos">33</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">dep</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"on"</span><span class="p">]</span> +</span><span id="optimize_joins-34"><a href="#optimize_joins-34"><span class="linenos">34</span></a> +</span><span id="optimize_joins-35"><a href="#optimize_joins-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">on</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="optimize_joins-36"><a href="#optimize_joins-36"><span class="linenos">36</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">flatten</span><span class="p">():</span> +</span><span id="optimize_joins-37"><a href="#optimize_joins-37"><span class="linenos">37</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">):</span> +</span><span id="optimize_joins-38"><a href="#optimize_joins-38"><span class="linenos">38</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="optimize_joins-39"><a href="#optimize_joins-39"><span class="linenos">39</span></a> <span class="n">join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="optimize_joins-40"><a href="#optimize_joins-40"><span class="linenos">40</span></a> +</span><span id="optimize_joins-41"><a href="#optimize_joins-41"><span class="linenos">41</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="optimize_joins-42"><a href="#optimize_joins-42"><span class="linenos">42</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="optimize_joins-43"><a href="#optimize_joins-43"><span class="linenos">43</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -224,24 +229,24 @@ </div> <a class="headerlink" href="#reorder_joins"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="reorder_joins-44"><a href="#reorder_joins-44"><span class="linenos">44</span></a><span class="k">def</span> <span class="nf">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="reorder_joins-45"><a href="#reorder_joins-45"><span class="linenos">45</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="reorder_joins-46"><a href="#reorder_joins-46"><span class="linenos">46</span></a><span class="sd"> Reorder joins by topological sort order based on predicate references.</span> -</span><span id="reorder_joins-47"><a href="#reorder_joins-47"><span class="linenos">47</span></a><span class="sd"> """</span> -</span><span id="reorder_joins-48"><a href="#reorder_joins-48"><span class="linenos">48</span></a> <span class="k">for</span> <span class="n">from_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> -</span><span id="reorder_joins-49"><a href="#reorder_joins-49"><span class="linenos">49</span></a> <span class="n">head</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="reorder_joins-50"><a href="#reorder_joins-50"><span class="linenos">50</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">parent</span> -</span><span id="reorder_joins-51"><a href="#reorder_joins-51"><span class="linenos">51</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">parent</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])}</span> -</span><span id="reorder_joins-52"><a href="#reorder_joins-52"><span class="linenos">52</span></a> <span class="n">dag</span> <span class="o">=</span> <span class="p">{</span><span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="p">[]}</span> -</span><span id="reorder_joins-53"><a href="#reorder_joins-53"><span class="linenos">53</span></a> -</span><span id="reorder_joins-54"><a href="#reorder_joins-54"><span class="linenos">54</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="reorder_joins-55"><a href="#reorder_joins-55"><span class="linenos">55</span></a> <span class="n">dag</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="reorder_joins-56"><a href="#reorder_joins-56"><span class="linenos">56</span></a> -</span><span id="reorder_joins-57"><a href="#reorder_joins-57"><span class="linenos">57</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> -</span><span id="reorder_joins-58"><a href="#reorder_joins-58"><span class="linenos">58</span></a> <span class="s2">"joins"</span><span class="p">,</span> -</span><span id="reorder_joins-59"><a href="#reorder_joins-59"><span class="linenos">59</span></a> <span class="p">[</span><span class="n">joins</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">tsort</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">],</span> -</span><span id="reorder_joins-60"><a href="#reorder_joins-60"><span class="linenos">60</span></a> <span class="p">)</span> -</span><span id="reorder_joins-61"><a href="#reorder_joins-61"><span class="linenos">61</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="reorder_joins-46"><a href="#reorder_joins-46"><span class="linenos">46</span></a><span class="k">def</span> <span class="nf">reorder_joins</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="reorder_joins-47"><a href="#reorder_joins-47"><span class="linenos">47</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="reorder_joins-48"><a href="#reorder_joins-48"><span class="linenos">48</span></a><span class="sd"> Reorder joins by topological sort order based on predicate references.</span> +</span><span id="reorder_joins-49"><a href="#reorder_joins-49"><span class="linenos">49</span></a><span class="sd"> """</span> +</span><span id="reorder_joins-50"><a href="#reorder_joins-50"><span class="linenos">50</span></a> <span class="k">for</span> <span class="n">from_</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> +</span><span id="reorder_joins-51"><a href="#reorder_joins-51"><span class="linenos">51</span></a> <span class="n">head</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">this</span> +</span><span id="reorder_joins-52"><a href="#reorder_joins-52"><span class="linenos">52</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">from_</span><span class="o">.</span><span class="n">parent</span> +</span><span id="reorder_joins-53"><a href="#reorder_joins-53"><span class="linenos">53</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">join</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">parent</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])}</span> +</span><span id="reorder_joins-54"><a href="#reorder_joins-54"><span class="linenos">54</span></a> <span class="n">dag</span> <span class="o">=</span> <span class="p">{</span><span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="p">[]}</span> +</span><span id="reorder_joins-55"><a href="#reorder_joins-55"><span class="linenos">55</span></a> +</span><span id="reorder_joins-56"><a href="#reorder_joins-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="reorder_joins-57"><a href="#reorder_joins-57"><span class="linenos">57</span></a> <span class="n">dag</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="reorder_joins-58"><a href="#reorder_joins-58"><span class="linenos">58</span></a> +</span><span id="reorder_joins-59"><a href="#reorder_joins-59"><span class="linenos">59</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span> +</span><span id="reorder_joins-60"><a href="#reorder_joins-60"><span class="linenos">60</span></a> <span class="s2">"joins"</span><span class="p">,</span> +</span><span id="reorder_joins-61"><a href="#reorder_joins-61"><span class="linenos">61</span></a> <span class="p">[</span><span class="n">joins</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">tsort</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">head</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">],</span> +</span><span id="reorder_joins-62"><a href="#reorder_joins-62"><span class="linenos">62</span></a> <span class="p">)</span> +</span><span id="reorder_joins-63"><a href="#reorder_joins-63"><span class="linenos">63</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -261,14 +266,17 @@ </div> <a class="headerlink" href="#normalize"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="normalize-64"><a href="#normalize-64"><span class="linenos">64</span></a><span class="k">def</span> <span class="nf">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="normalize-65"><a href="#normalize-65"><span class="linenos">65</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="normalize-66"><a href="#normalize-66"><span class="linenos">66</span></a><span class="sd"> Remove INNER and OUTER from joins as they are optional.</span> -</span><span id="normalize-67"><a href="#normalize-67"><span class="linenos">67</span></a><span class="sd"> """</span> -</span><span id="normalize-68"><a href="#normalize-68"><span class="linenos">68</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="normalize-69"><a href="#normalize-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">!=</span> <span class="s2">"CROSS"</span><span class="p">:</span> -</span><span id="normalize-70"><a href="#normalize-70"><span class="linenos">70</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="normalize-71"><a href="#normalize-71"><span class="linenos">71</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="normalize-66"><a href="#normalize-66"><span class="linenos">66</span></a><span class="k">def</span> <span class="nf">normalize</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="normalize-67"><a href="#normalize-67"><span class="linenos">67</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="normalize-68"><a href="#normalize-68"><span class="linenos">68</span></a><span class="sd"> Remove INNER and OUTER from joins as they are optional.</span> +</span><span id="normalize-69"><a href="#normalize-69"><span class="linenos">69</span></a><span class="sd"> """</span> +</span><span id="normalize-70"><a href="#normalize-70"><span class="linenos">70</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="normalize-71"><a href="#normalize-71"><span class="linenos">71</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">JOIN_ATTRS</span><span class="p">):</span> +</span><span id="normalize-72"><a href="#normalize-72"><span class="linenos">72</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> +</span><span id="normalize-73"><a href="#normalize-73"><span class="linenos">73</span></a> +</span><span id="normalize-74"><a href="#normalize-74"><span class="linenos">74</span></a> <span class="k">if</span> <span class="n">join</span><span class="o">.</span><span class="n">kind</span> <span class="o">!=</span> <span class="s2">"CROSS"</span><span class="p">:</span> +</span><span id="normalize-75"><a href="#normalize-75"><span class="linenos">75</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="normalize-76"><a href="#normalize-76"><span class="linenos">76</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -288,12 +296,12 @@ </div> <a class="headerlink" href="#other_table_names"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="other_table_names-74"><a href="#other_table_names-74"><span class="linenos">74</span></a><span class="k">def</span> <span class="nf">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">exclude</span><span class="p">):</span> -</span><span id="other_table_names-75"><a href="#other_table_names-75"><span class="linenos">75</span></a> <span class="k">return</span> <span class="p">[</span> -</span><span id="other_table_names-76"><a href="#other_table_names-76"><span class="linenos">76</span></a> <span class="n">name</span> -</span><span id="other_table_names-77"><a href="#other_table_names-77"><span class="linenos">77</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()))</span> -</span><span id="other_table_names-78"><a href="#other_table_names-78"><span class="linenos">78</span></a> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">exclude</span> -</span><span id="other_table_names-79"><a href="#other_table_names-79"><span class="linenos">79</span></a> <span class="p">]</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="other_table_names-79"><a href="#other_table_names-79"><span class="linenos">79</span></a><span class="k">def</span> <span class="nf">other_table_names</span><span class="p">(</span><span class="n">join</span><span class="p">,</span> <span class="n">exclude</span><span class="p">):</span> +</span><span id="other_table_names-80"><a href="#other_table_names-80"><span class="linenos">80</span></a> <span class="k">return</span> <span class="p">[</span> +</span><span id="other_table_names-81"><a href="#other_table_names-81"><span class="linenos">81</span></a> <span class="n">name</span> +</span><span id="other_table_names-82"><a href="#other_table_names-82"><span class="linenos">82</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()))</span> +</span><span id="other_table_names-83"><a href="#other_table_names-83"><span class="linenos">83</span></a> <span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="n">exclude</span> +</span><span id="other_table_names-84"><a href="#other_table_names-84"><span class="linenos">84</span></a> <span class="p">]</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/optimizer.html b/docs/sqlglot/optimizer/optimizer.html index 378281d..2106e43 100644 --- a/docs/sqlglot/optimizer/optimizer.html +++ b/docs/sqlglot/optimizer/optimizer.html @@ -68,84 +68,84 @@ </span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.eliminate_ctes</span> <span class="kn">import</span> <span class="n">eliminate_ctes</span> </span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.eliminate_joins</span> <span class="kn">import</span> <span class="n">eliminate_joins</span> </span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.eliminate_subqueries</span> <span class="kn">import</span> <span class="n">eliminate_subqueries</span> -</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.expand_multi_table_selects</span> <span class="kn">import</span> <span class="n">expand_multi_table_selects</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.isolate_table_selects</span> <span class="kn">import</span> <span class="n">isolate_table_selects</span> -</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.lower_identities</span> <span class="kn">import</span> <span class="n">lower_identities</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.merge_subqueries</span> <span class="kn">import</span> <span class="n">merge_subqueries</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.normalize</span> <span class="kn">import</span> <span class="n">normalize</span> -</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.optimize_joins</span> <span class="kn">import</span> <span class="n">optimize_joins</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.pushdown_predicates</span> <span class="kn">import</span> <span class="n">pushdown_predicates</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.pushdown_projections</span> <span class="kn">import</span> <span class="n">pushdown_projections</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_columns</span> <span class="kn">import</span> <span class="n">qualify_columns</span><span class="p">,</span> <span class="n">validate_qualify_columns</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_tables</span> <span class="kn">import</span> <span class="n">qualify_tables</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.simplify</span> <span class="kn">import</span> <span class="n">simplify</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.unnest_subqueries</span> <span class="kn">import</span> <span class="n">unnest_subqueries</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">ensure_schema</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> -</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a><span class="n">RULES</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">lower_identities</span><span class="p">,</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="n">qualify_tables</span><span class="p">,</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="n">isolate_table_selects</span><span class="p">,</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="n">qualify_columns</span><span class="p">,</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="n">pushdown_projections</span><span class="p">,</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="n">validate_qualify_columns</span><span class="p">,</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">normalize</span><span class="p">,</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">unnest_subqueries</span><span class="p">,</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="n">expand_multi_table_selects</span><span class="p">,</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="n">pushdown_predicates</span><span class="p">,</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="n">optimize_joins</span><span class="p">,</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="n">eliminate_subqueries</span><span class="p">,</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="n">merge_subqueries</span><span class="p">,</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">eliminate_joins</span><span class="p">,</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="n">eliminate_ctes</span><span class="p">,</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">annotate_types</span><span class="p">,</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> <span class="n">canonicalize</span><span class="p">,</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="n">simplify</span><span class="p">,</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a><span class="p">)</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> -</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> -</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a><span class="k">def</span> <span class="nf">optimize</span><span class="p">(</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="n">db</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="n">catalog</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="n">rules</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="n">RULES</span><span class="p">,</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a><span class="p">):</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a><span class="sd"> Rewrite a sqlglot AST into an optimized form.</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> -</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a><span class="sd"> Args:</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a><span class="sd"> expression: expression to optimize</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a><span class="sd"> schema: database schema.</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a><span class="sd"> This can either be an instance of `sqlglot.optimizer.Schema` or a mapping in one of</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a><span class="sd"> the following forms:</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a><span class="sd"> 1. {table: {col: type}}</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a><span class="sd"> If no schema is provided then the default schema defined at `sqlgot.schema` will be used</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a><span class="sd"> db: specify the default database, as might be set by a `USE DATABASE db` statement</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a><span class="sd"> catalog: specify the default catalog, as might be set by a `USE CATALOG c` statement</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a><span class="sd"> dialect: The dialect to parse the sql string.</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a><span class="sd"> rules: sequence of optimizer rules to use.</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a><span class="sd"> Many of the rules require tables and columns to be qualified.</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a><span class="sd"> Do not remove qualify_tables or qualify_columns from the sequence of rules unless you know</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a><span class="sd"> what you're doing!</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a><span class="sd"> **kwargs: If a rule has a keyword argument with a same name in **kwargs, it will be passed in.</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a><span class="sd"> Returns:</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos">79</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos">80</span></a><span class="sd"> """</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos">81</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">)</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos">82</span></a> <span class="n">possible_kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"db"</span><span class="p">:</span> <span class="n">db</span><span class="p">,</span> <span class="s2">"catalog"</span><span class="p">:</span> <span class="n">catalog</span><span class="p">,</span> <span class="s2">"schema"</span><span class="p">:</span> <span class="n">schema</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">}</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos">83</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos">84</span></a> <span class="k">for</span> <span class="n">rule</span> <span class="ow">in</span> <span class="n">rules</span><span class="p">:</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos">85</span></a> <span class="c1"># Find any additional rule parameters, beyond `expression`</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos">86</span></a> <span class="n">rule_params</span> <span class="o">=</span> <span class="n">rule</span><span class="o">.</span><span class="vm">__code__</span><span class="o">.</span><span class="n">co_varnames</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos">87</span></a> <span class="n">rule_kwargs</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos">88</span></a> <span class="n">param</span><span class="p">:</span> <span class="n">possible_kwargs</span><span class="p">[</span><span class="n">param</span><span class="p">]</span> <span class="k">for</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">rule_params</span> <span class="k">if</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">possible_kwargs</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos">89</span></a> <span class="p">}</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos">90</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">rule</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="o">**</span><span class="n">rule_kwargs</span><span class="p">)</span> +</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.isolate_table_selects</span> <span class="kn">import</span> <span class="n">isolate_table_selects</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.lower_identities</span> <span class="kn">import</span> <span class="n">lower_identities</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.merge_subqueries</span> <span class="kn">import</span> <span class="n">merge_subqueries</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.normalize</span> <span class="kn">import</span> <span class="n">normalize</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.optimize_joins</span> <span class="kn">import</span> <span class="n">optimize_joins</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.pushdown_predicates</span> <span class="kn">import</span> <span class="n">pushdown_predicates</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.pushdown_projections</span> <span class="kn">import</span> <span class="n">pushdown_projections</span> +</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_columns</span> <span class="kn">import</span> <span class="n">qualify_columns</span><span class="p">,</span> <span class="n">validate_qualify_columns</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.qualify_tables</span> <span class="kn">import</span> <span class="n">qualify_tables</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.simplify</span> <span class="kn">import</span> <span class="n">simplify</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.unnest_subqueries</span> <span class="kn">import</span> <span class="n">unnest_subqueries</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">ensure_schema</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a> +</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a><span class="n">RULES</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> <span class="n">lower_identities</span><span class="p">,</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">qualify_tables</span><span class="p">,</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> <span class="n">isolate_table_selects</span><span class="p">,</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="n">qualify_columns</span><span class="p">,</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="n">pushdown_projections</span><span class="p">,</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="n">validate_qualify_columns</span><span class="p">,</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="n">normalize</span><span class="p">,</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">unnest_subqueries</span><span class="p">,</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">pushdown_predicates</span><span class="p">,</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="n">optimize_joins</span><span class="p">,</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="n">eliminate_subqueries</span><span class="p">,</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="n">merge_subqueries</span><span class="p">,</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="n">eliminate_joins</span><span class="p">,</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="n">eliminate_ctes</span><span class="p">,</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">annotate_types</span><span class="p">,</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="n">canonicalize</span><span class="p">,</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">simplify</span><span class="p">,</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a><span class="p">)</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> +</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> +</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a><span class="k">def</span> <span class="nf">optimize</span><span class="p">(</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">db</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">catalog</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="n">rules</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="n">RULES</span><span class="p">,</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a><span class="p">):</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a><span class="sd"> Rewrite a sqlglot AST into an optimized form.</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> +</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a><span class="sd"> Args:</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a><span class="sd"> expression: expression to optimize</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a><span class="sd"> schema: database schema.</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a><span class="sd"> This can either be an instance of `sqlglot.optimizer.Schema` or a mapping in one of</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a><span class="sd"> the following forms:</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a><span class="sd"> 1. {table: {col: type}}</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a><span class="sd"> If no schema is provided then the default schema defined at `sqlgot.schema` will be used</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a><span class="sd"> db: specify the default database, as might be set by a `USE DATABASE db` statement</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a><span class="sd"> catalog: specify the default catalog, as might be set by a `USE CATALOG c` statement</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a><span class="sd"> dialect: The dialect to parse the sql string.</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a><span class="sd"> rules: sequence of optimizer rules to use.</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a><span class="sd"> Many of the rules require tables and columns to be qualified.</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a><span class="sd"> Do not remove qualify_tables or qualify_columns from the sequence of rules unless you know</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a><span class="sd"> what you're doing!</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a><span class="sd"> **kwargs: If a rule has a keyword argument with a same name in **kwargs, it will be passed in.</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a><span class="sd"> Returns:</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a><span class="sd"> """</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos">79</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">)</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos">80</span></a> <span class="n">possible_kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"db"</span><span class="p">:</span> <span class="n">db</span><span class="p">,</span> <span class="s2">"catalog"</span><span class="p">:</span> <span class="n">catalog</span><span class="p">,</span> <span class="s2">"schema"</span><span class="p">:</span> <span class="n">schema</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">}</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos">81</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos">82</span></a> +</span><span id="L-83"><a href="#L-83"><span class="linenos">83</span></a> <span class="k">for</span> <span class="n">rule</span> <span class="ow">in</span> <span class="n">rules</span><span class="p">:</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos">84</span></a> <span class="c1"># Find any additional rule parameters, beyond `expression`</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos">85</span></a> <span class="n">rule_params</span> <span class="o">=</span> <span class="n">rule</span><span class="o">.</span><span class="vm">__code__</span><span class="o">.</span><span class="n">co_varnames</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos">86</span></a> <span class="n">rule_kwargs</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos">87</span></a> <span class="n">param</span><span class="p">:</span> <span class="n">possible_kwargs</span><span class="p">[</span><span class="n">param</span><span class="p">]</span> <span class="k">for</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">rule_params</span> <span class="k">if</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">possible_kwargs</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos">88</span></a> <span class="p">}</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos">89</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">rule</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="o">**</span><span class="n">rule_kwargs</span><span class="p">)</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos">90</span></a> </span><span id="L-91"><a href="#L-91"><span class="linenos">91</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -156,54 +156,56 @@ <div class="attr function"> <span class="def">def</span> - <span class="name">optimize</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span>,</span><span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">dict</span><span class="p">,</span> <span class="n"><a href="../schema.html#Schema">sqlglot.schema.Schema</a></span><span class="p">,</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">db</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">catalog</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">dialect</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n"><a href="../dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">,</span> <span class="n">Type</span><span class="p">[</span><span class="n"><a href="../dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">],</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">rules</span><span class="p">:</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="o"><</span><span class="n">function</span> <span class="n">lower_identities</span> <span class="n">at</span> <span class="mh">0x7fc498ded5a0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">qualify_tables</span> <span class="n">at</span> <span class="mh">0x7fc498defd00</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">isolate_table_selects</span> <span class="n">at</span> <span class="mh">0x7fc498ded480</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">qualify_columns</span> <span class="n">at</span> <span class="mh">0x7fc498deeb90</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">pushdown_projections</span> <span class="n">at</span> <span class="mh">0x7fc498def6d0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">validate_qualify_columns</span> <span class="n">at</span> <span class="mh">0x7fc498def010</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">normalize</span> <span class="n">at</span> <span class="mh">0x7fc498dc71c0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">unnest_subqueries</span> <span class="n">at</span> <span class="mh">0x7fc498defe20</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">expand_multi_table_selects</span> <span class="n">at</span> <span class="mh">0x7fc498ded3f0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">pushdown_predicates</span> <span class="n">at</span> <span class="mh">0x7fc498dee710</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">optimize_joins</span> <span class="n">at</span> <span class="mh">0x7fc498dee320</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_subqueries</span> <span class="n">at</span> <span class="mh">0x7fc498ded000</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">merge_subqueries</span> <span class="n">at</span> <span class="mh">0x7fc498ded870</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_joins</span> <span class="n">at</span> <span class="mh">0x7fc498dc6f80</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_ctes</span> <span class="n">at</span> <span class="mh">0x7fc498dc6e60</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">annotate_types</span> <span class="n">at</span> <span class="mh">0x7fc498d935b0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">canonicalize</span> <span class="n">at</span> <span class="mh">0x7fc498dc68c0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">simplify</span> <span class="n">at</span> <span class="mh">0x7fc498dc7370</span><span class="o">></span><span class="p">)</span>,</span><span class="param"> <span class="o">**</span><span class="n">kwargs</span></span><span class="return-annotation">):</span></span> + <span class="name">optimize</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span>,</span><span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">dict</span><span class="p">,</span> <span class="n"><a href="../schema.html#Schema">sqlglot.schema.Schema</a></span><span class="p">,</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">db</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">catalog</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">dialect</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n"><a href="../dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">,</span> <span class="n">Type</span><span class="p">[</span><span class="n"><a href="../dialects/dialect.html#Dialect">sqlglot.dialects.dialect.Dialect</a></span><span class="p">],</span> <span class="n">NoneType</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span>,</span><span class="param"> <span class="n">rules</span><span class="p">:</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="o"><</span><span class="n">function</span> <span class="n">lower_identities</span> <span class="n">at</span> <span class="mh">0x7f0af2fc76d0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">qualify_tables</span> <span class="n">at</span> <span class="mh">0x7f0af2fa1d80</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">isolate_table_selects</span> <span class="n">at</span> <span class="mh">0x7f0af2fc7370</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">qualify_columns</span> <span class="n">at</span> <span class="mh">0x7f0af2fa0c10</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">pushdown_projections</span> <span class="n">at</span> <span class="mh">0x7f0af2fa1750</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">validate_qualify_columns</span> <span class="n">at</span> <span class="mh">0x7f0af2fa0ca0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">normalize</span> <span class="n">at</span> <span class="mh">0x7f0af2fc5630</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">unnest_subqueries</span> <span class="n">at</span> <span class="mh">0x7f0af2fa1e10</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">pushdown_predicates</span> <span class="n">at</span> <span class="mh">0x7f0af2fa0700</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">optimize_joins</span> <span class="n">at</span> <span class="mh">0x7f0af2fa03a0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_subqueries</span> <span class="n">at</span> <span class="mh">0x7f0af2fc72e0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">merge_subqueries</span> <span class="n">at</span> <span class="mh">0x7f0af2fc79a0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_joins</span> <span class="n">at</span> <span class="mh">0x7f0af2fc53f0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">eliminate_ctes</span> <span class="n">at</span> <span class="mh">0x7f0af2fc52d0</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">annotate_types</span> <span class="n">at</span> <span class="mh">0x7f0af2ff9a20</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">canonicalize</span> <span class="n">at</span> <span class="mh">0x7f0af2fc4d30</span><span class="o">></span><span class="p">,</span> <span class="o"><</span><span class="n">function</span> <span class="n">simplify</span> <span class="n">at</span> <span class="mh">0x7f0af2fc57e0</span><span class="o">></span><span class="p">)</span>,</span><span class="param"> <span class="o">**</span><span class="n">kwargs</span></span><span class="return-annotation">):</span></span> <label class="view-source-button" for="optimize-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#optimize"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="optimize-50"><a href="#optimize-50"><span class="linenos">50</span></a><span class="k">def</span> <span class="nf">optimize</span><span class="p">(</span> -</span><span id="optimize-51"><a href="#optimize-51"><span class="linenos">51</span></a> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> -</span><span id="optimize-52"><a href="#optimize-52"><span class="linenos">52</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="optimize-53"><a href="#optimize-53"><span class="linenos">53</span></a> <span class="n">db</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="optimize-54"><a href="#optimize-54"><span class="linenos">54</span></a> <span class="n">catalog</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="optimize-55"><a href="#optimize-55"><span class="linenos">55</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> -</span><span id="optimize-56"><a href="#optimize-56"><span class="linenos">56</span></a> <span class="n">rules</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="n">RULES</span><span class="p">,</span> -</span><span id="optimize-57"><a href="#optimize-57"><span class="linenos">57</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> -</span><span id="optimize-58"><a href="#optimize-58"><span class="linenos">58</span></a><span class="p">):</span> -</span><span id="optimize-59"><a href="#optimize-59"><span class="linenos">59</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="optimize-60"><a href="#optimize-60"><span class="linenos">60</span></a><span class="sd"> Rewrite a sqlglot AST into an optimized form.</span> -</span><span id="optimize-61"><a href="#optimize-61"><span class="linenos">61</span></a> -</span><span id="optimize-62"><a href="#optimize-62"><span class="linenos">62</span></a><span class="sd"> Args:</span> -</span><span id="optimize-63"><a href="#optimize-63"><span class="linenos">63</span></a><span class="sd"> expression: expression to optimize</span> -</span><span id="optimize-64"><a href="#optimize-64"><span class="linenos">64</span></a><span class="sd"> schema: database schema.</span> -</span><span id="optimize-65"><a href="#optimize-65"><span class="linenos">65</span></a><span class="sd"> This can either be an instance of `sqlglot.optimizer.Schema` or a mapping in one of</span> -</span><span id="optimize-66"><a href="#optimize-66"><span class="linenos">66</span></a><span class="sd"> the following forms:</span> -</span><span id="optimize-67"><a href="#optimize-67"><span class="linenos">67</span></a><span class="sd"> 1. {table: {col: type}}</span> -</span><span id="optimize-68"><a href="#optimize-68"><span class="linenos">68</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> -</span><span id="optimize-69"><a href="#optimize-69"><span class="linenos">69</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> -</span><span id="optimize-70"><a href="#optimize-70"><span class="linenos">70</span></a><span class="sd"> If no schema is provided then the default schema defined at `sqlgot.schema` will be used</span> -</span><span id="optimize-71"><a href="#optimize-71"><span class="linenos">71</span></a><span class="sd"> db: specify the default database, as might be set by a `USE DATABASE db` statement</span> -</span><span id="optimize-72"><a href="#optimize-72"><span class="linenos">72</span></a><span class="sd"> catalog: specify the default catalog, as might be set by a `USE CATALOG c` statement</span> -</span><span id="optimize-73"><a href="#optimize-73"><span class="linenos">73</span></a><span class="sd"> dialect: The dialect to parse the sql string.</span> -</span><span id="optimize-74"><a href="#optimize-74"><span class="linenos">74</span></a><span class="sd"> rules: sequence of optimizer rules to use.</span> -</span><span id="optimize-75"><a href="#optimize-75"><span class="linenos">75</span></a><span class="sd"> Many of the rules require tables and columns to be qualified.</span> -</span><span id="optimize-76"><a href="#optimize-76"><span class="linenos">76</span></a><span class="sd"> Do not remove qualify_tables or qualify_columns from the sequence of rules unless you know</span> -</span><span id="optimize-77"><a href="#optimize-77"><span class="linenos">77</span></a><span class="sd"> what you're doing!</span> -</span><span id="optimize-78"><a href="#optimize-78"><span class="linenos">78</span></a><span class="sd"> **kwargs: If a rule has a keyword argument with a same name in **kwargs, it will be passed in.</span> -</span><span id="optimize-79"><a href="#optimize-79"><span class="linenos">79</span></a><span class="sd"> Returns:</span> -</span><span id="optimize-80"><a href="#optimize-80"><span class="linenos">80</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> -</span><span id="optimize-81"><a href="#optimize-81"><span class="linenos">81</span></a><span class="sd"> """</span> -</span><span id="optimize-82"><a href="#optimize-82"><span class="linenos">82</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">)</span> -</span><span id="optimize-83"><a href="#optimize-83"><span class="linenos">83</span></a> <span class="n">possible_kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"db"</span><span class="p">:</span> <span class="n">db</span><span class="p">,</span> <span class="s2">"catalog"</span><span class="p">:</span> <span class="n">catalog</span><span class="p">,</span> <span class="s2">"schema"</span><span class="p">:</span> <span class="n">schema</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">}</span> -</span><span id="optimize-84"><a href="#optimize-84"><span class="linenos">84</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="optimize-85"><a href="#optimize-85"><span class="linenos">85</span></a> <span class="k">for</span> <span class="n">rule</span> <span class="ow">in</span> <span class="n">rules</span><span class="p">:</span> -</span><span id="optimize-86"><a href="#optimize-86"><span class="linenos">86</span></a> <span class="c1"># Find any additional rule parameters, beyond `expression`</span> -</span><span id="optimize-87"><a href="#optimize-87"><span class="linenos">87</span></a> <span class="n">rule_params</span> <span class="o">=</span> <span class="n">rule</span><span class="o">.</span><span class="vm">__code__</span><span class="o">.</span><span class="n">co_varnames</span> -</span><span id="optimize-88"><a href="#optimize-88"><span class="linenos">88</span></a> <span class="n">rule_kwargs</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="optimize-89"><a href="#optimize-89"><span class="linenos">89</span></a> <span class="n">param</span><span class="p">:</span> <span class="n">possible_kwargs</span><span class="p">[</span><span class="n">param</span><span class="p">]</span> <span class="k">for</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">rule_params</span> <span class="k">if</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">possible_kwargs</span> -</span><span id="optimize-90"><a href="#optimize-90"><span class="linenos">90</span></a> <span class="p">}</span> -</span><span id="optimize-91"><a href="#optimize-91"><span class="linenos">91</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">rule</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="o">**</span><span class="n">rule_kwargs</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="optimize-48"><a href="#optimize-48"><span class="linenos">48</span></a><span class="k">def</span> <span class="nf">optimize</span><span class="p">(</span> +</span><span id="optimize-49"><a href="#optimize-49"><span class="linenos">49</span></a> <span class="n">expression</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> +</span><span id="optimize-50"><a href="#optimize-50"><span class="linenos">50</span></a> <span class="n">schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="optimize-51"><a href="#optimize-51"><span class="linenos">51</span></a> <span class="n">db</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="optimize-52"><a href="#optimize-52"><span class="linenos">52</span></a> <span class="n">catalog</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="optimize-53"><a href="#optimize-53"><span class="linenos">53</span></a> <span class="n">dialect</span><span class="p">:</span> <span class="n">DialectType</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="optimize-54"><a href="#optimize-54"><span class="linenos">54</span></a> <span class="n">rules</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Sequence</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Callable</span><span class="p">]</span> <span class="o">=</span> <span class="n">RULES</span><span class="p">,</span> +</span><span id="optimize-55"><a href="#optimize-55"><span class="linenos">55</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="optimize-56"><a href="#optimize-56"><span class="linenos">56</span></a><span class="p">):</span> +</span><span id="optimize-57"><a href="#optimize-57"><span class="linenos">57</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="optimize-58"><a href="#optimize-58"><span class="linenos">58</span></a><span class="sd"> Rewrite a sqlglot AST into an optimized form.</span> +</span><span id="optimize-59"><a href="#optimize-59"><span class="linenos">59</span></a> +</span><span id="optimize-60"><a href="#optimize-60"><span class="linenos">60</span></a><span class="sd"> Args:</span> +</span><span id="optimize-61"><a href="#optimize-61"><span class="linenos">61</span></a><span class="sd"> expression: expression to optimize</span> +</span><span id="optimize-62"><a href="#optimize-62"><span class="linenos">62</span></a><span class="sd"> schema: database schema.</span> +</span><span id="optimize-63"><a href="#optimize-63"><span class="linenos">63</span></a><span class="sd"> This can either be an instance of `sqlglot.optimizer.Schema` or a mapping in one of</span> +</span><span id="optimize-64"><a href="#optimize-64"><span class="linenos">64</span></a><span class="sd"> the following forms:</span> +</span><span id="optimize-65"><a href="#optimize-65"><span class="linenos">65</span></a><span class="sd"> 1. {table: {col: type}}</span> +</span><span id="optimize-66"><a href="#optimize-66"><span class="linenos">66</span></a><span class="sd"> 2. {db: {table: {col: type}}}</span> +</span><span id="optimize-67"><a href="#optimize-67"><span class="linenos">67</span></a><span class="sd"> 3. {catalog: {db: {table: {col: type}}}}</span> +</span><span id="optimize-68"><a href="#optimize-68"><span class="linenos">68</span></a><span class="sd"> If no schema is provided then the default schema defined at `sqlgot.schema` will be used</span> +</span><span id="optimize-69"><a href="#optimize-69"><span class="linenos">69</span></a><span class="sd"> db: specify the default database, as might be set by a `USE DATABASE db` statement</span> +</span><span id="optimize-70"><a href="#optimize-70"><span class="linenos">70</span></a><span class="sd"> catalog: specify the default catalog, as might be set by a `USE CATALOG c` statement</span> +</span><span id="optimize-71"><a href="#optimize-71"><span class="linenos">71</span></a><span class="sd"> dialect: The dialect to parse the sql string.</span> +</span><span id="optimize-72"><a href="#optimize-72"><span class="linenos">72</span></a><span class="sd"> rules: sequence of optimizer rules to use.</span> +</span><span id="optimize-73"><a href="#optimize-73"><span class="linenos">73</span></a><span class="sd"> Many of the rules require tables and columns to be qualified.</span> +</span><span id="optimize-74"><a href="#optimize-74"><span class="linenos">74</span></a><span class="sd"> Do not remove qualify_tables or qualify_columns from the sequence of rules unless you know</span> +</span><span id="optimize-75"><a href="#optimize-75"><span class="linenos">75</span></a><span class="sd"> what you're doing!</span> +</span><span id="optimize-76"><a href="#optimize-76"><span class="linenos">76</span></a><span class="sd"> **kwargs: If a rule has a keyword argument with a same name in **kwargs, it will be passed in.</span> +</span><span id="optimize-77"><a href="#optimize-77"><span class="linenos">77</span></a><span class="sd"> Returns:</span> +</span><span id="optimize-78"><a href="#optimize-78"><span class="linenos">78</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> +</span><span id="optimize-79"><a href="#optimize-79"><span class="linenos">79</span></a><span class="sd"> """</span> +</span><span id="optimize-80"><a href="#optimize-80"><span class="linenos">80</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span> <span class="ow">or</span> <span class="n">sqlglot</span><span class="o">.</span><span class="n">schema</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">)</span> +</span><span id="optimize-81"><a href="#optimize-81"><span class="linenos">81</span></a> <span class="n">possible_kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"db"</span><span class="p">:</span> <span class="n">db</span><span class="p">,</span> <span class="s2">"catalog"</span><span class="p">:</span> <span class="n">catalog</span><span class="p">,</span> <span class="s2">"schema"</span><span class="p">:</span> <span class="n">schema</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">}</span> +</span><span id="optimize-82"><a href="#optimize-82"><span class="linenos">82</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">maybe_parse</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">dialect</span><span class="o">=</span><span class="n">dialect</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="optimize-83"><a href="#optimize-83"><span class="linenos">83</span></a> +</span><span id="optimize-84"><a href="#optimize-84"><span class="linenos">84</span></a> <span class="k">for</span> <span class="n">rule</span> <span class="ow">in</span> <span class="n">rules</span><span class="p">:</span> +</span><span id="optimize-85"><a href="#optimize-85"><span class="linenos">85</span></a> <span class="c1"># Find any additional rule parameters, beyond `expression`</span> +</span><span id="optimize-86"><a href="#optimize-86"><span class="linenos">86</span></a> <span class="n">rule_params</span> <span class="o">=</span> <span class="n">rule</span><span class="o">.</span><span class="vm">__code__</span><span class="o">.</span><span class="n">co_varnames</span> +</span><span id="optimize-87"><a href="#optimize-87"><span class="linenos">87</span></a> <span class="n">rule_kwargs</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="optimize-88"><a href="#optimize-88"><span class="linenos">88</span></a> <span class="n">param</span><span class="p">:</span> <span class="n">possible_kwargs</span><span class="p">[</span><span class="n">param</span><span class="p">]</span> <span class="k">for</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">rule_params</span> <span class="k">if</span> <span class="n">param</span> <span class="ow">in</span> <span class="n">possible_kwargs</span> +</span><span id="optimize-89"><a href="#optimize-89"><span class="linenos">89</span></a> <span class="p">}</span> +</span><span id="optimize-90"><a href="#optimize-90"><span class="linenos">90</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">rule</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="o">**</span><span class="n">rule_kwargs</span><span class="p">)</span> +</span><span id="optimize-91"><a href="#optimize-91"><span class="linenos">91</span></a> </span><span id="optimize-92"><a href="#optimize-92"><span class="linenos">92</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/pushdown_predicates.html b/docs/sqlglot/optimizer/pushdown_predicates.html index 4870176..67fac86 100644 --- a/docs/sqlglot/optimizer/pushdown_predicates.html +++ b/docs/sqlglot/optimizer/pushdown_predicates.html @@ -94,180 +94,182 @@ </span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> </span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> """</span> </span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> -</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="k">if</span> <span class="n">where</span><span class="p">:</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="c1"># a right join can only push down to itself and not the source FROM table</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> <span class="ow">and</span> <span class="n">parent</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"RIGHT"</span><span class="p">:</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)}</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="k">break</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">selected_sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="c1"># joins should only pushdown into itself, not to other joins</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="c1"># so we limit the selected sources to only itself</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="p">{</span><span class="n">name</span><span class="p">:</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">name</span><span class="p">]},</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="k">if</span> <span class="n">where</span><span class="p">:</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="c1"># a right join can only push down to itself and not the source FROM table</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> <span class="ow">and</span> <span class="n">parent</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"RIGHT"</span><span class="p">:</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)}</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="k">break</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">selected_sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="c1"># joins should only pushdown into itself, not to other joins</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="c1"># so we limit the selected sources to only itself</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="p">{</span><span class="n">name</span><span class="p">:</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">name</span><span class="p">]},</span> <span class="n">scope_ref_count</span><span class="p">)</span> </span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="k">def</span> <span class="nf">pushdown</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">condition</span><span class="p">:</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">return</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">condition</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">simplify</span><span class="p">(</span><span class="n">condition</span><span class="p">))</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">cnf_like</span> <span class="o">=</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">predicates</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">condition</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">cnf_like</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">else</span> <span class="p">[</span><span class="n">condition</span><span class="p">]</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="p">)</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">if</span> <span class="n">cnf_like</span><span class="p">:</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a><span class="k">def</span> <span class="nf">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a><span class="sd"> If the predicates are in CNF like form, we can simply replace each block in the parent.</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="sd"> """</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">break</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a><span class="k">def</span> <span class="nf">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="sd"> If the predicates are in DNF form, we can only push down conditions that are in all blocks.</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="sd"> Additionally, we can't remove predicates from their original form.</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a><span class="sd"> """</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="c1"># find all the tables that can be pushdown too</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="c1"># these are tables that are referenced in all blocks of a DNF</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="c1"># (a.x AND b.x) OR (a.y AND c.y)</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="c1"># only table a can be push down</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">pushdown_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">a_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">a</span><span class="p">))</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">a_tables</span> <span class="o">&=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">b</span><span class="p">))</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">pushdown_tables</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">a_tables</span><span class="p">)</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a><span class="k">def</span> <span class="nf">pushdown</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">condition</span><span class="p">:</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">return</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">condition</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">simplify</span><span class="p">(</span><span class="n">condition</span><span class="p">))</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">cnf_like</span> <span class="o">=</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">predicates</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">condition</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">cnf_like</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">else</span> <span class="p">[</span><span class="n">condition</span><span class="p">]</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="p">)</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">if</span> <span class="n">cnf_like</span><span class="p">:</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a><span class="k">def</span> <span class="nf">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a><span class="sd"> If the predicates are in CNF like form, we can simply replace each block in the parent.</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="sd"> """</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">break</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="k">def</span> <span class="nf">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a><span class="sd"> If the predicates are in DNF form, we can only push down conditions that are in all blocks.</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a><span class="sd"> Additionally, we can't remove predicates from their original form.</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a><span class="sd"> """</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="c1"># find all the tables that can be pushdown too</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="c1"># these are tables that are referenced in all blocks of a DNF</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="c1"># (a.x AND b.x) OR (a.y AND c.y)</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="c1"># only table a can be push down</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">pushdown_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">a_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">a</span><span class="p">))</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">a_tables</span> <span class="o">&=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">b</span><span class="p">))</span> </span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">pushdown_tables</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">a_tables</span><span class="p">)</span> </span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="c1"># for every pushdown table, find all related conditions in all predicates</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="c1"># combine them with ORS</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="c1"># (a.x AND and a.y AND b.x) OR (a.z AND c.y) -> (a.x AND a.y) OR (a.z)</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">pushdown_tables</span><span class="p">):</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">nodes</span><span class="p">:</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">continue</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="c1"># for every pushdown table, find all related conditions in all predicates</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="c1"># combine them with ORS</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="c1"># (a.x AND and a.y AND b.x) OR (a.z AND c.y) -> (a.x AND a.y) OR (a.z)</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">pushdown_tables</span><span class="p">):</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">nodes</span><span class="p">:</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">continue</span> </span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">predicate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">table</span><span class="p">:</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">)</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">predicate_condition</span><span class="p">,</span> <span class="n">condition</span><span class="p">)</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">predicate_condition</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">else</span> <span class="n">condition</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="p">)</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="n">predicate_condition</span><span class="p">:</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span><span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">],</span> <span class="n">predicate_condition</span><span class="p">)</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">conditions</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">else</span> <span class="n">predicate_condition</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="p">)</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">conditions</span><span class="p">:</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">continue</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">conditions</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">predicate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">table</span><span class="p">:</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">)</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">predicate_condition</span><span class="p">,</span> <span class="n">condition</span><span class="p">)</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">predicate_condition</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">else</span> <span class="n">condition</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="p">)</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">predicate_condition</span><span class="p">:</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span><span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">],</span> <span class="n">predicate_condition</span><span class="p">)</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">conditions</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">else</span> <span class="n">predicate_condition</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="p">)</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">conditions</span><span class="p">:</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">continue</span> </span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="k">def</span> <span class="nf">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="n">where_condition</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">)</span> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">source</span> <span class="o">=</span> <span class="n">sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="c1"># if the predicate is in a where statement we can try to push it down</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="c1"># we want to find the root join or from statement</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">where_condition</span><span class="p">:</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="c1"># a node can reference a CTE which should be pushed down</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">if</span> <span class="n">with_</span> <span class="ow">and</span> <span class="n">with_</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="k">return</span> <span class="p">{}</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="o">!=</span> <span class="s2">"RIGHT"</span><span class="p">:</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">return</span> <span class="p">{}</span> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="c1"># We can't push down window expressions</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">has_window_expression</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="n">select</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">selects</span> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="p">)</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="c1"># we can't push down predicates to select statements if they are referenced in</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="c1"># multiple places.</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="ow">and</span> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o"><</span> <span class="mi">2</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">has_window_expression</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="p">):</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">return</span> <span class="n">nodes</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a><span class="k">def</span> <span class="nf">replace_aliases</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">predicate</span><span class="p">):</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">aliases</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">def</span> <span class="nf">_replace_alias</span><span class="p">(</span><span class="n">column</span><span class="p">):</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliases</span><span class="p">:</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">return</span> <span class="n">aliases</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">return</span> <span class="n">column</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="k">return</span> <span class="n">predicate</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">_replace_alias</span><span class="p">)</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">conditions</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="k">def</span> <span class="nf">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">where_condition</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">)</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">source</span> <span class="o">=</span> <span class="n">sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="c1"># if the predicate is in a where statement we can try to push it down</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="c1"># we want to find the root join or from statement</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">where_condition</span><span class="p">:</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="c1"># a node can reference a CTE which should be pushed down</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="k">if</span> <span class="n">with_</span> <span class="ow">and</span> <span class="n">with_</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="o">!=</span> <span class="s2">"RIGHT"</span><span class="p">:</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="c1"># We can't push down window expressions</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">has_window_expression</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="n">select</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">selects</span> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="p">)</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="c1"># we can't push down predicates to select statements if they are referenced in</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="c1"># multiple places.</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="ow">and</span> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o"><</span> <span class="mi">2</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">has_window_expression</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="p">):</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">return</span> <span class="n">nodes</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a><span class="k">def</span> <span class="nf">replace_aliases</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">predicate</span><span class="p">):</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">aliases</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">def</span> <span class="nf">_replace_alias</span><span class="p">(</span><span class="n">column</span><span class="p">):</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliases</span><span class="p">:</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="k">return</span> <span class="n">aliases</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="k">return</span> <span class="n">column</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="k">return</span> <span class="n">predicate</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">_replace_alias</span><span class="p">)</span> </span></pre></div> @@ -300,28 +302,30 @@ </span><span id="pushdown_predicates-22"><a href="#pushdown_predicates-22"><span class="linenos">22</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> </span><span id="pushdown_predicates-23"><a href="#pushdown_predicates-23"><span class="linenos">23</span></a><span class="sd"> """</span> </span><span id="pushdown_predicates-24"><a href="#pushdown_predicates-24"><span class="linenos">24</span></a> <span class="n">root</span> <span class="o">=</span> <span class="n">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="pushdown_predicates-25"><a href="#pushdown_predicates-25"><span class="linenos">25</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> -</span><span id="pushdown_predicates-26"><a href="#pushdown_predicates-26"><span class="linenos">26</span></a> -</span><span id="pushdown_predicates-27"><a href="#pushdown_predicates-27"><span class="linenos">27</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> -</span><span id="pushdown_predicates-28"><a href="#pushdown_predicates-28"><span class="linenos">28</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span> -</span><span id="pushdown_predicates-29"><a href="#pushdown_predicates-29"><span class="linenos">29</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="pushdown_predicates-30"><a href="#pushdown_predicates-30"><span class="linenos">30</span></a> <span class="k">if</span> <span class="n">where</span><span class="p">:</span> -</span><span id="pushdown_predicates-31"><a href="#pushdown_predicates-31"><span class="linenos">31</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> -</span><span id="pushdown_predicates-32"><a href="#pushdown_predicates-32"><span class="linenos">32</span></a> <span class="c1"># a right join can only push down to itself and not the source FROM table</span> -</span><span id="pushdown_predicates-33"><a href="#pushdown_predicates-33"><span class="linenos">33</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="pushdown_predicates-34"><a href="#pushdown_predicates-34"><span class="linenos">34</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="pushdown_predicates-35"><a href="#pushdown_predicates-35"><span class="linenos">35</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> <span class="ow">and</span> <span class="n">parent</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"RIGHT"</span><span class="p">:</span> -</span><span id="pushdown_predicates-36"><a href="#pushdown_predicates-36"><span class="linenos">36</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)}</span> -</span><span id="pushdown_predicates-37"><a href="#pushdown_predicates-37"><span class="linenos">37</span></a> <span class="k">break</span> -</span><span id="pushdown_predicates-38"><a href="#pushdown_predicates-38"><span class="linenos">38</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">selected_sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="pushdown_predicates-39"><a href="#pushdown_predicates-39"><span class="linenos">39</span></a> -</span><span id="pushdown_predicates-40"><a href="#pushdown_predicates-40"><span class="linenos">40</span></a> <span class="c1"># joins should only pushdown into itself, not to other joins</span> -</span><span id="pushdown_predicates-41"><a href="#pushdown_predicates-41"><span class="linenos">41</span></a> <span class="c1"># so we limit the selected sources to only itself</span> -</span><span id="pushdown_predicates-42"><a href="#pushdown_predicates-42"><span class="linenos">42</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="pushdown_predicates-43"><a href="#pushdown_predicates-43"><span class="linenos">43</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="pushdown_predicates-44"><a href="#pushdown_predicates-44"><span class="linenos">44</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="p">{</span><span class="n">name</span><span class="p">:</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">name</span><span class="p">]},</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="pushdown_predicates-45"><a href="#pushdown_predicates-45"><span class="linenos">45</span></a> -</span><span id="pushdown_predicates-46"><a href="#pushdown_predicates-46"><span class="linenos">46</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="pushdown_predicates-25"><a href="#pushdown_predicates-25"><span class="linenos">25</span></a> +</span><span id="pushdown_predicates-26"><a href="#pushdown_predicates-26"><span class="linenos">26</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="pushdown_predicates-27"><a href="#pushdown_predicates-27"><span class="linenos">27</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">root</span><span class="o">.</span><span class="n">ref_count</span><span class="p">()</span> +</span><span id="pushdown_predicates-28"><a href="#pushdown_predicates-28"><span class="linenos">28</span></a> +</span><span id="pushdown_predicates-29"><a href="#pushdown_predicates-29"><span class="linenos">29</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">traverse</span><span class="p">())):</span> +</span><span id="pushdown_predicates-30"><a href="#pushdown_predicates-30"><span class="linenos">30</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span> +</span><span id="pushdown_predicates-31"><a href="#pushdown_predicates-31"><span class="linenos">31</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="pushdown_predicates-32"><a href="#pushdown_predicates-32"><span class="linenos">32</span></a> <span class="k">if</span> <span class="n">where</span><span class="p">:</span> +</span><span id="pushdown_predicates-33"><a href="#pushdown_predicates-33"><span class="linenos">33</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> +</span><span id="pushdown_predicates-34"><a href="#pushdown_predicates-34"><span class="linenos">34</span></a> <span class="c1"># a right join can only push down to itself and not the source FROM table</span> +</span><span id="pushdown_predicates-35"><a href="#pushdown_predicates-35"><span class="linenos">35</span></a> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="pushdown_predicates-36"><a href="#pushdown_predicates-36"><span class="linenos">36</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="pushdown_predicates-37"><a href="#pushdown_predicates-37"><span class="linenos">37</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> <span class="ow">and</span> <span class="n">parent</span><span class="o">.</span><span class="n">side</span> <span class="o">==</span> <span class="s2">"RIGHT"</span><span class="p">:</span> +</span><span id="pushdown_predicates-38"><a href="#pushdown_predicates-38"><span class="linenos">38</span></a> <span class="n">selected_sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source</span><span class="p">)}</span> +</span><span id="pushdown_predicates-39"><a href="#pushdown_predicates-39"><span class="linenos">39</span></a> <span class="k">break</span> +</span><span id="pushdown_predicates-40"><a href="#pushdown_predicates-40"><span class="linenos">40</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">selected_sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="pushdown_predicates-41"><a href="#pushdown_predicates-41"><span class="linenos">41</span></a> +</span><span id="pushdown_predicates-42"><a href="#pushdown_predicates-42"><span class="linenos">42</span></a> <span class="c1"># joins should only pushdown into itself, not to other joins</span> +</span><span id="pushdown_predicates-43"><a href="#pushdown_predicates-43"><span class="linenos">43</span></a> <span class="c1"># so we limit the selected sources to only itself</span> +</span><span id="pushdown_predicates-44"><a href="#pushdown_predicates-44"><span class="linenos">44</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="pushdown_predicates-45"><a href="#pushdown_predicates-45"><span class="linenos">45</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="pushdown_predicates-46"><a href="#pushdown_predicates-46"><span class="linenos">46</span></a> <span class="n">pushdown</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">),</span> <span class="p">{</span><span class="n">name</span><span class="p">:</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">name</span><span class="p">]},</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="pushdown_predicates-47"><a href="#pushdown_predicates-47"><span class="linenos">47</span></a> +</span><span id="pushdown_predicates-48"><a href="#pushdown_predicates-48"><span class="linenos">48</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -366,23 +370,23 @@ </div> <a class="headerlink" href="#pushdown"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown-49"><a href="#pushdown-49"><span class="linenos">49</span></a><span class="k">def</span> <span class="nf">pushdown</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="pushdown-50"><a href="#pushdown-50"><span class="linenos">50</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">condition</span><span class="p">:</span> -</span><span id="pushdown-51"><a href="#pushdown-51"><span class="linenos">51</span></a> <span class="k">return</span> -</span><span id="pushdown-52"><a href="#pushdown-52"><span class="linenos">52</span></a> -</span><span id="pushdown-53"><a href="#pushdown-53"><span class="linenos">53</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">condition</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">simplify</span><span class="p">(</span><span class="n">condition</span><span class="p">))</span> -</span><span id="pushdown-54"><a href="#pushdown-54"><span class="linenos">54</span></a> <span class="n">cnf_like</span> <span class="o">=</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="pushdown-55"><a href="#pushdown-55"><span class="linenos">55</span></a> -</span><span id="pushdown-56"><a href="#pushdown-56"><span class="linenos">56</span></a> <span class="n">predicates</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span> -</span><span id="pushdown-57"><a href="#pushdown-57"><span class="linenos">57</span></a> <span class="n">condition</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> -</span><span id="pushdown-58"><a href="#pushdown-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">cnf_like</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> -</span><span id="pushdown-59"><a href="#pushdown-59"><span class="linenos">59</span></a> <span class="k">else</span> <span class="p">[</span><span class="n">condition</span><span class="p">]</span> -</span><span id="pushdown-60"><a href="#pushdown-60"><span class="linenos">60</span></a> <span class="p">)</span> -</span><span id="pushdown-61"><a href="#pushdown-61"><span class="linenos">61</span></a> -</span><span id="pushdown-62"><a href="#pushdown-62"><span class="linenos">62</span></a> <span class="k">if</span> <span class="n">cnf_like</span><span class="p">:</span> -</span><span id="pushdown-63"><a href="#pushdown-63"><span class="linenos">63</span></a> <span class="n">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="pushdown-64"><a href="#pushdown-64"><span class="linenos">64</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="pushdown-65"><a href="#pushdown-65"><span class="linenos">65</span></a> <span class="n">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown-51"><a href="#pushdown-51"><span class="linenos">51</span></a><span class="k">def</span> <span class="nf">pushdown</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="pushdown-52"><a href="#pushdown-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">condition</span><span class="p">:</span> +</span><span id="pushdown-53"><a href="#pushdown-53"><span class="linenos">53</span></a> <span class="k">return</span> +</span><span id="pushdown-54"><a href="#pushdown-54"><span class="linenos">54</span></a> +</span><span id="pushdown-55"><a href="#pushdown-55"><span class="linenos">55</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">condition</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">simplify</span><span class="p">(</span><span class="n">condition</span><span class="p">))</span> +</span><span id="pushdown-56"><a href="#pushdown-56"><span class="linenos">56</span></a> <span class="n">cnf_like</span> <span class="o">=</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">normalized</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">dnf</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="pushdown-57"><a href="#pushdown-57"><span class="linenos">57</span></a> +</span><span id="pushdown-58"><a href="#pushdown-58"><span class="linenos">58</span></a> <span class="n">predicates</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span> +</span><span id="pushdown-59"><a href="#pushdown-59"><span class="linenos">59</span></a> <span class="n">condition</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> +</span><span id="pushdown-60"><a href="#pushdown-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">if</span> <span class="n">cnf_like</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">)</span> +</span><span id="pushdown-61"><a href="#pushdown-61"><span class="linenos">61</span></a> <span class="k">else</span> <span class="p">[</span><span class="n">condition</span><span class="p">]</span> +</span><span id="pushdown-62"><a href="#pushdown-62"><span class="linenos">62</span></a> <span class="p">)</span> +</span><span id="pushdown-63"><a href="#pushdown-63"><span class="linenos">63</span></a> +</span><span id="pushdown-64"><a href="#pushdown-64"><span class="linenos">64</span></a> <span class="k">if</span> <span class="n">cnf_like</span><span class="p">:</span> +</span><span id="pushdown-65"><a href="#pushdown-65"><span class="linenos">65</span></a> <span class="n">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="pushdown-66"><a href="#pushdown-66"><span class="linenos">66</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="pushdown-67"><a href="#pushdown-67"><span class="linenos">67</span></a> <span class="n">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> </span></pre></div> @@ -400,19 +404,19 @@ </div> <a class="headerlink" href="#pushdown_cnf"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_cnf-68"><a href="#pushdown_cnf-68"><span class="linenos">68</span></a><span class="k">def</span> <span class="nf">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="pushdown_cnf-69"><a href="#pushdown_cnf-69"><span class="linenos">69</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="pushdown_cnf-70"><a href="#pushdown_cnf-70"><span class="linenos">70</span></a><span class="sd"> If the predicates are in CNF like form, we can simply replace each block in the parent.</span> -</span><span id="pushdown_cnf-71"><a href="#pushdown_cnf-71"><span class="linenos">71</span></a><span class="sd"> """</span> -</span><span id="pushdown_cnf-72"><a href="#pushdown_cnf-72"><span class="linenos">72</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="pushdown_cnf-73"><a href="#pushdown_cnf-73"><span class="linenos">73</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="pushdown_cnf-74"><a href="#pushdown_cnf-74"><span class="linenos">74</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="pushdown_cnf-75"><a href="#pushdown_cnf-75"><span class="linenos">75</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="pushdown_cnf-76"><a href="#pushdown_cnf-76"><span class="linenos">76</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="pushdown_cnf-77"><a href="#pushdown_cnf-77"><span class="linenos">77</span></a> <span class="k">break</span> -</span><span id="pushdown_cnf-78"><a href="#pushdown_cnf-78"><span class="linenos">78</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="pushdown_cnf-79"><a href="#pushdown_cnf-79"><span class="linenos">79</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="pushdown_cnf-80"><a href="#pushdown_cnf-80"><span class="linenos">80</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_cnf-70"><a href="#pushdown_cnf-70"><span class="linenos">70</span></a><span class="k">def</span> <span class="nf">pushdown_cnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="pushdown_cnf-71"><a href="#pushdown_cnf-71"><span class="linenos">71</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="pushdown_cnf-72"><a href="#pushdown_cnf-72"><span class="linenos">72</span></a><span class="sd"> If the predicates are in CNF like form, we can simply replace each block in the parent.</span> +</span><span id="pushdown_cnf-73"><a href="#pushdown_cnf-73"><span class="linenos">73</span></a><span class="sd"> """</span> +</span><span id="pushdown_cnf-74"><a href="#pushdown_cnf-74"><span class="linenos">74</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="pushdown_cnf-75"><a href="#pushdown_cnf-75"><span class="linenos">75</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="pushdown_cnf-76"><a href="#pushdown_cnf-76"><span class="linenos">76</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="pushdown_cnf-77"><a href="#pushdown_cnf-77"><span class="linenos">77</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="pushdown_cnf-78"><a href="#pushdown_cnf-78"><span class="linenos">78</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="pushdown_cnf-79"><a href="#pushdown_cnf-79"><span class="linenos">79</span></a> <span class="k">break</span> +</span><span id="pushdown_cnf-80"><a href="#pushdown_cnf-80"><span class="linenos">80</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="pushdown_cnf-81"><a href="#pushdown_cnf-81"><span class="linenos">81</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="pushdown_cnf-82"><a href="#pushdown_cnf-82"><span class="linenos">82</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span></pre></div> @@ -432,65 +436,65 @@ </div> <a class="headerlink" href="#pushdown_dnf"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_dnf-83"><a href="#pushdown_dnf-83"><span class="linenos"> 83</span></a><span class="k">def</span> <span class="nf">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="pushdown_dnf-84"><a href="#pushdown_dnf-84"><span class="linenos"> 84</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="pushdown_dnf-85"><a href="#pushdown_dnf-85"><span class="linenos"> 85</span></a><span class="sd"> If the predicates are in DNF form, we can only push down conditions that are in all blocks.</span> -</span><span id="pushdown_dnf-86"><a href="#pushdown_dnf-86"><span class="linenos"> 86</span></a><span class="sd"> Additionally, we can't remove predicates from their original form.</span> -</span><span id="pushdown_dnf-87"><a href="#pushdown_dnf-87"><span class="linenos"> 87</span></a><span class="sd"> """</span> -</span><span id="pushdown_dnf-88"><a href="#pushdown_dnf-88"><span class="linenos"> 88</span></a> <span class="c1"># find all the tables that can be pushdown too</span> -</span><span id="pushdown_dnf-89"><a href="#pushdown_dnf-89"><span class="linenos"> 89</span></a> <span class="c1"># these are tables that are referenced in all blocks of a DNF</span> -</span><span id="pushdown_dnf-90"><a href="#pushdown_dnf-90"><span class="linenos"> 90</span></a> <span class="c1"># (a.x AND b.x) OR (a.y AND c.y)</span> -</span><span id="pushdown_dnf-91"><a href="#pushdown_dnf-91"><span class="linenos"> 91</span></a> <span class="c1"># only table a can be push down</span> -</span><span id="pushdown_dnf-92"><a href="#pushdown_dnf-92"><span class="linenos"> 92</span></a> <span class="n">pushdown_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="pushdown_dnf-93"><a href="#pushdown_dnf-93"><span class="linenos"> 93</span></a> -</span><span id="pushdown_dnf-94"><a href="#pushdown_dnf-94"><span class="linenos"> 94</span></a> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="pushdown_dnf-95"><a href="#pushdown_dnf-95"><span class="linenos"> 95</span></a> <span class="n">a_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">a</span><span class="p">))</span> -</span><span id="pushdown_dnf-96"><a href="#pushdown_dnf-96"><span class="linenos"> 96</span></a> -</span><span id="pushdown_dnf-97"><a href="#pushdown_dnf-97"><span class="linenos"> 97</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="pushdown_dnf-98"><a href="#pushdown_dnf-98"><span class="linenos"> 98</span></a> <span class="n">a_tables</span> <span class="o">&=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">b</span><span class="p">))</span> -</span><span id="pushdown_dnf-99"><a href="#pushdown_dnf-99"><span class="linenos"> 99</span></a> -</span><span id="pushdown_dnf-100"><a href="#pushdown_dnf-100"><span class="linenos">100</span></a> <span class="n">pushdown_tables</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">a_tables</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="pushdown_dnf-85"><a href="#pushdown_dnf-85"><span class="linenos"> 85</span></a><span class="k">def</span> <span class="nf">pushdown_dnf</span><span class="p">(</span><span class="n">predicates</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="pushdown_dnf-86"><a href="#pushdown_dnf-86"><span class="linenos"> 86</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="pushdown_dnf-87"><a href="#pushdown_dnf-87"><span class="linenos"> 87</span></a><span class="sd"> If the predicates are in DNF form, we can only push down conditions that are in all blocks.</span> +</span><span id="pushdown_dnf-88"><a href="#pushdown_dnf-88"><span class="linenos"> 88</span></a><span class="sd"> Additionally, we can't remove predicates from their original form.</span> +</span><span id="pushdown_dnf-89"><a href="#pushdown_dnf-89"><span class="linenos"> 89</span></a><span class="sd"> """</span> +</span><span id="pushdown_dnf-90"><a href="#pushdown_dnf-90"><span class="linenos"> 90</span></a> <span class="c1"># find all the tables that can be pushdown too</span> +</span><span id="pushdown_dnf-91"><a href="#pushdown_dnf-91"><span class="linenos"> 91</span></a> <span class="c1"># these are tables that are referenced in all blocks of a DNF</span> +</span><span id="pushdown_dnf-92"><a href="#pushdown_dnf-92"><span class="linenos"> 92</span></a> <span class="c1"># (a.x AND b.x) OR (a.y AND c.y)</span> +</span><span id="pushdown_dnf-93"><a href="#pushdown_dnf-93"><span class="linenos"> 93</span></a> <span class="c1"># only table a can be push down</span> +</span><span id="pushdown_dnf-94"><a href="#pushdown_dnf-94"><span class="linenos"> 94</span></a> <span class="n">pushdown_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="pushdown_dnf-95"><a href="#pushdown_dnf-95"><span class="linenos"> 95</span></a> +</span><span id="pushdown_dnf-96"><a href="#pushdown_dnf-96"><span class="linenos"> 96</span></a> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="pushdown_dnf-97"><a href="#pushdown_dnf-97"><span class="linenos"> 97</span></a> <span class="n">a_tables</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">a</span><span class="p">))</span> +</span><span id="pushdown_dnf-98"><a href="#pushdown_dnf-98"><span class="linenos"> 98</span></a> +</span><span id="pushdown_dnf-99"><a href="#pushdown_dnf-99"><span class="linenos"> 99</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="pushdown_dnf-100"><a href="#pushdown_dnf-100"><span class="linenos">100</span></a> <span class="n">a_tables</span> <span class="o">&=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">b</span><span class="p">))</span> </span><span id="pushdown_dnf-101"><a href="#pushdown_dnf-101"><span class="linenos">101</span></a> -</span><span id="pushdown_dnf-102"><a href="#pushdown_dnf-102"><span class="linenos">102</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="pushdown_dnf-102"><a href="#pushdown_dnf-102"><span class="linenos">102</span></a> <span class="n">pushdown_tables</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">a_tables</span><span class="p">)</span> </span><span id="pushdown_dnf-103"><a href="#pushdown_dnf-103"><span class="linenos">103</span></a> -</span><span id="pushdown_dnf-104"><a href="#pushdown_dnf-104"><span class="linenos">104</span></a> <span class="c1"># for every pushdown table, find all related conditions in all predicates</span> -</span><span id="pushdown_dnf-105"><a href="#pushdown_dnf-105"><span class="linenos">105</span></a> <span class="c1"># combine them with ORS</span> -</span><span id="pushdown_dnf-106"><a href="#pushdown_dnf-106"><span class="linenos">106</span></a> <span class="c1"># (a.x AND and a.y AND b.x) OR (a.z AND c.y) -> (a.x AND a.y) OR (a.z)</span> -</span><span id="pushdown_dnf-107"><a href="#pushdown_dnf-107"><span class="linenos">107</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">pushdown_tables</span><span class="p">):</span> -</span><span id="pushdown_dnf-108"><a href="#pushdown_dnf-108"><span class="linenos">108</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> -</span><span id="pushdown_dnf-109"><a href="#pushdown_dnf-109"><span class="linenos">109</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> -</span><span id="pushdown_dnf-110"><a href="#pushdown_dnf-110"><span class="linenos">110</span></a> -</span><span id="pushdown_dnf-111"><a href="#pushdown_dnf-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">nodes</span><span class="p">:</span> -</span><span id="pushdown_dnf-112"><a href="#pushdown_dnf-112"><span class="linenos">112</span></a> <span class="k">continue</span> -</span><span id="pushdown_dnf-113"><a href="#pushdown_dnf-113"><span class="linenos">113</span></a> -</span><span id="pushdown_dnf-114"><a href="#pushdown_dnf-114"><span class="linenos">114</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="pushdown_dnf-104"><a href="#pushdown_dnf-104"><span class="linenos">104</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="pushdown_dnf-105"><a href="#pushdown_dnf-105"><span class="linenos">105</span></a> +</span><span id="pushdown_dnf-106"><a href="#pushdown_dnf-106"><span class="linenos">106</span></a> <span class="c1"># for every pushdown table, find all related conditions in all predicates</span> +</span><span id="pushdown_dnf-107"><a href="#pushdown_dnf-107"><span class="linenos">107</span></a> <span class="c1"># combine them with ORS</span> +</span><span id="pushdown_dnf-108"><a href="#pushdown_dnf-108"><span class="linenos">108</span></a> <span class="c1"># (a.x AND and a.y AND b.x) OR (a.z AND c.y) -> (a.x AND a.y) OR (a.z)</span> +</span><span id="pushdown_dnf-109"><a href="#pushdown_dnf-109"><span class="linenos">109</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">pushdown_tables</span><span class="p">):</span> +</span><span id="pushdown_dnf-110"><a href="#pushdown_dnf-110"><span class="linenos">110</span></a> <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">predicates</span><span class="p">:</span> +</span><span id="pushdown_dnf-111"><a href="#pushdown_dnf-111"><span class="linenos">111</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="n">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">)</span> +</span><span id="pushdown_dnf-112"><a href="#pushdown_dnf-112"><span class="linenos">112</span></a> +</span><span id="pushdown_dnf-113"><a href="#pushdown_dnf-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">nodes</span><span class="p">:</span> +</span><span id="pushdown_dnf-114"><a href="#pushdown_dnf-114"><span class="linenos">114</span></a> <span class="k">continue</span> </span><span id="pushdown_dnf-115"><a href="#pushdown_dnf-115"><span class="linenos">115</span></a> -</span><span id="pushdown_dnf-116"><a href="#pushdown_dnf-116"><span class="linenos">116</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">predicate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="pushdown_dnf-117"><a href="#pushdown_dnf-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">table</span><span class="p">:</span> -</span><span id="pushdown_dnf-118"><a href="#pushdown_dnf-118"><span class="linenos">118</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">)</span> -</span><span id="pushdown_dnf-119"><a href="#pushdown_dnf-119"><span class="linenos">119</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="pushdown_dnf-120"><a href="#pushdown_dnf-120"><span class="linenos">120</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">predicate_condition</span><span class="p">,</span> <span class="n">condition</span><span class="p">)</span> -</span><span id="pushdown_dnf-121"><a href="#pushdown_dnf-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">predicate_condition</span> -</span><span id="pushdown_dnf-122"><a href="#pushdown_dnf-122"><span class="linenos">122</span></a> <span class="k">else</span> <span class="n">condition</span> -</span><span id="pushdown_dnf-123"><a href="#pushdown_dnf-123"><span class="linenos">123</span></a> <span class="p">)</span> -</span><span id="pushdown_dnf-124"><a href="#pushdown_dnf-124"><span class="linenos">124</span></a> -</span><span id="pushdown_dnf-125"><a href="#pushdown_dnf-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">predicate_condition</span><span class="p">:</span> -</span><span id="pushdown_dnf-126"><a href="#pushdown_dnf-126"><span class="linenos">126</span></a> <span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="pushdown_dnf-127"><a href="#pushdown_dnf-127"><span class="linenos">127</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span><span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">],</span> <span class="n">predicate_condition</span><span class="p">)</span> -</span><span id="pushdown_dnf-128"><a href="#pushdown_dnf-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">conditions</span> -</span><span id="pushdown_dnf-129"><a href="#pushdown_dnf-129"><span class="linenos">129</span></a> <span class="k">else</span> <span class="n">predicate_condition</span> -</span><span id="pushdown_dnf-130"><a href="#pushdown_dnf-130"><span class="linenos">130</span></a> <span class="p">)</span> -</span><span id="pushdown_dnf-131"><a href="#pushdown_dnf-131"><span class="linenos">131</span></a> -</span><span id="pushdown_dnf-132"><a href="#pushdown_dnf-132"><span class="linenos">132</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="pushdown_dnf-133"><a href="#pushdown_dnf-133"><span class="linenos">133</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">conditions</span><span class="p">:</span> -</span><span id="pushdown_dnf-134"><a href="#pushdown_dnf-134"><span class="linenos">134</span></a> <span class="k">continue</span> -</span><span id="pushdown_dnf-135"><a href="#pushdown_dnf-135"><span class="linenos">135</span></a> -</span><span id="pushdown_dnf-136"><a href="#pushdown_dnf-136"><span class="linenos">136</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">conditions</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="pushdown_dnf-116"><a href="#pushdown_dnf-116"><span class="linenos">116</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="pushdown_dnf-117"><a href="#pushdown_dnf-117"><span class="linenos">117</span></a> +</span><span id="pushdown_dnf-118"><a href="#pushdown_dnf-118"><span class="linenos">118</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">predicate</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="pushdown_dnf-119"><a href="#pushdown_dnf-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">table</span><span class="p">:</span> +</span><span id="pushdown_dnf-120"><a href="#pushdown_dnf-120"><span class="linenos">120</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">)</span> +</span><span id="pushdown_dnf-121"><a href="#pushdown_dnf-121"><span class="linenos">121</span></a> <span class="n">predicate_condition</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="pushdown_dnf-122"><a href="#pushdown_dnf-122"><span class="linenos">122</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="n">predicate_condition</span><span class="p">,</span> <span class="n">condition</span><span class="p">)</span> +</span><span id="pushdown_dnf-123"><a href="#pushdown_dnf-123"><span class="linenos">123</span></a> <span class="k">if</span> <span class="n">predicate_condition</span> +</span><span id="pushdown_dnf-124"><a href="#pushdown_dnf-124"><span class="linenos">124</span></a> <span class="k">else</span> <span class="n">condition</span> +</span><span id="pushdown_dnf-125"><a href="#pushdown_dnf-125"><span class="linenos">125</span></a> <span class="p">)</span> +</span><span id="pushdown_dnf-126"><a href="#pushdown_dnf-126"><span class="linenos">126</span></a> +</span><span id="pushdown_dnf-127"><a href="#pushdown_dnf-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="n">predicate_condition</span><span class="p">:</span> +</span><span id="pushdown_dnf-128"><a href="#pushdown_dnf-128"><span class="linenos">128</span></a> <span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="pushdown_dnf-129"><a href="#pushdown_dnf-129"><span class="linenos">129</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span><span class="n">conditions</span><span class="p">[</span><span class="n">table</span><span class="p">],</span> <span class="n">predicate_condition</span><span class="p">)</span> +</span><span id="pushdown_dnf-130"><a href="#pushdown_dnf-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">conditions</span> +</span><span id="pushdown_dnf-131"><a href="#pushdown_dnf-131"><span class="linenos">131</span></a> <span class="k">else</span> <span class="n">predicate_condition</span> +</span><span id="pushdown_dnf-132"><a href="#pushdown_dnf-132"><span class="linenos">132</span></a> <span class="p">)</span> +</span><span id="pushdown_dnf-133"><a href="#pushdown_dnf-133"><span class="linenos">133</span></a> +</span><span id="pushdown_dnf-134"><a href="#pushdown_dnf-134"><span class="linenos">134</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">nodes</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="pushdown_dnf-135"><a href="#pushdown_dnf-135"><span class="linenos">135</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">conditions</span><span class="p">:</span> +</span><span id="pushdown_dnf-136"><a href="#pushdown_dnf-136"><span class="linenos">136</span></a> <span class="k">continue</span> </span><span id="pushdown_dnf-137"><a href="#pushdown_dnf-137"><span class="linenos">137</span></a> -</span><span id="pushdown_dnf-138"><a href="#pushdown_dnf-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="pushdown_dnf-139"><a href="#pushdown_dnf-139"><span class="linenos">139</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="pushdown_dnf-140"><a href="#pushdown_dnf-140"><span class="linenos">140</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="pushdown_dnf-141"><a href="#pushdown_dnf-141"><span class="linenos">141</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="pushdown_dnf-138"><a href="#pushdown_dnf-138"><span class="linenos">138</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">conditions</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="pushdown_dnf-139"><a href="#pushdown_dnf-139"><span class="linenos">139</span></a> +</span><span id="pushdown_dnf-140"><a href="#pushdown_dnf-140"><span class="linenos">140</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="pushdown_dnf-141"><a href="#pushdown_dnf-141"><span class="linenos">141</span></a> <span class="n">node</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="pushdown_dnf-142"><a href="#pushdown_dnf-142"><span class="linenos">142</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="pushdown_dnf-143"><a href="#pushdown_dnf-143"><span class="linenos">143</span></a> <span class="n">node</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">replace_aliases</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">predicate</span><span class="p">),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span></pre></div> @@ -511,44 +515,44 @@ Additionally, we can't remove predicates from their original form.</p> </div> <a class="headerlink" href="#nodes_for_predicate"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="nodes_for_predicate-144"><a href="#nodes_for_predicate-144"><span class="linenos">144</span></a><span class="k">def</span> <span class="nf">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> -</span><span id="nodes_for_predicate-145"><a href="#nodes_for_predicate-145"><span class="linenos">145</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="nodes_for_predicate-146"><a href="#nodes_for_predicate-146"><span class="linenos">146</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> -</span><span id="nodes_for_predicate-147"><a href="#nodes_for_predicate-147"><span class="linenos">147</span></a> <span class="n">where_condition</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">)</span> -</span><span id="nodes_for_predicate-148"><a href="#nodes_for_predicate-148"><span class="linenos">148</span></a> -</span><span id="nodes_for_predicate-149"><a href="#nodes_for_predicate-149"><span class="linenos">149</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="nodes_for_predicate-150"><a href="#nodes_for_predicate-150"><span class="linenos">150</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">source</span> <span class="o">=</span> <span class="n">sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="nodes_for_predicate-151"><a href="#nodes_for_predicate-151"><span class="linenos">151</span></a> -</span><span id="nodes_for_predicate-152"><a href="#nodes_for_predicate-152"><span class="linenos">152</span></a> <span class="c1"># if the predicate is in a where statement we can try to push it down</span> -</span><span id="nodes_for_predicate-153"><a href="#nodes_for_predicate-153"><span class="linenos">153</span></a> <span class="c1"># we want to find the root join or from statement</span> -</span><span id="nodes_for_predicate-154"><a href="#nodes_for_predicate-154"><span class="linenos">154</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">where_condition</span><span class="p">:</span> -</span><span id="nodes_for_predicate-155"><a href="#nodes_for_predicate-155"><span class="linenos">155</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="nodes_for_predicate-156"><a href="#nodes_for_predicate-156"><span class="linenos">156</span></a> -</span><span id="nodes_for_predicate-157"><a href="#nodes_for_predicate-157"><span class="linenos">157</span></a> <span class="c1"># a node can reference a CTE which should be pushed down</span> -</span><span id="nodes_for_predicate-158"><a href="#nodes_for_predicate-158"><span class="linenos">158</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="nodes_for_predicate-159"><a href="#nodes_for_predicate-159"><span class="linenos">159</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> -</span><span id="nodes_for_predicate-160"><a href="#nodes_for_predicate-160"><span class="linenos">160</span></a> <span class="k">if</span> <span class="n">with_</span> <span class="ow">and</span> <span class="n">with_</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> -</span><span id="nodes_for_predicate-161"><a href="#nodes_for_predicate-161"><span class="linenos">161</span></a> <span class="k">return</span> <span class="p">{}</span> -</span><span id="nodes_for_predicate-162"><a href="#nodes_for_predicate-162"><span class="linenos">162</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> -</span><span id="nodes_for_predicate-163"><a href="#nodes_for_predicate-163"><span class="linenos">163</span></a> -</span><span id="nodes_for_predicate-164"><a href="#nodes_for_predicate-164"><span class="linenos">164</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="nodes_for_predicate-165"><a href="#nodes_for_predicate-165"><span class="linenos">165</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="o">!=</span> <span class="s2">"RIGHT"</span><span class="p">:</span> -</span><span id="nodes_for_predicate-166"><a href="#nodes_for_predicate-166"><span class="linenos">166</span></a> <span class="k">return</span> <span class="p">{}</span> -</span><span id="nodes_for_predicate-167"><a href="#nodes_for_predicate-167"><span class="linenos">167</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="nodes_for_predicate-168"><a href="#nodes_for_predicate-168"><span class="linenos">168</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="nodes_for_predicate-169"><a href="#nodes_for_predicate-169"><span class="linenos">169</span></a> <span class="c1"># We can't push down window expressions</span> -</span><span id="nodes_for_predicate-170"><a href="#nodes_for_predicate-170"><span class="linenos">170</span></a> <span class="n">has_window_expression</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="nodes_for_predicate-171"><a href="#nodes_for_predicate-171"><span class="linenos">171</span></a> <span class="n">select</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">selects</span> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> -</span><span id="nodes_for_predicate-172"><a href="#nodes_for_predicate-172"><span class="linenos">172</span></a> <span class="p">)</span> -</span><span id="nodes_for_predicate-173"><a href="#nodes_for_predicate-173"><span class="linenos">173</span></a> <span class="c1"># we can't push down predicates to select statements if they are referenced in</span> -</span><span id="nodes_for_predicate-174"><a href="#nodes_for_predicate-174"><span class="linenos">174</span></a> <span class="c1"># multiple places.</span> -</span><span id="nodes_for_predicate-175"><a href="#nodes_for_predicate-175"><span class="linenos">175</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="nodes_for_predicate-176"><a href="#nodes_for_predicate-176"><span class="linenos">176</span></a> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> -</span><span id="nodes_for_predicate-177"><a href="#nodes_for_predicate-177"><span class="linenos">177</span></a> <span class="ow">and</span> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o"><</span> <span class="mi">2</span> -</span><span id="nodes_for_predicate-178"><a href="#nodes_for_predicate-178"><span class="linenos">178</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">has_window_expression</span> -</span><span id="nodes_for_predicate-179"><a href="#nodes_for_predicate-179"><span class="linenos">179</span></a> <span class="p">):</span> -</span><span id="nodes_for_predicate-180"><a href="#nodes_for_predicate-180"><span class="linenos">180</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> -</span><span id="nodes_for_predicate-181"><a href="#nodes_for_predicate-181"><span class="linenos">181</span></a> <span class="k">return</span> <span class="n">nodes</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="nodes_for_predicate-146"><a href="#nodes_for_predicate-146"><span class="linenos">146</span></a><span class="k">def</span> <span class="nf">nodes_for_predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">sources</span><span class="p">,</span> <span class="n">scope_ref_count</span><span class="p">):</span> +</span><span id="nodes_for_predicate-147"><a href="#nodes_for_predicate-147"><span class="linenos">147</span></a> <span class="n">nodes</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="nodes_for_predicate-148"><a href="#nodes_for_predicate-148"><span class="linenos">148</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> +</span><span id="nodes_for_predicate-149"><a href="#nodes_for_predicate-149"><span class="linenos">149</span></a> <span class="n">where_condition</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">),</span> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">)</span> +</span><span id="nodes_for_predicate-150"><a href="#nodes_for_predicate-150"><span class="linenos">150</span></a> +</span><span id="nodes_for_predicate-151"><a href="#nodes_for_predicate-151"><span class="linenos">151</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="nodes_for_predicate-152"><a href="#nodes_for_predicate-152"><span class="linenos">152</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">source</span> <span class="o">=</span> <span class="n">sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> <span class="ow">or</span> <span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="nodes_for_predicate-153"><a href="#nodes_for_predicate-153"><span class="linenos">153</span></a> +</span><span id="nodes_for_predicate-154"><a href="#nodes_for_predicate-154"><span class="linenos">154</span></a> <span class="c1"># if the predicate is in a where statement we can try to push it down</span> +</span><span id="nodes_for_predicate-155"><a href="#nodes_for_predicate-155"><span class="linenos">155</span></a> <span class="c1"># we want to find the root join or from statement</span> +</span><span id="nodes_for_predicate-156"><a href="#nodes_for_predicate-156"><span class="linenos">156</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">where_condition</span><span class="p">:</span> +</span><span id="nodes_for_predicate-157"><a href="#nodes_for_predicate-157"><span class="linenos">157</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="nodes_for_predicate-158"><a href="#nodes_for_predicate-158"><span class="linenos">158</span></a> +</span><span id="nodes_for_predicate-159"><a href="#nodes_for_predicate-159"><span class="linenos">159</span></a> <span class="c1"># a node can reference a CTE which should be pushed down</span> +</span><span id="nodes_for_predicate-160"><a href="#nodes_for_predicate-160"><span class="linenos">160</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="nodes_for_predicate-161"><a href="#nodes_for_predicate-161"><span class="linenos">161</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"with"</span><span class="p">)</span> +</span><span id="nodes_for_predicate-162"><a href="#nodes_for_predicate-162"><span class="linenos">162</span></a> <span class="k">if</span> <span class="n">with_</span> <span class="ow">and</span> <span class="n">with_</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="nodes_for_predicate-163"><a href="#nodes_for_predicate-163"><span class="linenos">163</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="nodes_for_predicate-164"><a href="#nodes_for_predicate-164"><span class="linenos">164</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> +</span><span id="nodes_for_predicate-165"><a href="#nodes_for_predicate-165"><span class="linenos">165</span></a> +</span><span id="nodes_for_predicate-166"><a href="#nodes_for_predicate-166"><span class="linenos">166</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="nodes_for_predicate-167"><a href="#nodes_for_predicate-167"><span class="linenos">167</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">side</span> <span class="o">!=</span> <span class="s2">"RIGHT"</span><span class="p">:</span> +</span><span id="nodes_for_predicate-168"><a href="#nodes_for_predicate-168"><span class="linenos">168</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="nodes_for_predicate-169"><a href="#nodes_for_predicate-169"><span class="linenos">169</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="nodes_for_predicate-170"><a href="#nodes_for_predicate-170"><span class="linenos">170</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">tables</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="nodes_for_predicate-171"><a href="#nodes_for_predicate-171"><span class="linenos">171</span></a> <span class="c1"># We can't push down window expressions</span> +</span><span id="nodes_for_predicate-172"><a href="#nodes_for_predicate-172"><span class="linenos">172</span></a> <span class="n">has_window_expression</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="nodes_for_predicate-173"><a href="#nodes_for_predicate-173"><span class="linenos">173</span></a> <span class="n">select</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">selects</span> <span class="k">if</span> <span class="n">select</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> +</span><span id="nodes_for_predicate-174"><a href="#nodes_for_predicate-174"><span class="linenos">174</span></a> <span class="p">)</span> +</span><span id="nodes_for_predicate-175"><a href="#nodes_for_predicate-175"><span class="linenos">175</span></a> <span class="c1"># we can't push down predicates to select statements if they are referenced in</span> +</span><span id="nodes_for_predicate-176"><a href="#nodes_for_predicate-176"><span class="linenos">176</span></a> <span class="c1"># multiple places.</span> +</span><span id="nodes_for_predicate-177"><a href="#nodes_for_predicate-177"><span class="linenos">177</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="nodes_for_predicate-178"><a href="#nodes_for_predicate-178"><span class="linenos">178</span></a> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> +</span><span id="nodes_for_predicate-179"><a href="#nodes_for_predicate-179"><span class="linenos">179</span></a> <span class="ow">and</span> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o"><</span> <span class="mi">2</span> +</span><span id="nodes_for_predicate-180"><a href="#nodes_for_predicate-180"><span class="linenos">180</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">has_window_expression</span> +</span><span id="nodes_for_predicate-181"><a href="#nodes_for_predicate-181"><span class="linenos">181</span></a> <span class="p">):</span> +</span><span id="nodes_for_predicate-182"><a href="#nodes_for_predicate-182"><span class="linenos">182</span></a> <span class="n">nodes</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="n">node</span> +</span><span id="nodes_for_predicate-183"><a href="#nodes_for_predicate-183"><span class="linenos">183</span></a> <span class="k">return</span> <span class="n">nodes</span> </span></pre></div> @@ -566,21 +570,21 @@ Additionally, we can't remove predicates from their original form.</p> </div> <a class="headerlink" href="#replace_aliases"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="replace_aliases-184"><a href="#replace_aliases-184"><span class="linenos">184</span></a><span class="k">def</span> <span class="nf">replace_aliases</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">predicate</span><span class="p">):</span> -</span><span id="replace_aliases-185"><a href="#replace_aliases-185"><span class="linenos">185</span></a> <span class="n">aliases</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="replace_aliases-186"><a href="#replace_aliases-186"><span class="linenos">186</span></a> -</span><span id="replace_aliases-187"><a href="#replace_aliases-187"><span class="linenos">187</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="replace_aliases-188"><a href="#replace_aliases-188"><span class="linenos">188</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="replace_aliases-189"><a href="#replace_aliases-189"><span class="linenos">189</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="replace_aliases-190"><a href="#replace_aliases-190"><span class="linenos">190</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="replace_aliases-191"><a href="#replace_aliases-191"><span class="linenos">191</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span> -</span><span id="replace_aliases-192"><a href="#replace_aliases-192"><span class="linenos">192</span></a> -</span><span id="replace_aliases-193"><a href="#replace_aliases-193"><span class="linenos">193</span></a> <span class="k">def</span> <span class="nf">_replace_alias</span><span class="p">(</span><span class="n">column</span><span class="p">):</span> -</span><span id="replace_aliases-194"><a href="#replace_aliases-194"><span class="linenos">194</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliases</span><span class="p">:</span> -</span><span id="replace_aliases-195"><a href="#replace_aliases-195"><span class="linenos">195</span></a> <span class="k">return</span> <span class="n">aliases</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="replace_aliases-196"><a href="#replace_aliases-196"><span class="linenos">196</span></a> <span class="k">return</span> <span class="n">column</span> -</span><span id="replace_aliases-197"><a href="#replace_aliases-197"><span class="linenos">197</span></a> -</span><span id="replace_aliases-198"><a href="#replace_aliases-198"><span class="linenos">198</span></a> <span class="k">return</span> <span class="n">predicate</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">_replace_alias</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="replace_aliases-186"><a href="#replace_aliases-186"><span class="linenos">186</span></a><span class="k">def</span> <span class="nf">replace_aliases</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">predicate</span><span class="p">):</span> +</span><span id="replace_aliases-187"><a href="#replace_aliases-187"><span class="linenos">187</span></a> <span class="n">aliases</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="replace_aliases-188"><a href="#replace_aliases-188"><span class="linenos">188</span></a> +</span><span id="replace_aliases-189"><a href="#replace_aliases-189"><span class="linenos">189</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">source</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="replace_aliases-190"><a href="#replace_aliases-190"><span class="linenos">190</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="replace_aliases-191"><a href="#replace_aliases-191"><span class="linenos">191</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> +</span><span id="replace_aliases-192"><a href="#replace_aliases-192"><span class="linenos">192</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="replace_aliases-193"><a href="#replace_aliases-193"><span class="linenos">193</span></a> <span class="n">aliases</span><span class="p">[</span><span class="n">select</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">select</span> +</span><span id="replace_aliases-194"><a href="#replace_aliases-194"><span class="linenos">194</span></a> +</span><span id="replace_aliases-195"><a href="#replace_aliases-195"><span class="linenos">195</span></a> <span class="k">def</span> <span class="nf">_replace_alias</span><span class="p">(</span><span class="n">column</span><span class="p">):</span> +</span><span id="replace_aliases-196"><a href="#replace_aliases-196"><span class="linenos">196</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">aliases</span><span class="p">:</span> +</span><span id="replace_aliases-197"><a href="#replace_aliases-197"><span class="linenos">197</span></a> <span class="k">return</span> <span class="n">aliases</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> +</span><span id="replace_aliases-198"><a href="#replace_aliases-198"><span class="linenos">198</span></a> <span class="k">return</span> <span class="n">column</span> +</span><span id="replace_aliases-199"><a href="#replace_aliases-199"><span class="linenos">199</span></a> +</span><span id="replace_aliases-200"><a href="#replace_aliases-200"><span class="linenos">200</span></a> <span class="k">return</span> <span class="n">predicate</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">_replace_alias</span><span class="p">)</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/pushdown_projections.html b/docs/sqlglot/optimizer/pushdown_projections.html index 922b581..6c440b2 100644 --- a/docs/sqlglot/optimizer/pushdown_projections.html +++ b/docs/sqlglot/optimizer/pushdown_projections.html @@ -100,82 +100,85 @@ </span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span> </span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span> </span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">):</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="p">]</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="c1"># Group columns by source name</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="c1"># Push the selected columns down to the next scope</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT. The same holds if</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="c1"># we select from a pivoted source in the parent scope.</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="p">]</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="c1"># Group columns by source name</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="c1"># Push the selected columns down to the next scope</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">selection</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">order_refs</span><span class="p">:</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">True</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">True</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="n">star</span><span class="p">:</span> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">new_selections</span><span class="p">}</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">:</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> <span class="n">name</span><span class="p">))</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="c1"># If there are no remaining selections, just select a single constant</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">())</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selections</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">if</span> <span class="n">removed</span><span class="p">:</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a><span class="k">def</span> <span class="nf">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="c1"># Assume columns without a qualified table are references to output columns</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="p">{</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">}</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">order_refs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">selection</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">order_refs</span><span class="p">:</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">if</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="n">star</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">removed</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="n">star</span><span class="p">:</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">new_selections</span><span class="p">}</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">parent_selections</span><span class="p">):</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">:</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> <span class="n">name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="c1"># If there are no remaining selections, just select a single constant</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">new_selections</span><span class="p">:</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">DEFAULT_SELECTION</span><span class="p">())</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">new_selections</span><span class="p">,</span> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="n">removed</span><span class="p">:</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span></pre></div> @@ -236,41 +239,42 @@ </span><span id="pushdown_projections-40"><a href="#pushdown_projections-40"><span class="linenos">40</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)):</span> </span><span id="pushdown_projections-41"><a href="#pushdown_projections-41"><span class="linenos">41</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="n">referenced_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">})</span> </span><span id="pushdown_projections-42"><a href="#pushdown_projections-42"><span class="linenos">42</span></a> -</span><span id="pushdown_projections-43"><a href="#pushdown_projections-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">):</span> -</span><span id="pushdown_projections-44"><a href="#pushdown_projections-44"><span class="linenos">44</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT</span> -</span><span id="pushdown_projections-45"><a href="#pushdown_projections-45"><span class="linenos">45</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> -</span><span id="pushdown_projections-46"><a href="#pushdown_projections-46"><span class="linenos">46</span></a> -</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> -</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> -</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a> -</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> -</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> -</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> -</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> -</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span> -</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="p">]</span> -</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a> -</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span> -</span><span id="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> -</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a> -</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a> <span class="c1"># Group columns by source name</span> -</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span> -</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span> -</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span> -</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span> -</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a> -</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a> <span class="c1"># Push the selected columns down to the next scope</span> -</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> -</span><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a> -</span><span id="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="pushdown_projections-43"><a href="#pushdown_projections-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"distinct"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="pushdown_projections-44"><a href="#pushdown_projections-44"><span class="linenos">44</span></a> <span class="c1"># We can't remove columns SELECT DISTINCT nor UNION DISTINCT. The same holds if</span> +</span><span id="pushdown_projections-45"><a href="#pushdown_projections-45"><span class="linenos">45</span></a> <span class="c1"># we select from a pivoted source in the parent scope.</span> +</span><span id="pushdown_projections-46"><a href="#pushdown_projections-46"><span class="linenos">46</span></a> <span class="n">parent_selections</span> <span class="o">=</span> <span class="p">{</span><span class="n">SELECT_ALL</span><span class="p">}</span> +</span><span id="pushdown_projections-47"><a href="#pushdown_projections-47"><span class="linenos">47</span></a> +</span><span id="pushdown_projections-48"><a href="#pushdown_projections-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="pushdown_projections-49"><a href="#pushdown_projections-49"><span class="linenos">49</span></a> <span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> +</span><span id="pushdown_projections-50"><a href="#pushdown_projections-50"><span class="linenos">50</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> +</span><span id="pushdown_projections-51"><a href="#pushdown_projections-51"><span class="linenos">51</span></a> +</span><span id="pushdown_projections-52"><a href="#pushdown_projections-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="pushdown_projections-53"><a href="#pushdown_projections-53"><span class="linenos">53</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="n">parent_selections</span> +</span><span id="pushdown_projections-54"><a href="#pushdown_projections-54"><span class="linenos">54</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">is_star</span> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">):</span> +</span><span id="pushdown_projections-55"><a href="#pushdown_projections-55"><span class="linenos">55</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">right</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="pushdown_projections-56"><a href="#pushdown_projections-56"><span class="linenos">56</span></a> <span class="n">right</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="pushdown_projections-57"><a href="#pushdown_projections-57"><span class="linenos">57</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">select</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">left</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> +</span><span id="pushdown_projections-58"><a href="#pushdown_projections-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="n">SELECT_ALL</span> <span class="ow">in</span> <span class="n">parent_selections</span> <span class="ow">or</span> <span class="n">select</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="ow">in</span> <span class="n">parent_selections</span> +</span><span id="pushdown_projections-59"><a href="#pushdown_projections-59"><span class="linenos">59</span></a> <span class="p">]</span> +</span><span id="pushdown_projections-60"><a href="#pushdown_projections-60"><span class="linenos">60</span></a> +</span><span id="pushdown_projections-61"><a href="#pushdown_projections-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="pushdown_projections-62"><a href="#pushdown_projections-62"><span class="linenos">62</span></a> <span class="k">if</span> <span class="n">remove_unused_selections</span><span class="p">:</span> +</span><span id="pushdown_projections-63"><a href="#pushdown_projections-63"><span class="linenos">63</span></a> <span class="n">_remove_unused_selections</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">parent_selections</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> +</span><span id="pushdown_projections-64"><a href="#pushdown_projections-64"><span class="linenos">64</span></a> +</span><span id="pushdown_projections-65"><a href="#pushdown_projections-65"><span class="linenos">65</span></a> <span class="c1"># Group columns by source name</span> +</span><span id="pushdown_projections-66"><a href="#pushdown_projections-66"><span class="linenos">66</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span> +</span><span id="pushdown_projections-67"><a href="#pushdown_projections-67"><span class="linenos">67</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="pushdown_projections-68"><a href="#pushdown_projections-68"><span class="linenos">68</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">table</span> +</span><span id="pushdown_projections-69"><a href="#pushdown_projections-69"><span class="linenos">69</span></a> <span class="n">col_name</span> <span class="o">=</span> <span class="n">col</span><span class="o">.</span><span class="n">name</span> +</span><span id="pushdown_projections-70"><a href="#pushdown_projections-70"><span class="linenos">70</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">col_name</span><span class="p">)</span> +</span><span id="pushdown_projections-71"><a href="#pushdown_projections-71"><span class="linenos">71</span></a> +</span><span id="pushdown_projections-72"><a href="#pushdown_projections-72"><span class="linenos">72</span></a> <span class="c1"># Push the selected columns down to the next scope</span> +</span><span id="pushdown_projections-73"><a href="#pushdown_projections-73"><span class="linenos">73</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="pushdown_projections-74"><a href="#pushdown_projections-74"><span class="linenos">74</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">):</span> +</span><span id="pushdown_projections-75"><a href="#pushdown_projections-75"><span class="linenos">75</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="pushdown_projections-76"><a href="#pushdown_projections-76"><span class="linenos">76</span></a> <span class="n">referenced_columns</span><span class="p">[</span><span class="n">source</span><span class="p">]</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="pushdown_projections-77"><a href="#pushdown_projections-77"><span class="linenos">77</span></a> +</span><span id="pushdown_projections-78"><a href="#pushdown_projections-78"><span class="linenos">78</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/qualify_columns.html b/docs/sqlglot/optimizer/qualify_columns.html index 2d257f2..950bc67 100644 --- a/docs/sqlglot/optimizer/qualify_columns.html +++ b/docs/sqlglot/optimizer/qualify_columns.html @@ -77,539 +77,559 @@ <label class="view-source-button" for="mod-qualify_columns-view-source"><span>View Source</span></label> - <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">import</span> <span class="nn">itertools</span> -</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> -</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a> -</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">alias</span><span class="p">,</span> <span class="n">exp</span> -</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> -</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.expand_laterals</span> <span class="kn">import</span> <span class="n">expand_laterals</span> <span class="k">as</span> <span class="n">_expand_laterals</span> -</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span> -</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">ensure_schema</span> -</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a> -</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a> -</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="k">def</span> <span class="nf">qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">expand_laterals</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> -</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="sd"> Example:</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span> -</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span> +</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a> +</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span> <span class="nn">itertools</span> +</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> +</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">alias</span><span class="p">,</span> <span class="n">exp</span> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">seq_get</span> +</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span><span class="p">,</span> <span class="n">walk_in_scope</span> +</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="kn">from</span> <span class="nn">sqlglot.schema</span> <span class="kn">import</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">ensure_schema</span> +</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> +</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> +</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a><span class="k">def</span> <span class="nf">qualify_columns</span><span class="p">(</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">,</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="n">expand_alias_refs</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</span> </span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> Args:</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> schema (dict|sqlglot.optimizer.Schema): Database schema</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> Returns:</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> """</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">mapping</span> <span class="ow">and</span> <span class="n">expand_laterals</span><span class="p">:</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">_expand_laterals</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">)</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> Example:</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> Args:</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> expression: expression to qualify</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> schema: Database schema</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> expand_alias_refs: whether or not to expand references to aliases</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> infer_schema: whether or not to infer the schema if missing</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> Returns:</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a><span class="sd"> """</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">infer_schema</span> <span class="o">=</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="k">if</span> <span class="n">infer_schema</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">infer_schema</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="o">=</span><span class="n">infer_schema</span><span class="p">)</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> </span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="k">if</span> <span class="n">schema</span><span class="o">.</span><span class="n">mapping</span> <span class="ow">and</span> <span class="n">expand_laterals</span><span class="p">:</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">_expand_laterals</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="k">if</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> </span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> </span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a><span class="k">def</span> <span class="nf">validate_qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span><span class="p">:</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">' for column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">)</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a><span class="k">def</span> <span class="nf">_pop_table_column_aliases</span><span class="p">(</span><span class="n">derived_tables</span><span class="p">):</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a><span class="sd"> Remove table column aliases.</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a><span class="sd"> (e.g. SELECT ... FROM (SELECT ...) AS foo(col1, col2)</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="sd"> """</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">derived_tables</span><span class="p">:</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="n">table_alias</span><span class="p">:</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a><span class="k">def</span> <span class="nf">validate_qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="sa">f</span><span class="s2">"""Column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">' could not be resolved</span><span class="si">{</span><span class="sa">f</span><span class="s2">" for table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">'"</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="s1">''</span><span class="si">}</span><span class="s2">"""</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="p">)</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a><span class="k">def</span> <span class="nf">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">ordered</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">]</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a><span class="k">def</span> <span class="nf">_pop_table_column_aliases</span><span class="p">(</span><span class="n">derived_tables</span><span class="p">):</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a><span class="sd"> Remove table column aliases.</span> </span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="c1"># Mapping of automatically joined column names to an ordered set of source names (dict).</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">column_tables</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">using</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">using</span><span class="p">:</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">continue</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">join_table</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="sd"> (e.g. SELECT ... FROM (SELECT ...) AS foo(col1, col2)</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="sd"> """</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">derived_tables</span><span class="p">:</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="k">if</span> <span class="n">table_alias</span><span class="p">:</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a><span class="k">def</span> <span class="nf">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">))</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">names</span> <span class="o">=</span> <span class="p">{</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">}</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">ordered</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">names</span><span class="p">]</span> </span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">ordered</span><span class="p">:</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">):</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">if</span> <span class="n">column</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">k</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="c1"># Mapping of automatically joined column names to an ordered set of source names (dict).</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">column_tables</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="n">using</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> </span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="n">source_table</span> <span class="o">=</span> <span class="n">ordered</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="n">join_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">using</span><span class="p">:</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">continue</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="n">join_table</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> </span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">for</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">using</span><span class="p">:</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">identifier</span><span class="p">)</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">identifier</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">join_columns</span><span class="p">:</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">columns</span> <span class="ow">and</span> <span class="n">join_columns</span><span class="p">:</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Cannot automatically join: </span><span class="si">{</span><span class="n">identifier</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">ordered</span><span class="p">:</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">):</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="n">column</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">k</span> </span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">source_table</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">conditions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">(</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">),</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">join_table</span><span class="p">),</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="p">)</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="p">)</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="p">)</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="c1"># Set all values in the dict to None, because we only care about the key ordering</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="p">{})</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">tables</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="n">join_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">tables</span><span class="p">[</span><span class="n">join_table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="o">*</span><span class="n">conditions</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="k">if</span> <span class="n">column_tables</span><span class="p">:</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">column_tables</span><span class="p">:</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="c1"># Ensure selects keep their output name</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">replacement</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">replacement</span><span class="p">)</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">source_table</span> <span class="o">=</span> <span class="n">ordered</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">join_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">join_table</span><span class="p">)</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">conditions</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">for</span> <span class="n">identifier</span> <span class="ow">in</span> <span class="n">using</span><span class="p">:</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="n">identifier</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">identifier</span><span class="p">)</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">identifier</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">join_columns</span><span class="p">:</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">columns</span> <span class="ow">and</span> <span class="n">join_columns</span><span class="p">:</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Cannot automatically join: </span><span class="si">{</span><span class="n">identifier</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">table</span> <span class="ow">or</span> <span class="n">source_table</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="n">conditions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">(</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">),</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">join_table</span><span class="p">),</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="p">)</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="p">)</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="p">)</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="c1"># Set all values in the dict to None, because we only care about the key ordering</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">identifier</span><span class="p">,</span> <span class="p">{})</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="n">tables</span><span class="p">[</span><span class="n">table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="n">join_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="n">tables</span><span class="p">[</span><span class="n">join_table</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"using"</span><span class="p">)</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span><span class="o">*</span><span class="n">conditions</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> </span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="n">column_tables</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a><span class="k">def</span> <span class="nf">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="c1"># Replace references to select aliases</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">def</span> <span class="nf">transform</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">source_first</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">node</span><span class="o">.</span><span class="n">table</span><span class="p">:</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="n">column_tables</span><span class="p">:</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">column_tables</span><span class="p">:</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">column_tables</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="c1"># Ensure selects keep their output name</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">replacement</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">replacement</span><span class="p">,</span> <span class="n">alias</span><span class="o">=</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> </span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="c1"># Source columns get priority over select aliases</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="k">if</span> <span class="n">source_first</span> <span class="ow">and</span> <span class="n">table</span><span class="p">:</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">return</span> <span class="n">node</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">replacement</span><span class="p">)</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">return</span> <span class="n">column_tables</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> </span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selects</span><span class="p">:</span> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="n">selects</span><span class="p">[</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">s</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">selects</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="k">if</span> <span class="n">select</span><span class="p">:</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="k">return</span> <span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">node</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">transform</span><span class="p">,</span> <span class="n">source_first</span><span class="p">)</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">return</span> <span class="n">node</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">for</span> <span class="n">select</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">transform</span><span class="p">(</span><span class="n">select</span><span class="p">)</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">for</span> <span class="n">modifier</span><span class="p">,</span> <span class="n">source_first</span> <span class="ow">in</span> <span class="p">(</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="kc">True</span><span class="p">),</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="kc">True</span><span class="p">),</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="p">(</span><span class="s2">"having"</span><span class="p">,</span> <span class="kc">False</span><span class="p">),</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="p">):</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">transform</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">modifier</span><span class="p">),</span> <span class="n">source_first</span><span class="o">=</span><span class="n">source_first</span><span class="p">)</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a><span class="k">def</span> <span class="nf">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">group</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">group</span><span class="p">:</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="k">return</span> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">group</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">group</span><span class="o">.</span><span class="n">expressions</span><span class="p">))</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="n">group</span><span class="p">)</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a><span class="k">def</span> <span class="nf">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">:</span> <span class="n">Resolver</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="k">return</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">alias_to_expression</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="k">def</span> <span class="nf">replace_columns</span><span class="p">(</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">node</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">],</span> <span class="n">expand</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> <span class="n">resolve_agg</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="p">):</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">node</span><span class="p">:</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="k">return</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="n">node</span><span class="p">):</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="k">continue</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">resolve_agg</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="k">else</span> <span class="kc">None</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">):</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">elif</span> <span class="n">expand</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">alias_to_expression</span><span class="p">:</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">alias_to_expression</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="k">for</span> <span class="n">projection</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">projection</span><span class="p">)</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">projection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">alias_to_expression</span><span class="p">[</span><span class="n">projection</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">projection</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">))</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">))</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"having"</span><span class="p">),</span> <span class="n">resolve_agg</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"qualify"</span><span class="p">),</span> <span class="n">resolve_agg</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">),</span> <span class="n">expand</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">resolve_agg</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> </span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a><span class="k">def</span> <span class="nf">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">order</span><span class="p">:</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a><span class="k">def</span> <span class="nf">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">group</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"group"</span><span class="p">)</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">group</span><span class="p">:</span> </span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="k">return</span> </span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">ordereds</span> <span class="o">=</span> <span class="n">order</span><span class="o">.</span><span class="n">expressions</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">for</span> <span class="n">ordered</span><span class="p">,</span> <span class="n">new_expression</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">ordereds</span><span class="p">,</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">this</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">ordereds</span><span class="p">)),</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="p">):</span> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">new_expression</span><span class="p">)</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a><span class="k">def</span> <span class="nf">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">expressions</span><span class="p">):</span> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="n">new_nodes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">is_int</span><span class="p">:</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown output column: </span><span class="si">{</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">return</span> <span class="n">new_nodes</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a><span class="k">def</span> <span class="nf">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a><span class="w"> </span><span class="sd">"""Disambiguate columns, ensuring each column specifies a source"""</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">group</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">group</span><span class="o">.</span><span class="n">expressions</span><span class="p">))</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"group"</span><span class="p">,</span> <span class="n">group</span><span class="p">)</span> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a><span class="k">def</span> <span class="nf">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">order</span><span class="p">:</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">return</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="n">ordereds</span> <span class="o">=</span> <span class="n">order</span><span class="o">.</span><span class="n">expressions</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">for</span> <span class="n">ordered</span><span class="p">,</span> <span class="n">new_expression</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="n">ordereds</span><span class="p">,</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="n">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">this</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">ordereds</span><span class="p">)),</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="p">):</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="n">ordered</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">new_expression</span><span class="p">)</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="k">def</span> <span class="nf">_expand_positional_references</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">expressions</span><span class="p">):</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="n">new_nodes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="k">if</span> <span class="n">node</span><span class="o">.</span><span class="n">is_int</span><span class="p">:</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="nb">int</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown output column: </span><span class="si">{</span><span class="n">node</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">):</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">select</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="n">new_nodes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> </span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="k">if</span> <span class="n">column_table</span> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">column_table</span><span class="p">)</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="k">if</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">:</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column: </span><span class="si">{</span><span class="n">column_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="c1"># column_table can be a '' because bigquery unnest has no table alias</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">column_table</span><span class="p">)</span> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="k">elif</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span> <span class="ow">and</span> <span class="p">(</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">or</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">sources</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="p">):</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="c1"># structs are used like tables (e.g. "struct"."field"), so they need to be qualified</span> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="c1"># separately and represented as dot(dot(...(<table>.<column>, field1), field2, ...))</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">parts</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="k">if</span> <span class="n">root</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="c1"># struct is already qualified, but we still need to change the AST representation</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">root</span> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">parts</span> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Dot</span><span class="o">.</span><span class="n">build</span><span class="p">([</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">column_table</span><span class="p">),</span> <span class="o">*</span><span class="n">parts</span><span class="p">]))</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="n">columns_missing_from_scope</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="c1"># Determine whether each reference in the order by clause is to a column or an alias.</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">order</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">)</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="k">return</span> <span class="n">new_nodes</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a><span class="k">def</span> <span class="nf">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a><span class="w"> </span><span class="sd">"""Disambiguate columns, ensuring each column specifies a source"""</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="n">column_name</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">if</span> <span class="n">column_table</span> <span class="ow">and</span> <span class="n">column_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">column_table</span><span class="p">)</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="k">if</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="n">column_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown column: </span><span class="si">{</span><span class="n">column_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Pivot</span><span class="p">):</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="c1"># If the column is under the Pivot expression, we need to qualify it</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="c1"># using the name of the pivoted source instead of the pivot's alias</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">))</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="k">continue</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="c1"># column_table can be a '' because bigquery unnest has no table alias</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">column_table</span><span class="p">)</span> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">elif</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span> <span class="ow">and</span> <span class="p">(</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span> <span class="ow">or</span> <span class="n">column_table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">sources</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="p">):</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="c1"># structs are used like tables (e.g. "struct"."field"), so they need to be qualified</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="c1"># separately and represented as dot(dot(...(<table>.<column>, field1), field2, ...))</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">parts</span> </span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">if</span> <span class="n">order</span><span class="p">:</span> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="k">for</span> <span class="n">ordered</span> <span class="ow">in</span> <span class="n">order</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ordered</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">parent</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">ordered</span> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="p">):</span> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">if</span> <span class="n">root</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="c1"># struct is already qualified, but we still need to change the AST representation</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">root</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">root</span><span class="p">,</span> <span class="o">*</span><span class="n">parts</span> <span class="o">=</span> <span class="n">parts</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Dot</span><span class="o">.</span><span class="n">build</span><span class="p">([</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">column_table</span><span class="p">),</span> <span class="o">*</span><span class="n">parts</span><span class="p">]))</span> </span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> <span class="c1"># Determine whether each reference in the having clause is to a column or an alias.</span> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="n">having</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"having"</span><span class="p">)</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> -</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a> <span class="k">if</span> <span class="n">having</span><span class="p">:</span> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">having</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="p">):</span> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="n">columns_missing_from_scope</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> -</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_missing_from_scope</span><span class="p">:</span> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> -</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">column_table</span><span class="p">)</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> -</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a><span class="k">def</span> <span class="nf">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">):</span> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a><span class="w"> </span><span class="sd">"""Expand stars to lists of column selections"""</span> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="n">except_columns</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="n">replace_columns</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="n">coalesced_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> -</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="k">elif</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">continue</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">if</span> <span class="n">columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="n">table_id</span> <span class="o">=</span> <span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">using_column_tables</span> <span class="ow">and</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]:</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">coalesced_columns</span><span class="p">:</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">continue</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> -</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">coalesced_columns</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> -</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:]),</span> <span class="n">alias</span><span class="o">=</span><span class="n">name</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="p">)</span> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="p">)</span> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">elif</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">except_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="nb">set</span><span class="p">()):</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">replace_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="p">)</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">alias</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias_</span> <span class="o">!=</span> <span class="n">name</span> <span class="k">else</span> <span class="n">column</span><span class="p">)</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="k">return</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a><span class="k">def</span> <span class="nf">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">):</span> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="n">except_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"except"</span><span class="p">)</span> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">except_</span><span class="p">:</span> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="k">return</span> -</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">except_</span><span class="p">}</span> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="n">except_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a><span class="k">def</span> <span class="nf">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">):</span> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">replace</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"replace"</span><span class="p">)</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> <span class="k">for</span> <span class="n">pivot</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">):</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">resolver</span><span class="o">.</span><span class="n">all_columns</span><span class="p">:</span> +</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a> <span class="n">column_table</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_table</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">if</span> <span class="n">column_table</span><span class="p">:</span> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">column_table</span><span class="p">)</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a><span class="k">def</span> <span class="nf">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">):</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a><span class="w"> </span><span class="sd">"""Expand stars to lists of column selections"""</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="n">except_columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">replace_columns</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="n">coalesced_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="c1"># TODO: handle optimization of multiple PIVOTs (and possibly UNPIVOTs) in the future</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="n">pivot_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="n">pivot</span> <span class="o">=</span> <span class="n">seq_get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="n">has_pivoted_source</span> <span class="o">=</span> <span class="n">pivot</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivot</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"unpivot"</span><span class="p">)</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="k">if</span> <span class="n">has_pivoted_source</span><span class="p">:</span> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="n">pivot_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">col</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">))</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span><span class="o">.</span><span class="n">output_name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="p">[])]</span> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">pivot_output_columns</span><span class="p">:</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="n">pivot_output_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">pivot</span><span class="o">.</span><span class="n">expressions</span><span class="p">]</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">:</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">elif</span> <span class="n">expression</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="p">[</span><span class="n">expression</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="n">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">)</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">)</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">continue</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="k">if</span> <span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="n">resolver</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">table</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="n">columns</span> <span class="ow">and</span> <span class="s2">"*"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="k">if</span> <span class="n">has_pivoted_source</span><span class="p">:</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="n">implicit_columns</span> <span class="o">=</span> <span class="p">[</span><span class="n">col</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">columns</span> <span class="k">if</span> <span class="n">col</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">pivot_columns</span><span class="p">]</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">pivot</span><span class="o">.</span><span class="n">alias</span><span class="p">),</span> <span class="n">name</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">implicit_columns</span> <span class="o">+</span> <span class="n">pivot_output_columns</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="p">)</span> +</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="k">continue</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="n">table_id</span> <span class="o">=</span> <span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">using_column_tables</span> <span class="ow">and</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]:</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">coalesced_columns</span><span class="p">:</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">continue</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="n">coalesced_columns</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">using_column_tables</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="n">coalesce</span> <span class="o">=</span> <span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">]</span> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="n">alias</span><span class="p">(</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">expressions</span><span class="o">=</span><span class="n">coalesce</span><span class="p">[</span><span class="mi">1</span><span class="p">:]),</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">name</span><span class="p">,</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="p">)</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="p">)</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="k">elif</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">except_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="nb">set</span><span class="p">()):</span> +</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">replace_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_id</span><span class="p">,</span> <span class="p">{})</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">alias</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="n">alias_</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> <span class="k">if</span> <span class="n">alias_</span> <span class="o">!=</span> <span class="n">name</span> <span class="k">else</span> <span class="n">column</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="p">)</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">return</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> </span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span><span class="p">:</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="k">return</span> -</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">e</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">replace</span><span class="p">}</span> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="n">replace_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a><span class="k">def</span> <span class="nf">_add_except_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">except_columns</span><span class="p">):</span> +</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="n">except_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"except"</span><span class="p">)</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">except_</span><span class="p">:</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">return</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">except_</span><span class="p">}</span> </span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="k">def</span> <span class="nf">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="w"> </span><span class="sd">"""Ensure all output columns are aliased"""</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="n">except_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> </span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">aliased_column</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">outer_column_list</span><span class="p">)</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="p">):</span> -</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> -</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">output_name</span><span class="p">:</span> -</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="n">selection</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)))</span> -</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> -</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="s2">""</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">selection</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="n">alias_</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">selection</span><span class="p">)</span> -</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="n">selection</span> <span class="o">=</span> <span class="n">alias_</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a><span class="k">def</span> <span class="nf">_add_replace_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">tables</span><span class="p">,</span> <span class="n">replace_columns</span><span class="p">):</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">replace</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"replace"</span><span class="p">)</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">replace</span><span class="p">:</span> +</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">return</span> +</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">e</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">e</span><span class="o">.</span><span class="n">alias</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">replace</span><span class="p">}</span> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> +</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="n">replace_columns</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">table</span><span class="p">)]</span> <span class="o">=</span> <span class="n">columns</span> </span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> -</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="k">if</span> <span class="n">aliased_column</span><span class="p">:</span> -</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="n">selection</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">aliased_column</span><span class="p">))</span> -</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> -</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span> +</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> +</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a><span class="k">def</span> <span class="nf">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a><span class="w"> </span><span class="sd">"""Ensure all output columns are aliased"""</span> +</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="n">new_selections</span> <span class="o">=</span> <span class="p">[]</span> </span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> -</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> -</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> -</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> -</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> -</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a><span class="sd"> Helper for resolving columns.</span> -</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> -</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span> -</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a><span class="sd"> """</span> -</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> -</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> -</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> -</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">aliased_column</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span> +</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="n">itertools</span><span class="o">.</span><span class="n">zip_longest</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">selects</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">outer_column_list</span><span class="p">)</span> +</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="p">):</span> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">output_name</span><span class="p">:</span> +</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="n">selection</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">)))</span> +</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> <span class="k">elif</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Alias</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">selection</span><span class="o">.</span><span class="n">is_star</span><span class="p">:</span> +</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="n">selection</span> <span class="o">=</span> <span class="n">alias</span><span class="p">(</span> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="n">selection</span><span class="p">,</span> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">selection</span><span class="o">.</span><span class="n">output_name</span> <span class="ow">or</span> <span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">,</span> +</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="n">quoted</span><span class="o">=</span><span class="kc">True</span> +</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">selection</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="n">selection</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> +</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> <span class="k">else</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="p">)</span> +</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> <span class="k">if</span> <span class="n">aliased_column</span><span class="p">:</span> +</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="n">selection</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">aliased_column</span><span class="p">))</span> </span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> -</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> -</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="n">new_selections</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">selection</span><span class="p">)</span> +</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> +</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">new_selections</span><span class="p">)</span> </span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> -</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a><span class="sd"> Args:</span> -</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a><span class="sd"> column_name: The column name to find the table for.</span> -</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a><span class="sd"> Returns:</span> -</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a><span class="sd"> The table name if it can be found/inferred.</span> -</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a><span class="sd"> """</span> -</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> -</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> -</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="p">)</span> -</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> -</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> -</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> -</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> -</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="n">source</span> -</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> <span class="p">)</span> -</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a> -</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> -</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> -</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> -</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> +</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> +</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a><span class="sd"> Helper for resolving columns.</span> +</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> +</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span> +</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a><span class="sd"> """</span> +</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> +</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">):</span> +</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> +</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span> +</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> +</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> +</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> +</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a><span class="sd"> Args:</span> +</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a><span class="sd"> column_name: The column name to find the table for.</span> +</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a><span class="sd"> Returns:</span> +</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a><span class="sd"> The table name if it can be found/inferred.</span> +</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a><span class="sd"> """</span> +</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> +</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> +</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="p">)</span> </span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> -</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> -</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="k">return</span> <span class="n">node_alias</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> -</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> -</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> -</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> <span class="p">)</span> -</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> -</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="nd">@property</span> -</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> -</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> <span class="p">}</span> -</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> -</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> -</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> -</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> -</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> +</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span> +</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="n">source</span> +</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> <span class="p">)</span> +</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> +</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> +</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> +</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> +</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> +</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> +</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> +</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> +</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> </span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> -</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> -</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> +</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> +</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="p">)</span> </span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a> -</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> -</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> -</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a> -</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> -</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> -</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a> -</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> -</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a> <span class="p">}</span> -</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="nd">@property</span> +</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> +</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a> <span class="p">}</span> +</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> +</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a> +</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> </span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a> -</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> -</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> -</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a> -</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a><span class="sd"> Args:</span> -</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> -</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a><span class="sd"> Returns:</span> -</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a><span class="sd"> dict: Mapping of column name to source name</span> -</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a><span class="sd"> """</span> -</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> -</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a> +</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a> +</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a> +</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> </span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a> -</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> -</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> -</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> -</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> -</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> -</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> -</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> -</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> -</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> -</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> -</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a> -</span><span id="L-517"><a href="#L-517"><span class="linenos">517</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> -</span><span id="L-518"><a href="#L-518"><span class="linenos">518</span></a> -</span><span id="L-519"><a href="#L-519"><span class="linenos">519</span></a> <span class="nd">@staticmethod</span> -</span><span id="L-520"><a href="#L-520"><span class="linenos">520</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> -</span><span id="L-521"><a href="#L-521"><span class="linenos">521</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-522"><a href="#L-522"><span class="linenos">522</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> +</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="p">}</span> +</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> +</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> +</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> +</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> +</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a><span class="sd"> Args:</span> +</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> +</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a><span class="sd"> Returns:</span> +</span><span id="L-517"><a href="#L-517"><span class="linenos">517</span></a><span class="sd"> dict: Mapping of column name to source name</span> +</span><span id="L-518"><a href="#L-518"><span class="linenos">518</span></a><span class="sd"> """</span> +</span><span id="L-519"><a href="#L-519"><span class="linenos">519</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="L-520"><a href="#L-520"><span class="linenos">520</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="L-521"><a href="#L-521"><span class="linenos">521</span></a> +</span><span id="L-522"><a href="#L-522"><span class="linenos">522</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> </span><span id="L-523"><a href="#L-523"><span class="linenos">523</span></a> -</span><span id="L-524"><a href="#L-524"><span class="linenos">524</span></a><span class="sd"> Example:</span> -</span><span id="L-525"><a href="#L-525"><span class="linenos">525</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> -</span><span id="L-526"><a href="#L-526"><span class="linenos">526</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="L-524"><a href="#L-524"><span class="linenos">524</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-525"><a href="#L-525"><span class="linenos">525</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> +</span><span id="L-526"><a href="#L-526"><span class="linenos">526</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> </span><span id="L-527"><a href="#L-527"><span class="linenos">527</span></a> -</span><span id="L-528"><a href="#L-528"><span class="linenos">528</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> -</span><span id="L-529"><a href="#L-529"><span class="linenos">529</span></a><span class="sd"> """</span> -</span><span id="L-530"><a href="#L-530"><span class="linenos">530</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-531"><a href="#L-531"><span class="linenos">531</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-532"><a href="#L-532"><span class="linenos">532</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="L-533"><a href="#L-533"><span class="linenos">533</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> +</span><span id="L-528"><a href="#L-528"><span class="linenos">528</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="L-529"><a href="#L-529"><span class="linenos">529</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="L-530"><a href="#L-530"><span class="linenos">530</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> +</span><span id="L-531"><a href="#L-531"><span class="linenos">531</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="L-532"><a href="#L-532"><span class="linenos">532</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> +</span><span id="L-533"><a href="#L-533"><span class="linenos">533</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-534"><a href="#L-534"><span class="linenos">534</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> +</span><span id="L-535"><a href="#L-535"><span class="linenos">535</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> +</span><span id="L-536"><a href="#L-536"><span class="linenos">536</span></a> +</span><span id="L-537"><a href="#L-537"><span class="linenos">537</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> +</span><span id="L-538"><a href="#L-538"><span class="linenos">538</span></a> +</span><span id="L-539"><a href="#L-539"><span class="linenos">539</span></a> <span class="nd">@staticmethod</span> +</span><span id="L-540"><a href="#L-540"><span class="linenos">540</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> +</span><span id="L-541"><a href="#L-541"><span class="linenos">541</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-542"><a href="#L-542"><span class="linenos">542</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="L-543"><a href="#L-543"><span class="linenos">543</span></a> +</span><span id="L-544"><a href="#L-544"><span class="linenos">544</span></a><span class="sd"> Example:</span> +</span><span id="L-545"><a href="#L-545"><span class="linenos">545</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> +</span><span id="L-546"><a href="#L-546"><span class="linenos">546</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="L-547"><a href="#L-547"><span class="linenos">547</span></a> +</span><span id="L-548"><a href="#L-548"><span class="linenos">548</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> +</span><span id="L-549"><a href="#L-549"><span class="linenos">549</span></a><span class="sd"> """</span> +</span><span id="L-550"><a href="#L-550"><span class="linenos">550</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-551"><a href="#L-551"><span class="linenos">551</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-552"><a href="#L-552"><span class="linenos">552</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="L-553"><a href="#L-553"><span class="linenos">553</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> </span></pre></div> @@ -619,51 +639,60 @@ <div class="attr function"> <span class="def">def</span> - <span class="name">qualify_columns</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">schema</span>, </span><span class="param"><span class="n">expand_laterals</span><span class="o">=</span><span class="kc">True</span></span><span class="return-annotation">):</span></span> + <span class="name">qualify_columns</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span>,</span><span class="param"> <span class="n">schema</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="n"><a href="../schema.html#Schema">sqlglot.schema.Schema</a></span>,</span><span class="param"> <span class="n">expand_alias_refs</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span>,</span><span class="param"> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span></span><span class="return-annotation">) -> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span>:</span></span> <label class="view-source-button" for="qualify_columns-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#qualify_columns"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="qualify_columns-12"><a href="#qualify_columns-12"><span class="linenos">12</span></a><span class="k">def</span> <span class="nf">qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">expand_laterals</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="qualify_columns-13"><a href="#qualify_columns-13"><span class="linenos">13</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="qualify_columns-14"><a href="#qualify_columns-14"><span class="linenos">14</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</span> -</span><span id="qualify_columns-15"><a href="#qualify_columns-15"><span class="linenos">15</span></a> -</span><span id="qualify_columns-16"><a href="#qualify_columns-16"><span class="linenos">16</span></a><span class="sd"> Example:</span> -</span><span id="qualify_columns-17"><a href="#qualify_columns-17"><span class="linenos">17</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="qualify_columns-18"><a href="#qualify_columns-18"><span class="linenos">18</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span> -</span><span id="qualify_columns-19"><a href="#qualify_columns-19"><span class="linenos">19</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span> -</span><span id="qualify_columns-20"><a href="#qualify_columns-20"><span class="linenos">20</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span> -</span><span id="qualify_columns-21"><a href="#qualify_columns-21"><span class="linenos">21</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="qualify_columns-14"><a href="#qualify_columns-14"><span class="linenos">14</span></a><span class="k">def</span> <span class="nf">qualify_columns</span><span class="p">(</span> +</span><span id="qualify_columns-15"><a href="#qualify_columns-15"><span class="linenos">15</span></a> <span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">,</span> +</span><span id="qualify_columns-16"><a href="#qualify_columns-16"><span class="linenos">16</span></a> <span class="n">schema</span><span class="p">:</span> <span class="nb">dict</span> <span class="o">|</span> <span class="n">Schema</span><span class="p">,</span> +</span><span id="qualify_columns-17"><a href="#qualify_columns-17"><span class="linenos">17</span></a> <span class="n">expand_alias_refs</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> +</span><span id="qualify_columns-18"><a href="#qualify_columns-18"><span class="linenos">18</span></a> <span class="n">infer_schema</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> +</span><span id="qualify_columns-19"><a href="#qualify_columns-19"><span class="linenos">19</span></a><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="qualify_columns-20"><a href="#qualify_columns-20"><span class="linenos">20</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="qualify_columns-21"><a href="#qualify_columns-21"><span class="linenos">21</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified columns.</span> </span><span id="qualify_columns-22"><a href="#qualify_columns-22"><span class="linenos">22</span></a> -</span><span id="qualify_columns-23"><a href="#qualify_columns-23"><span class="linenos">23</span></a><span class="sd"> Args:</span> -</span><span id="qualify_columns-24"><a href="#qualify_columns-24"><span class="linenos">24</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> -</span><span id="qualify_columns-25"><a href="#qualify_columns-25"><span class="linenos">25</span></a><span class="sd"> schema (dict|sqlglot.optimizer.Schema): Database schema</span> -</span><span id="qualify_columns-26"><a href="#qualify_columns-26"><span class="linenos">26</span></a><span class="sd"> Returns:</span> -</span><span id="qualify_columns-27"><a href="#qualify_columns-27"><span class="linenos">27</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> -</span><span id="qualify_columns-28"><a href="#qualify_columns-28"><span class="linenos">28</span></a><span class="sd"> """</span> -</span><span id="qualify_columns-29"><a href="#qualify_columns-29"><span class="linenos">29</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> -</span><span id="qualify_columns-30"><a href="#qualify_columns-30"><span class="linenos">30</span></a> -</span><span id="qualify_columns-31"><a href="#qualify_columns-31"><span class="linenos">31</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">mapping</span> <span class="ow">and</span> <span class="n">expand_laterals</span><span class="p">:</span> -</span><span id="qualify_columns-32"><a href="#qualify_columns-32"><span class="linenos">32</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">_expand_laterals</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="qualify_columns-33"><a href="#qualify_columns-33"><span class="linenos">33</span></a> -</span><span id="qualify_columns-34"><a href="#qualify_columns-34"><span class="linenos">34</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="qualify_columns-35"><a href="#qualify_columns-35"><span class="linenos">35</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">)</span> -</span><span id="qualify_columns-36"><a href="#qualify_columns-36"><span class="linenos">36</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> -</span><span id="qualify_columns-37"><a href="#qualify_columns-37"><span class="linenos">37</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> -</span><span id="qualify_columns-38"><a href="#qualify_columns-38"><span class="linenos">38</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="qualify_columns-39"><a href="#qualify_columns-39"><span class="linenos">39</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="qualify_columns-40"><a href="#qualify_columns-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="qualify_columns-41"><a href="#qualify_columns-41"><span class="linenos">41</span></a> <span class="n">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">)</span> -</span><span id="qualify_columns-42"><a href="#qualify_columns-42"><span class="linenos">42</span></a> <span class="n">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="qualify_columns-43"><a href="#qualify_columns-43"><span class="linenos">43</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="qualify_columns-44"><a href="#qualify_columns-44"><span class="linenos">44</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> -</span><span id="qualify_columns-45"><a href="#qualify_columns-45"><span class="linenos">45</span></a> <span class="n">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="qualify_columns-23"><a href="#qualify_columns-23"><span class="linenos">23</span></a><span class="sd"> Example:</span> +</span><span id="qualify_columns-24"><a href="#qualify_columns-24"><span class="linenos">24</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="qualify_columns-25"><a href="#qualify_columns-25"><span class="linenos">25</span></a><span class="sd"> >>> schema = {"tbl": {"col": "INT"}}</span> +</span><span id="qualify_columns-26"><a href="#qualify_columns-26"><span class="linenos">26</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT col FROM tbl")</span> +</span><span id="qualify_columns-27"><a href="#qualify_columns-27"><span class="linenos">27</span></a><span class="sd"> >>> qualify_columns(expression, schema).sql()</span> +</span><span id="qualify_columns-28"><a href="#qualify_columns-28"><span class="linenos">28</span></a><span class="sd"> 'SELECT tbl.col AS col FROM tbl'</span> +</span><span id="qualify_columns-29"><a href="#qualify_columns-29"><span class="linenos">29</span></a> +</span><span id="qualify_columns-30"><a href="#qualify_columns-30"><span class="linenos">30</span></a><span class="sd"> Args:</span> +</span><span id="qualify_columns-31"><a href="#qualify_columns-31"><span class="linenos">31</span></a><span class="sd"> expression: expression to qualify</span> +</span><span id="qualify_columns-32"><a href="#qualify_columns-32"><span class="linenos">32</span></a><span class="sd"> schema: Database schema</span> +</span><span id="qualify_columns-33"><a href="#qualify_columns-33"><span class="linenos">33</span></a><span class="sd"> expand_alias_refs: whether or not to expand references to aliases</span> +</span><span id="qualify_columns-34"><a href="#qualify_columns-34"><span class="linenos">34</span></a><span class="sd"> infer_schema: whether or not to infer the schema if missing</span> +</span><span id="qualify_columns-35"><a href="#qualify_columns-35"><span class="linenos">35</span></a><span class="sd"> Returns:</span> +</span><span id="qualify_columns-36"><a href="#qualify_columns-36"><span class="linenos">36</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> +</span><span id="qualify_columns-37"><a href="#qualify_columns-37"><span class="linenos">37</span></a><span class="sd"> """</span> +</span><span id="qualify_columns-38"><a href="#qualify_columns-38"><span class="linenos">38</span></a> <span class="n">schema</span> <span class="o">=</span> <span class="n">ensure_schema</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span> +</span><span id="qualify_columns-39"><a href="#qualify_columns-39"><span class="linenos">39</span></a> <span class="n">infer_schema</span> <span class="o">=</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="k">if</span> <span class="n">infer_schema</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">infer_schema</span> +</span><span id="qualify_columns-40"><a href="#qualify_columns-40"><span class="linenos">40</span></a> +</span><span id="qualify_columns-41"><a href="#qualify_columns-41"><span class="linenos">41</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="qualify_columns-42"><a href="#qualify_columns-42"><span class="linenos">42</span></a> <span class="n">resolver</span> <span class="o">=</span> <span class="n">Resolver</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="o">=</span><span class="n">infer_schema</span><span class="p">)</span> +</span><span id="qualify_columns-43"><a href="#qualify_columns-43"><span class="linenos">43</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">)</span> +</span><span id="qualify_columns-44"><a href="#qualify_columns-44"><span class="linenos">44</span></a> <span class="n">_pop_table_column_aliases</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">)</span> +</span><span id="qualify_columns-45"><a href="#qualify_columns-45"><span class="linenos">45</span></a> <span class="n">using_column_tables</span> <span class="o">=</span> <span class="n">_expand_using</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> </span><span id="qualify_columns-46"><a href="#qualify_columns-46"><span class="linenos">46</span></a> -</span><span id="qualify_columns-47"><a href="#qualify_columns-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="n">schema</span><span class="o">.</span><span class="n">mapping</span> <span class="ow">and</span> <span class="n">expand_laterals</span><span class="p">:</span> -</span><span id="qualify_columns-48"><a href="#qualify_columns-48"><span class="linenos">48</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">_expand_laterals</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="qualify_columns-47"><a href="#qualify_columns-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span> +</span><span id="qualify_columns-48"><a href="#qualify_columns-48"><span class="linenos">48</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> </span><span id="qualify_columns-49"><a href="#qualify_columns-49"><span class="linenos">49</span></a> -</span><span id="qualify_columns-50"><a href="#qualify_columns-50"><span class="linenos">50</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="qualify_columns-50"><a href="#qualify_columns-50"><span class="linenos">50</span></a> <span class="n">_qualify_columns</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> +</span><span id="qualify_columns-51"><a href="#qualify_columns-51"><span class="linenos">51</span></a> +</span><span id="qualify_columns-52"><a href="#qualify_columns-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">schema</span><span class="o">.</span><span class="n">empty</span> <span class="ow">and</span> <span class="n">expand_alias_refs</span><span class="p">:</span> +</span><span id="qualify_columns-53"><a href="#qualify_columns-53"><span class="linenos">53</span></a> <span class="n">_expand_alias_refs</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> +</span><span id="qualify_columns-54"><a href="#qualify_columns-54"><span class="linenos">54</span></a> +</span><span id="qualify_columns-55"><a href="#qualify_columns-55"><span class="linenos">55</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="qualify_columns-56"><a href="#qualify_columns-56"><span class="linenos">56</span></a> <span class="n">_expand_stars</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">,</span> <span class="n">using_column_tables</span><span class="p">)</span> +</span><span id="qualify_columns-57"><a href="#qualify_columns-57"><span class="linenos">57</span></a> <span class="n">_qualify_outputs</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="qualify_columns-58"><a href="#qualify_columns-58"><span class="linenos">58</span></a> <span class="n">_expand_group_by</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">resolver</span><span class="p">)</span> +</span><span id="qualify_columns-59"><a href="#qualify_columns-59"><span class="linenos">59</span></a> <span class="n">_expand_order_by</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="qualify_columns-60"><a href="#qualify_columns-60"><span class="linenos">60</span></a> +</span><span id="qualify_columns-61"><a href="#qualify_columns-61"><span class="linenos">61</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -685,8 +714,10 @@ <h6 id="arguments">Arguments:</h6> <ul> -<li><strong>expression (sqlglot.Expression):</strong> expression to qualify</li> -<li><strong>schema (dict|sqlglot.optimizer.Schema):</strong> Database schema</li> +<li><strong>expression:</strong> expression to qualify</li> +<li><strong>schema:</strong> Database schema</li> +<li><strong>expand_alias_refs:</strong> whether or not to expand references to aliases</li> +<li><strong>infer_schema:</strong> whether or not to infer the schema if missing</li> </ul> <h6 id="returns">Returns:</h6> @@ -709,19 +740,21 @@ </div> <a class="headerlink" href="#validate_qualify_columns"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="validate_qualify_columns-53"><a href="#validate_qualify_columns-53"><span class="linenos">53</span></a><span class="k">def</span> <span class="nf">validate_qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="validate_qualify_columns-54"><a href="#validate_qualify_columns-54"><span class="linenos">54</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span> -</span><span id="validate_qualify_columns-55"><a href="#validate_qualify_columns-55"><span class="linenos">55</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="validate_qualify_columns-56"><a href="#validate_qualify_columns-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="validate_qualify_columns-57"><a href="#validate_qualify_columns-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="validate_qualify_columns-58"><a href="#validate_qualify_columns-58"><span class="linenos">58</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> -</span><span id="validate_qualify_columns-59"><a href="#validate_qualify_columns-59"><span class="linenos">59</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span><span class="p">:</span> -</span><span id="validate_qualify_columns-60"><a href="#validate_qualify_columns-60"><span class="linenos">60</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="validate_qualify_columns-61"><a href="#validate_qualify_columns-61"><span class="linenos">61</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">' for column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">'"</span><span class="p">)</span> -</span><span id="validate_qualify_columns-62"><a href="#validate_qualify_columns-62"><span class="linenos">62</span></a> -</span><span id="validate_qualify_columns-63"><a href="#validate_qualify_columns-63"><span class="linenos">63</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> -</span><span id="validate_qualify_columns-64"><a href="#validate_qualify_columns-64"><span class="linenos">64</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="validate_qualify_columns-65"><a href="#validate_qualify_columns-65"><span class="linenos">65</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="validate_qualify_columns-64"><a href="#validate_qualify_columns-64"><span class="linenos">64</span></a><span class="k">def</span> <span class="nf">validate_qualify_columns</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="validate_qualify_columns-65"><a href="#validate_qualify_columns-65"><span class="linenos">65</span></a><span class="w"> </span><span class="sd">"""Raise an `OptimizeError` if any columns aren't qualified"""</span> +</span><span id="validate_qualify_columns-66"><a href="#validate_qualify_columns-66"><span class="linenos">66</span></a> <span class="n">unqualified_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="validate_qualify_columns-67"><a href="#validate_qualify_columns-67"><span class="linenos">67</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="validate_qualify_columns-68"><a href="#validate_qualify_columns-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="validate_qualify_columns-69"><a href="#validate_qualify_columns-69"><span class="linenos">69</span></a> <span class="n">unqualified_columns</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">unqualified_columns</span><span class="p">)</span> +</span><span id="validate_qualify_columns-70"><a href="#validate_qualify_columns-70"><span class="linenos">70</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_correlated_subquery</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">scope</span><span class="o">.</span><span class="n">pivots</span><span class="p">:</span> +</span><span id="validate_qualify_columns-71"><a href="#validate_qualify_columns-71"><span class="linenos">71</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="validate_qualify_columns-72"><a href="#validate_qualify_columns-72"><span class="linenos">72</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span> +</span><span id="validate_qualify_columns-73"><a href="#validate_qualify_columns-73"><span class="linenos">73</span></a> <span class="sa">f</span><span class="s2">"""Column '</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s2">' could not be resolved</span><span class="si">{</span><span class="sa">f</span><span class="s2">" for table: '</span><span class="si">{</span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="si">}</span><span class="s2">'"</span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">column</span><span class="o">.</span><span class="n">table</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="s1">''</span><span class="si">}</span><span class="s2">"""</span> +</span><span id="validate_qualify_columns-74"><a href="#validate_qualify_columns-74"><span class="linenos">74</span></a> <span class="p">)</span> +</span><span id="validate_qualify_columns-75"><a href="#validate_qualify_columns-75"><span class="linenos">75</span></a> +</span><span id="validate_qualify_columns-76"><a href="#validate_qualify_columns-76"><span class="linenos">76</span></a> <span class="k">if</span> <span class="n">unqualified_columns</span><span class="p">:</span> +</span><span id="validate_qualify_columns-77"><a href="#validate_qualify_columns-77"><span class="linenos">77</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Ambiguous columns: </span><span class="si">{</span><span class="n">unqualified_columns</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="validate_qualify_columns-78"><a href="#validate_qualify_columns-78"><span class="linenos">78</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -741,140 +774,141 @@ </div> <a class="headerlink" href="#Resolver"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver-401"><a href="#Resolver-401"><span class="linenos">401</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> -</span><span id="Resolver-402"><a href="#Resolver-402"><span class="linenos">402</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Resolver-403"><a href="#Resolver-403"><span class="linenos">403</span></a><span class="sd"> Helper for resolving columns.</span> -</span><span id="Resolver-404"><a href="#Resolver-404"><span class="linenos">404</span></a> -</span><span id="Resolver-405"><a href="#Resolver-405"><span class="linenos">405</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span> -</span><span id="Resolver-406"><a href="#Resolver-406"><span class="linenos">406</span></a><span class="sd"> """</span> -</span><span id="Resolver-407"><a href="#Resolver-407"><span class="linenos">407</span></a> -</span><span id="Resolver-408"><a href="#Resolver-408"><span class="linenos">408</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> -</span><span id="Resolver-409"><a href="#Resolver-409"><span class="linenos">409</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="Resolver-410"><a href="#Resolver-410"><span class="linenos">410</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> -</span><span id="Resolver-411"><a href="#Resolver-411"><span class="linenos">411</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Resolver-412"><a href="#Resolver-412"><span class="linenos">412</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Resolver-413"><a href="#Resolver-413"><span class="linenos">413</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Resolver-414"><a href="#Resolver-414"><span class="linenos">414</span></a> -</span><span id="Resolver-415"><a href="#Resolver-415"><span class="linenos">415</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> -</span><span id="Resolver-416"><a href="#Resolver-416"><span class="linenos">416</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Resolver-417"><a href="#Resolver-417"><span class="linenos">417</span></a><span class="sd"> Get the table for a column name.</span> -</span><span id="Resolver-418"><a href="#Resolver-418"><span class="linenos">418</span></a> -</span><span id="Resolver-419"><a href="#Resolver-419"><span class="linenos">419</span></a><span class="sd"> Args:</span> -</span><span id="Resolver-420"><a href="#Resolver-420"><span class="linenos">420</span></a><span class="sd"> column_name: The column name to find the table for.</span> -</span><span id="Resolver-421"><a href="#Resolver-421"><span class="linenos">421</span></a><span class="sd"> Returns:</span> -</span><span id="Resolver-422"><a href="#Resolver-422"><span class="linenos">422</span></a><span class="sd"> The table name if it can be found/inferred.</span> -</span><span id="Resolver-423"><a href="#Resolver-423"><span class="linenos">423</span></a><span class="sd"> """</span> -</span><span id="Resolver-424"><a href="#Resolver-424"><span class="linenos">424</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Resolver-425"><a href="#Resolver-425"><span class="linenos">425</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> -</span><span id="Resolver-426"><a href="#Resolver-426"><span class="linenos">426</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> -</span><span id="Resolver-427"><a href="#Resolver-427"><span class="linenos">427</span></a> <span class="p">)</span> -</span><span id="Resolver-428"><a href="#Resolver-428"><span class="linenos">428</span></a> -</span><span id="Resolver-429"><a href="#Resolver-429"><span class="linenos">429</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> -</span><span id="Resolver-430"><a href="#Resolver-430"><span class="linenos">430</span></a> -</span><span id="Resolver-431"><a href="#Resolver-431"><span class="linenos">431</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="Resolver-432"><a href="#Resolver-432"><span class="linenos">432</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> -</span><span id="Resolver-433"><a href="#Resolver-433"><span class="linenos">433</span></a> <span class="n">source</span> -</span><span id="Resolver-434"><a href="#Resolver-434"><span class="linenos">434</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="Resolver-435"><a href="#Resolver-435"><span class="linenos">435</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="Resolver-436"><a href="#Resolver-436"><span class="linenos">436</span></a> <span class="p">)</span> -</span><span id="Resolver-437"><a href="#Resolver-437"><span class="linenos">437</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="Resolver-438"><a href="#Resolver-438"><span class="linenos">438</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="Resolver-439"><a href="#Resolver-439"><span class="linenos">439</span></a> -</span><span id="Resolver-440"><a href="#Resolver-440"><span class="linenos">440</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> -</span><span id="Resolver-441"><a href="#Resolver-441"><span class="linenos">441</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="Resolver-442"><a href="#Resolver-442"><span class="linenos">442</span></a> -</span><span id="Resolver-443"><a href="#Resolver-443"><span class="linenos">443</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="Resolver-444"><a href="#Resolver-444"><span class="linenos">444</span></a> -</span><span id="Resolver-445"><a href="#Resolver-445"><span class="linenos">445</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="Resolver-446"><a href="#Resolver-446"><span class="linenos">446</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="Resolver-447"><a href="#Resolver-447"><span class="linenos">447</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver-420"><a href="#Resolver-420"><span class="linenos">420</span></a><span class="k">class</span> <span class="nc">Resolver</span><span class="p">:</span> +</span><span id="Resolver-421"><a href="#Resolver-421"><span class="linenos">421</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-422"><a href="#Resolver-422"><span class="linenos">422</span></a><span class="sd"> Helper for resolving columns.</span> +</span><span id="Resolver-423"><a href="#Resolver-423"><span class="linenos">423</span></a> +</span><span id="Resolver-424"><a href="#Resolver-424"><span class="linenos">424</span></a><span class="sd"> This is a class so we can lazily load some things and easily share them across functions.</span> +</span><span id="Resolver-425"><a href="#Resolver-425"><span class="linenos">425</span></a><span class="sd"> """</span> +</span><span id="Resolver-426"><a href="#Resolver-426"><span class="linenos">426</span></a> +</span><span id="Resolver-427"><a href="#Resolver-427"><span class="linenos">427</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">):</span> +</span><span id="Resolver-428"><a href="#Resolver-428"><span class="linenos">428</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="Resolver-429"><a href="#Resolver-429"><span class="linenos">429</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> +</span><span id="Resolver-430"><a href="#Resolver-430"><span class="linenos">430</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-431"><a href="#Resolver-431"><span class="linenos">431</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-432"><a href="#Resolver-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver-433"><a href="#Resolver-433"><span class="linenos">433</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span> +</span><span id="Resolver-434"><a href="#Resolver-434"><span class="linenos">434</span></a> +</span><span id="Resolver-435"><a href="#Resolver-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> +</span><span id="Resolver-436"><a href="#Resolver-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-437"><a href="#Resolver-437"><span class="linenos">437</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="Resolver-438"><a href="#Resolver-438"><span class="linenos">438</span></a> +</span><span id="Resolver-439"><a href="#Resolver-439"><span class="linenos">439</span></a><span class="sd"> Args:</span> +</span><span id="Resolver-440"><a href="#Resolver-440"><span class="linenos">440</span></a><span class="sd"> column_name: The column name to find the table for.</span> +</span><span id="Resolver-441"><a href="#Resolver-441"><span class="linenos">441</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver-442"><a href="#Resolver-442"><span class="linenos">442</span></a><span class="sd"> The table name if it can be found/inferred.</span> +</span><span id="Resolver-443"><a href="#Resolver-443"><span class="linenos">443</span></a><span class="sd"> """</span> +</span><span id="Resolver-444"><a href="#Resolver-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-445"><a href="#Resolver-445"><span class="linenos">445</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> +</span><span id="Resolver-446"><a href="#Resolver-446"><span class="linenos">446</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> +</span><span id="Resolver-447"><a href="#Resolver-447"><span class="linenos">447</span></a> <span class="p">)</span> </span><span id="Resolver-448"><a href="#Resolver-448"><span class="linenos">448</span></a> -</span><span id="Resolver-449"><a href="#Resolver-449"><span class="linenos">449</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="Resolver-450"><a href="#Resolver-450"><span class="linenos">450</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> -</span><span id="Resolver-451"><a href="#Resolver-451"><span class="linenos">451</span></a> <span class="k">return</span> <span class="n">node_alias</span><span class="o">.</span><span class="n">this</span> -</span><span id="Resolver-452"><a href="#Resolver-452"><span class="linenos">452</span></a> -</span><span id="Resolver-453"><a href="#Resolver-453"><span class="linenos">453</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> -</span><span id="Resolver-454"><a href="#Resolver-454"><span class="linenos">454</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> -</span><span id="Resolver-455"><a href="#Resolver-455"><span class="linenos">455</span></a> <span class="p">)</span> -</span><span id="Resolver-456"><a href="#Resolver-456"><span class="linenos">456</span></a> -</span><span id="Resolver-457"><a href="#Resolver-457"><span class="linenos">457</span></a> <span class="nd">@property</span> -</span><span id="Resolver-458"><a href="#Resolver-458"><span class="linenos">458</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Resolver-459"><a href="#Resolver-459"><span class="linenos">459</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> -</span><span id="Resolver-460"><a href="#Resolver-460"><span class="linenos">460</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Resolver-461"><a href="#Resolver-461"><span class="linenos">461</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="Resolver-462"><a href="#Resolver-462"><span class="linenos">462</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="Resolver-463"><a href="#Resolver-463"><span class="linenos">463</span></a> <span class="p">}</span> -</span><span id="Resolver-464"><a href="#Resolver-464"><span class="linenos">464</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> -</span><span id="Resolver-465"><a href="#Resolver-465"><span class="linenos">465</span></a> -</span><span id="Resolver-466"><a href="#Resolver-466"><span class="linenos">466</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="Resolver-467"><a href="#Resolver-467"><span class="linenos">467</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> -</span><span id="Resolver-468"><a href="#Resolver-468"><span class="linenos">468</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="Resolver-469"><a href="#Resolver-469"><span class="linenos">469</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="Resolver-470"><a href="#Resolver-470"><span class="linenos">470</span></a> -</span><span id="Resolver-471"><a href="#Resolver-471"><span class="linenos">471</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="Resolver-449"><a href="#Resolver-449"><span class="linenos">449</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="Resolver-450"><a href="#Resolver-450"><span class="linenos">450</span></a> +</span><span id="Resolver-451"><a href="#Resolver-451"><span class="linenos">451</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span> +</span><span id="Resolver-452"><a href="#Resolver-452"><span class="linenos">452</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="Resolver-453"><a href="#Resolver-453"><span class="linenos">453</span></a> <span class="n">source</span> +</span><span id="Resolver-454"><a href="#Resolver-454"><span class="linenos">454</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="Resolver-455"><a href="#Resolver-455"><span class="linenos">455</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver-456"><a href="#Resolver-456"><span class="linenos">456</span></a> <span class="p">)</span> +</span><span id="Resolver-457"><a href="#Resolver-457"><span class="linenos">457</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="Resolver-458"><a href="#Resolver-458"><span class="linenos">458</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver-459"><a href="#Resolver-459"><span class="linenos">459</span></a> +</span><span id="Resolver-460"><a href="#Resolver-460"><span class="linenos">460</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> +</span><span id="Resolver-461"><a href="#Resolver-461"><span class="linenos">461</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="Resolver-462"><a href="#Resolver-462"><span class="linenos">462</span></a> +</span><span id="Resolver-463"><a href="#Resolver-463"><span class="linenos">463</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="Resolver-464"><a href="#Resolver-464"><span class="linenos">464</span></a> +</span><span id="Resolver-465"><a href="#Resolver-465"><span class="linenos">465</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> +</span><span id="Resolver-466"><a href="#Resolver-466"><span class="linenos">466</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> +</span><span id="Resolver-467"><a href="#Resolver-467"><span class="linenos">467</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="Resolver-468"><a href="#Resolver-468"><span class="linenos">468</span></a> +</span><span id="Resolver-469"><a href="#Resolver-469"><span class="linenos">469</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="Resolver-470"><a href="#Resolver-470"><span class="linenos">470</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> +</span><span id="Resolver-471"><a href="#Resolver-471"><span class="linenos">471</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> </span><span id="Resolver-472"><a href="#Resolver-472"><span class="linenos">472</span></a> -</span><span id="Resolver-473"><a href="#Resolver-473"><span class="linenos">473</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> -</span><span id="Resolver-474"><a href="#Resolver-474"><span class="linenos">474</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="Resolver-475"><a href="#Resolver-475"><span class="linenos">475</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="Resolver-473"><a href="#Resolver-473"><span class="linenos">473</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> +</span><span id="Resolver-474"><a href="#Resolver-474"><span class="linenos">474</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> +</span><span id="Resolver-475"><a href="#Resolver-475"><span class="linenos">475</span></a> <span class="p">)</span> </span><span id="Resolver-476"><a href="#Resolver-476"><span class="linenos">476</span></a> -</span><span id="Resolver-477"><a href="#Resolver-477"><span class="linenos">477</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> -</span><span id="Resolver-478"><a href="#Resolver-478"><span class="linenos">478</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> -</span><span id="Resolver-479"><a href="#Resolver-479"><span class="linenos">479</span></a> -</span><span id="Resolver-480"><a href="#Resolver-480"><span class="linenos">480</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> -</span><span id="Resolver-481"><a href="#Resolver-481"><span class="linenos">481</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> -</span><span id="Resolver-482"><a href="#Resolver-482"><span class="linenos">482</span></a> -</span><span id="Resolver-483"><a href="#Resolver-483"><span class="linenos">483</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Resolver-484"><a href="#Resolver-484"><span class="linenos">484</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Resolver-485"><a href="#Resolver-485"><span class="linenos">485</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="Resolver-486"><a href="#Resolver-486"><span class="linenos">486</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> -</span><span id="Resolver-487"><a href="#Resolver-487"><span class="linenos">487</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="Resolver-488"><a href="#Resolver-488"><span class="linenos">488</span></a> <span class="p">}</span> -</span><span id="Resolver-489"><a href="#Resolver-489"><span class="linenos">489</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="Resolver-477"><a href="#Resolver-477"><span class="linenos">477</span></a> <span class="nd">@property</span> +</span><span id="Resolver-478"><a href="#Resolver-478"><span class="linenos">478</span></a> <span class="k">def</span> <span class="nf">all_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Resolver-479"><a href="#Resolver-479"><span class="linenos">479</span></a><span class="w"> </span><span class="sd">"""All available columns of all sources in this scope"""</span> +</span><span id="Resolver-480"><a href="#Resolver-480"><span class="linenos">480</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-481"><a href="#Resolver-481"><span class="linenos">481</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="Resolver-482"><a href="#Resolver-482"><span class="linenos">482</span></a> <span class="n">column</span> <span class="k">for</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver-483"><a href="#Resolver-483"><span class="linenos">483</span></a> <span class="p">}</span> +</span><span id="Resolver-484"><a href="#Resolver-484"><span class="linenos">484</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> +</span><span id="Resolver-485"><a href="#Resolver-485"><span class="linenos">485</span></a> +</span><span id="Resolver-486"><a href="#Resolver-486"><span class="linenos">486</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="Resolver-487"><a href="#Resolver-487"><span class="linenos">487</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="Resolver-488"><a href="#Resolver-488"><span class="linenos">488</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="Resolver-489"><a href="#Resolver-489"><span class="linenos">489</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> </span><span id="Resolver-490"><a href="#Resolver-490"><span class="linenos">490</span></a> -</span><span id="Resolver-491"><a href="#Resolver-491"><span class="linenos">491</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> -</span><span id="Resolver-492"><a href="#Resolver-492"><span class="linenos">492</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Resolver-493"><a href="#Resolver-493"><span class="linenos">493</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> -</span><span id="Resolver-494"><a href="#Resolver-494"><span class="linenos">494</span></a> -</span><span id="Resolver-495"><a href="#Resolver-495"><span class="linenos">495</span></a><span class="sd"> Args:</span> -</span><span id="Resolver-496"><a href="#Resolver-496"><span class="linenos">496</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> -</span><span id="Resolver-497"><a href="#Resolver-497"><span class="linenos">497</span></a><span class="sd"> Returns:</span> -</span><span id="Resolver-498"><a href="#Resolver-498"><span class="linenos">498</span></a><span class="sd"> dict: Mapping of column name to source name</span> -</span><span id="Resolver-499"><a href="#Resolver-499"><span class="linenos">499</span></a><span class="sd"> """</span> -</span><span id="Resolver-500"><a href="#Resolver-500"><span class="linenos">500</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> -</span><span id="Resolver-501"><a href="#Resolver-501"><span class="linenos">501</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="Resolver-491"><a href="#Resolver-491"><span class="linenos">491</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="Resolver-492"><a href="#Resolver-492"><span class="linenos">492</span></a> +</span><span id="Resolver-493"><a href="#Resolver-493"><span class="linenos">493</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="Resolver-494"><a href="#Resolver-494"><span class="linenos">494</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="Resolver-495"><a href="#Resolver-495"><span class="linenos">495</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="Resolver-496"><a href="#Resolver-496"><span class="linenos">496</span></a> +</span><span id="Resolver-497"><a href="#Resolver-497"><span class="linenos">497</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="Resolver-498"><a href="#Resolver-498"><span class="linenos">498</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="Resolver-499"><a href="#Resolver-499"><span class="linenos">499</span></a> +</span><span id="Resolver-500"><a href="#Resolver-500"><span class="linenos">500</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="Resolver-501"><a href="#Resolver-501"><span class="linenos">501</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> </span><span id="Resolver-502"><a href="#Resolver-502"><span class="linenos">502</span></a> -</span><span id="Resolver-503"><a href="#Resolver-503"><span class="linenos">503</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> -</span><span id="Resolver-504"><a href="#Resolver-504"><span class="linenos">504</span></a> -</span><span id="Resolver-505"><a href="#Resolver-505"><span class="linenos">505</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="Resolver-506"><a href="#Resolver-506"><span class="linenos">506</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> -</span><span id="Resolver-507"><a href="#Resolver-507"><span class="linenos">507</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> -</span><span id="Resolver-508"><a href="#Resolver-508"><span class="linenos">508</span></a> -</span><span id="Resolver-509"><a href="#Resolver-509"><span class="linenos">509</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> -</span><span id="Resolver-510"><a href="#Resolver-510"><span class="linenos">510</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="Resolver-511"><a href="#Resolver-511"><span class="linenos">511</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> -</span><span id="Resolver-512"><a href="#Resolver-512"><span class="linenos">512</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> -</span><span id="Resolver-513"><a href="#Resolver-513"><span class="linenos">513</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> -</span><span id="Resolver-514"><a href="#Resolver-514"><span class="linenos">514</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="Resolver-515"><a href="#Resolver-515"><span class="linenos">515</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> -</span><span id="Resolver-516"><a href="#Resolver-516"><span class="linenos">516</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> -</span><span id="Resolver-517"><a href="#Resolver-517"><span class="linenos">517</span></a> -</span><span id="Resolver-518"><a href="#Resolver-518"><span class="linenos">518</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> -</span><span id="Resolver-519"><a href="#Resolver-519"><span class="linenos">519</span></a> -</span><span id="Resolver-520"><a href="#Resolver-520"><span class="linenos">520</span></a> <span class="nd">@staticmethod</span> -</span><span id="Resolver-521"><a href="#Resolver-521"><span class="linenos">521</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> -</span><span id="Resolver-522"><a href="#Resolver-522"><span class="linenos">522</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Resolver-523"><a href="#Resolver-523"><span class="linenos">523</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="Resolver-503"><a href="#Resolver-503"><span class="linenos">503</span></a> <span class="k">def</span> <span class="nf">_get_all_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Resolver-504"><a href="#Resolver-504"><span class="linenos">504</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver-505"><a href="#Resolver-505"><span class="linenos">505</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="Resolver-506"><a href="#Resolver-506"><span class="linenos">506</span></a> <span class="n">k</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_source_columns</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> +</span><span id="Resolver-507"><a href="#Resolver-507"><span class="linenos">507</span></a> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="Resolver-508"><a href="#Resolver-508"><span class="linenos">508</span></a> <span class="p">}</span> +</span><span id="Resolver-509"><a href="#Resolver-509"><span class="linenos">509</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> +</span><span id="Resolver-510"><a href="#Resolver-510"><span class="linenos">510</span></a> +</span><span id="Resolver-511"><a href="#Resolver-511"><span class="linenos">511</span></a> <span class="k">def</span> <span class="nf">_get_unambiguous_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_columns</span><span class="p">):</span> +</span><span id="Resolver-512"><a href="#Resolver-512"><span class="linenos">512</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-513"><a href="#Resolver-513"><span class="linenos">513</span></a><span class="sd"> Find all the unambiguous columns in sources.</span> +</span><span id="Resolver-514"><a href="#Resolver-514"><span class="linenos">514</span></a> +</span><span id="Resolver-515"><a href="#Resolver-515"><span class="linenos">515</span></a><span class="sd"> Args:</span> +</span><span id="Resolver-516"><a href="#Resolver-516"><span class="linenos">516</span></a><span class="sd"> source_columns (dict): Mapping of names to source columns</span> +</span><span id="Resolver-517"><a href="#Resolver-517"><span class="linenos">517</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver-518"><a href="#Resolver-518"><span class="linenos">518</span></a><span class="sd"> dict: Mapping of column name to source name</span> +</span><span id="Resolver-519"><a href="#Resolver-519"><span class="linenos">519</span></a><span class="sd"> """</span> +</span><span id="Resolver-520"><a href="#Resolver-520"><span class="linenos">520</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source_columns</span><span class="p">:</span> +</span><span id="Resolver-521"><a href="#Resolver-521"><span class="linenos">521</span></a> <span class="k">return</span> <span class="p">{}</span> +</span><span id="Resolver-522"><a href="#Resolver-522"><span class="linenos">522</span></a> +</span><span id="Resolver-523"><a href="#Resolver-523"><span class="linenos">523</span></a> <span class="n">source_columns</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">source_columns</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> </span><span id="Resolver-524"><a href="#Resolver-524"><span class="linenos">524</span></a> -</span><span id="Resolver-525"><a href="#Resolver-525"><span class="linenos">525</span></a><span class="sd"> Example:</span> -</span><span id="Resolver-526"><a href="#Resolver-526"><span class="linenos">526</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> -</span><span id="Resolver-527"><a href="#Resolver-527"><span class="linenos">527</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="Resolver-525"><a href="#Resolver-525"><span class="linenos">525</span></a> <span class="n">first_table</span><span class="p">,</span> <span class="n">first_columns</span> <span class="o">=</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver-526"><a href="#Resolver-526"><span class="linenos">526</span></a> <span class="n">unambiguous_columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">col</span><span class="p">:</span> <span class="n">first_table</span> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">first_columns</span><span class="p">)}</span> +</span><span id="Resolver-527"><a href="#Resolver-527"><span class="linenos">527</span></a> <span class="n">all_columns</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">unambiguous_columns</span><span class="p">)</span> </span><span id="Resolver-528"><a href="#Resolver-528"><span class="linenos">528</span></a> -</span><span id="Resolver-529"><a href="#Resolver-529"><span class="linenos">529</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> -</span><span id="Resolver-530"><a href="#Resolver-530"><span class="linenos">530</span></a><span class="sd"> """</span> -</span><span id="Resolver-531"><a href="#Resolver-531"><span class="linenos">531</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="Resolver-532"><a href="#Resolver-532"><span class="linenos">532</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="Resolver-533"><a href="#Resolver-533"><span class="linenos">533</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="Resolver-534"><a href="#Resolver-534"><span class="linenos">534</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> +</span><span id="Resolver-529"><a href="#Resolver-529"><span class="linenos">529</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">source_columns</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span> +</span><span id="Resolver-530"><a href="#Resolver-530"><span class="linenos">530</span></a> <span class="n">unique</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="Resolver-531"><a href="#Resolver-531"><span class="linenos">531</span></a> <span class="n">ambiguous</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">all_columns</span><span class="p">)</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span> +</span><span id="Resolver-532"><a href="#Resolver-532"><span class="linenos">532</span></a> <span class="n">all_columns</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">columns</span><span class="p">)</span> +</span><span id="Resolver-533"><a href="#Resolver-533"><span class="linenos">533</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">ambiguous</span><span class="p">:</span> +</span><span id="Resolver-534"><a href="#Resolver-534"><span class="linenos">534</span></a> <span class="n">unambiguous_columns</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Resolver-535"><a href="#Resolver-535"><span class="linenos">535</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unique</span><span class="o">.</span><span class="n">difference</span><span class="p">(</span><span class="n">ambiguous</span><span class="p">):</span> +</span><span id="Resolver-536"><a href="#Resolver-536"><span class="linenos">536</span></a> <span class="n">unambiguous_columns</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">table</span> +</span><span id="Resolver-537"><a href="#Resolver-537"><span class="linenos">537</span></a> +</span><span id="Resolver-538"><a href="#Resolver-538"><span class="linenos">538</span></a> <span class="k">return</span> <span class="n">unambiguous_columns</span> +</span><span id="Resolver-539"><a href="#Resolver-539"><span class="linenos">539</span></a> +</span><span id="Resolver-540"><a href="#Resolver-540"><span class="linenos">540</span></a> <span class="nd">@staticmethod</span> +</span><span id="Resolver-541"><a href="#Resolver-541"><span class="linenos">541</span></a> <span class="k">def</span> <span class="nf">_find_unique_columns</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span> +</span><span id="Resolver-542"><a href="#Resolver-542"><span class="linenos">542</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver-543"><a href="#Resolver-543"><span class="linenos">543</span></a><span class="sd"> Find the unique columns in a list of columns.</span> +</span><span id="Resolver-544"><a href="#Resolver-544"><span class="linenos">544</span></a> +</span><span id="Resolver-545"><a href="#Resolver-545"><span class="linenos">545</span></a><span class="sd"> Example:</span> +</span><span id="Resolver-546"><a href="#Resolver-546"><span class="linenos">546</span></a><span class="sd"> >>> sorted(Resolver._find_unique_columns(["a", "b", "b", "c"]))</span> +</span><span id="Resolver-547"><a href="#Resolver-547"><span class="linenos">547</span></a><span class="sd"> ['a', 'c']</span> +</span><span id="Resolver-548"><a href="#Resolver-548"><span class="linenos">548</span></a> +</span><span id="Resolver-549"><a href="#Resolver-549"><span class="linenos">549</span></a><span class="sd"> This is necessary because duplicate column names are ambiguous.</span> +</span><span id="Resolver-550"><a href="#Resolver-550"><span class="linenos">550</span></a><span class="sd"> """</span> +</span><span id="Resolver-551"><a href="#Resolver-551"><span class="linenos">551</span></a> <span class="n">counts</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="Resolver-552"><a href="#Resolver-552"><span class="linenos">552</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="Resolver-553"><a href="#Resolver-553"><span class="linenos">553</span></a> <span class="n">counts</span><span class="p">[</span><span class="n">column</span><span class="p">]</span> <span class="o">=</span> <span class="n">counts</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="Resolver-554"><a href="#Resolver-554"><span class="linenos">554</span></a> <span class="k">return</span> <span class="p">{</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="n">counts</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">}</span> </span></pre></div> @@ -888,18 +922,19 @@ <input id="Resolver.__init__-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1"> <div class="attr function"> - <span class="name">Resolver</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">scope</span>, </span><span class="param"><span class="n">schema</span></span>)</span> + <span class="name">Resolver</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">scope</span>, </span><span class="param"><span class="n">schema</span>, </span><span class="param"><span class="n">infer_schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span></span>)</span> <label class="view-source-button" for="Resolver.__init__-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#Resolver.__init__"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.__init__-408"><a href="#Resolver.__init__-408"><span class="linenos">408</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">):</span> -</span><span id="Resolver.__init__-409"><a href="#Resolver.__init__-409"><span class="linenos">409</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="Resolver.__init__-410"><a href="#Resolver.__init__-410"><span class="linenos">410</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> -</span><span id="Resolver.__init__-411"><a href="#Resolver.__init__-411"><span class="linenos">411</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Resolver.__init__-412"><a href="#Resolver.__init__-412"><span class="linenos">412</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Resolver.__init__-413"><a href="#Resolver.__init__-413"><span class="linenos">413</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.__init__-427"><a href="#Resolver.__init__-427"><span class="linenos">427</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">scope</span><span class="p">,</span> <span class="n">schema</span><span class="p">,</span> <span class="n">infer_schema</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">):</span> +</span><span id="Resolver.__init__-428"><a href="#Resolver.__init__-428"><span class="linenos">428</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span> <span class="o">=</span> <span class="n">scope</span> +</span><span id="Resolver.__init__-429"><a href="#Resolver.__init__-429"><span class="linenos">429</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> +</span><span id="Resolver.__init__-430"><a href="#Resolver.__init__-430"><span class="linenos">430</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_source_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver.__init__-431"><a href="#Resolver.__init__-431"><span class="linenos">431</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver.__init__-432"><a href="#Resolver.__init__-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_all_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Resolver.__init__-433"><a href="#Resolver.__init__-433"><span class="linenos">433</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span> <span class="o">=</span> <span class="n">infer_schema</span> </span></pre></div> @@ -917,47 +952,47 @@ </div> <a class="headerlink" href="#Resolver.get_table"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_table-415"><a href="#Resolver.get_table-415"><span class="linenos">415</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> -</span><span id="Resolver.get_table-416"><a href="#Resolver.get_table-416"><span class="linenos">416</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Resolver.get_table-417"><a href="#Resolver.get_table-417"><span class="linenos">417</span></a><span class="sd"> Get the table for a column name.</span> -</span><span id="Resolver.get_table-418"><a href="#Resolver.get_table-418"><span class="linenos">418</span></a> -</span><span id="Resolver.get_table-419"><a href="#Resolver.get_table-419"><span class="linenos">419</span></a><span class="sd"> Args:</span> -</span><span id="Resolver.get_table-420"><a href="#Resolver.get_table-420"><span class="linenos">420</span></a><span class="sd"> column_name: The column name to find the table for.</span> -</span><span id="Resolver.get_table-421"><a href="#Resolver.get_table-421"><span class="linenos">421</span></a><span class="sd"> Returns:</span> -</span><span id="Resolver.get_table-422"><a href="#Resolver.get_table-422"><span class="linenos">422</span></a><span class="sd"> The table name if it can be found/inferred.</span> -</span><span id="Resolver.get_table-423"><a href="#Resolver.get_table-423"><span class="linenos">423</span></a><span class="sd"> """</span> -</span><span id="Resolver.get_table-424"><a href="#Resolver.get_table-424"><span class="linenos">424</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Resolver.get_table-425"><a href="#Resolver.get_table-425"><span class="linenos">425</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> -</span><span id="Resolver.get_table-426"><a href="#Resolver.get_table-426"><span class="linenos">426</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> -</span><span id="Resolver.get_table-427"><a href="#Resolver.get_table-427"><span class="linenos">427</span></a> <span class="p">)</span> -</span><span id="Resolver.get_table-428"><a href="#Resolver.get_table-428"><span class="linenos">428</span></a> -</span><span id="Resolver.get_table-429"><a href="#Resolver.get_table-429"><span class="linenos">429</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> -</span><span id="Resolver.get_table-430"><a href="#Resolver.get_table-430"><span class="linenos">430</span></a> -</span><span id="Resolver.get_table-431"><a href="#Resolver.get_table-431"><span class="linenos">431</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="Resolver.get_table-432"><a href="#Resolver.get_table-432"><span class="linenos">432</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> -</span><span id="Resolver.get_table-433"><a href="#Resolver.get_table-433"><span class="linenos">433</span></a> <span class="n">source</span> -</span><span id="Resolver.get_table-434"><a href="#Resolver.get_table-434"><span class="linenos">434</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="Resolver.get_table-435"><a href="#Resolver.get_table-435"><span class="linenos">435</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> -</span><span id="Resolver.get_table-436"><a href="#Resolver.get_table-436"><span class="linenos">436</span></a> <span class="p">)</span> -</span><span id="Resolver.get_table-437"><a href="#Resolver.get_table-437"><span class="linenos">437</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="Resolver.get_table-438"><a href="#Resolver.get_table-438"><span class="linenos">438</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="Resolver.get_table-439"><a href="#Resolver.get_table-439"><span class="linenos">439</span></a> -</span><span id="Resolver.get_table-440"><a href="#Resolver.get_table-440"><span class="linenos">440</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> -</span><span id="Resolver.get_table-441"><a href="#Resolver.get_table-441"><span class="linenos">441</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="Resolver.get_table-442"><a href="#Resolver.get_table-442"><span class="linenos">442</span></a> -</span><span id="Resolver.get_table-443"><a href="#Resolver.get_table-443"><span class="linenos">443</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> -</span><span id="Resolver.get_table-444"><a href="#Resolver.get_table-444"><span class="linenos">444</span></a> -</span><span id="Resolver.get_table-445"><a href="#Resolver.get_table-445"><span class="linenos">445</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="Resolver.get_table-446"><a href="#Resolver.get_table-446"><span class="linenos">446</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> -</span><span id="Resolver.get_table-447"><a href="#Resolver.get_table-447"><span class="linenos">447</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_table-435"><a href="#Resolver.get_table-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="nf">get_table</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">column_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">]:</span> +</span><span id="Resolver.get_table-436"><a href="#Resolver.get_table-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Resolver.get_table-437"><a href="#Resolver.get_table-437"><span class="linenos">437</span></a><span class="sd"> Get the table for a column name.</span> +</span><span id="Resolver.get_table-438"><a href="#Resolver.get_table-438"><span class="linenos">438</span></a> +</span><span id="Resolver.get_table-439"><a href="#Resolver.get_table-439"><span class="linenos">439</span></a><span class="sd"> Args:</span> +</span><span id="Resolver.get_table-440"><a href="#Resolver.get_table-440"><span class="linenos">440</span></a><span class="sd"> column_name: The column name to find the table for.</span> +</span><span id="Resolver.get_table-441"><a href="#Resolver.get_table-441"><span class="linenos">441</span></a><span class="sd"> Returns:</span> +</span><span id="Resolver.get_table-442"><a href="#Resolver.get_table-442"><span class="linenos">442</span></a><span class="sd"> The table name if it can be found/inferred.</span> +</span><span id="Resolver.get_table-443"><a href="#Resolver.get_table-443"><span class="linenos">443</span></a><span class="sd"> """</span> +</span><span id="Resolver.get_table-444"><a href="#Resolver.get_table-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Resolver.get_table-445"><a href="#Resolver.get_table-445"><span class="linenos">445</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_unambiguous_columns</span><span class="p">(</span> +</span><span id="Resolver.get_table-446"><a href="#Resolver.get_table-446"><span class="linenos">446</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span> +</span><span id="Resolver.get_table-447"><a href="#Resolver.get_table-447"><span class="linenos">447</span></a> <span class="p">)</span> </span><span id="Resolver.get_table-448"><a href="#Resolver.get_table-448"><span class="linenos">448</span></a> -</span><span id="Resolver.get_table-449"><a href="#Resolver.get_table-449"><span class="linenos">449</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> -</span><span id="Resolver.get_table-450"><a href="#Resolver.get_table-450"><span class="linenos">450</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> -</span><span id="Resolver.get_table-451"><a href="#Resolver.get_table-451"><span class="linenos">451</span></a> <span class="k">return</span> <span class="n">node_alias</span><span class="o">.</span><span class="n">this</span> -</span><span id="Resolver.get_table-452"><a href="#Resolver.get_table-452"><span class="linenos">452</span></a> -</span><span id="Resolver.get_table-453"><a href="#Resolver.get_table-453"><span class="linenos">453</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> -</span><span id="Resolver.get_table-454"><a href="#Resolver.get_table-454"><span class="linenos">454</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> -</span><span id="Resolver.get_table-455"><a href="#Resolver.get_table-455"><span class="linenos">455</span></a> <span class="p">)</span> +</span><span id="Resolver.get_table-449"><a href="#Resolver.get_table-449"><span class="linenos">449</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_unambiguous_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">column_name</span><span class="p">)</span> +</span><span id="Resolver.get_table-450"><a href="#Resolver.get_table-450"><span class="linenos">450</span></a> +</span><span id="Resolver.get_table-451"><a href="#Resolver.get_table-451"><span class="linenos">451</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_name</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_infer_schema</span><span class="p">:</span> +</span><span id="Resolver.get_table-452"><a href="#Resolver.get_table-452"><span class="linenos">452</span></a> <span class="n">sources_without_schema</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span> +</span><span id="Resolver.get_table-453"><a href="#Resolver.get_table-453"><span class="linenos">453</span></a> <span class="n">source</span> +</span><span id="Resolver.get_table-454"><a href="#Resolver.get_table-454"><span class="linenos">454</span></a> <span class="k">for</span> <span class="n">source</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_all_source_columns</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="Resolver.get_table-455"><a href="#Resolver.get_table-455"><span class="linenos">455</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">columns</span> <span class="ow">or</span> <span class="s2">"*"</span> <span class="ow">in</span> <span class="n">columns</span> +</span><span id="Resolver.get_table-456"><a href="#Resolver.get_table-456"><span class="linenos">456</span></a> <span class="p">)</span> +</span><span id="Resolver.get_table-457"><a href="#Resolver.get_table-457"><span class="linenos">457</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">sources_without_schema</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="Resolver.get_table-458"><a href="#Resolver.get_table-458"><span class="linenos">458</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">sources_without_schema</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="Resolver.get_table-459"><a href="#Resolver.get_table-459"><span class="linenos">459</span></a> +</span><span id="Resolver.get_table-460"><a href="#Resolver.get_table-460"><span class="linenos">460</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">:</span> +</span><span id="Resolver.get_table-461"><a href="#Resolver.get_table-461"><span class="linenos">461</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="Resolver.get_table-462"><a href="#Resolver.get_table-462"><span class="linenos">462</span></a> +</span><span id="Resolver.get_table-463"><a href="#Resolver.get_table-463"><span class="linenos">463</span></a> <span class="n">node</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">table_name</span><span class="p">)</span> +</span><span id="Resolver.get_table-464"><a href="#Resolver.get_table-464"><span class="linenos">464</span></a> +</span><span id="Resolver.get_table-465"><a href="#Resolver.get_table-465"><span class="linenos">465</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> +</span><span id="Resolver.get_table-466"><a href="#Resolver.get_table-466"><span class="linenos">466</span></a> <span class="k">while</span> <span class="n">node</span> <span class="ow">and</span> <span class="n">node</span><span class="o">.</span><span class="n">alias</span> <span class="o">!=</span> <span class="n">table_name</span><span class="p">:</span> +</span><span id="Resolver.get_table-467"><a href="#Resolver.get_table-467"><span class="linenos">467</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> +</span><span id="Resolver.get_table-468"><a href="#Resolver.get_table-468"><span class="linenos">468</span></a> +</span><span id="Resolver.get_table-469"><a href="#Resolver.get_table-469"><span class="linenos">469</span></a> <span class="n">node_alias</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> +</span><span id="Resolver.get_table-470"><a href="#Resolver.get_table-470"><span class="linenos">470</span></a> <span class="k">if</span> <span class="n">node_alias</span><span class="p">:</span> +</span><span id="Resolver.get_table-471"><a href="#Resolver.get_table-471"><span class="linenos">471</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">node_alias</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> +</span><span id="Resolver.get_table-472"><a href="#Resolver.get_table-472"><span class="linenos">472</span></a> +</span><span id="Resolver.get_table-473"><a href="#Resolver.get_table-473"><span class="linenos">473</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span> +</span><span id="Resolver.get_table-474"><a href="#Resolver.get_table-474"><span class="linenos">474</span></a> <span class="n">table_name</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">quoted</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span> +</span><span id="Resolver.get_table-475"><a href="#Resolver.get_table-475"><span class="linenos">475</span></a> <span class="p">)</span> </span></pre></div> @@ -1002,22 +1037,22 @@ </div> <a class="headerlink" href="#Resolver.get_source_columns"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_source_columns-466"><a href="#Resolver.get_source_columns-466"><span class="linenos">466</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="Resolver.get_source_columns-467"><a href="#Resolver.get_source_columns-467"><span class="linenos">467</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> -</span><span id="Resolver.get_source_columns-468"><a href="#Resolver.get_source_columns-468"><span class="linenos">468</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="Resolver.get_source_columns-469"><a href="#Resolver.get_source_columns-469"><span class="linenos">469</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="Resolver.get_source_columns-470"><a href="#Resolver.get_source_columns-470"><span class="linenos">470</span></a> -</span><span id="Resolver.get_source_columns-471"><a href="#Resolver.get_source_columns-471"><span class="linenos">471</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> -</span><span id="Resolver.get_source_columns-472"><a href="#Resolver.get_source_columns-472"><span class="linenos">472</span></a> -</span><span id="Resolver.get_source_columns-473"><a href="#Resolver.get_source_columns-473"><span class="linenos">473</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> -</span><span id="Resolver.get_source_columns-474"><a href="#Resolver.get_source_columns-474"><span class="linenos">474</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="Resolver.get_source_columns-475"><a href="#Resolver.get_source_columns-475"><span class="linenos">475</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> -</span><span id="Resolver.get_source_columns-476"><a href="#Resolver.get_source_columns-476"><span class="linenos">476</span></a> -</span><span id="Resolver.get_source_columns-477"><a href="#Resolver.get_source_columns-477"><span class="linenos">477</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> -</span><span id="Resolver.get_source_columns-478"><a href="#Resolver.get_source_columns-478"><span class="linenos">478</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> -</span><span id="Resolver.get_source_columns-479"><a href="#Resolver.get_source_columns-479"><span class="linenos">479</span></a> -</span><span id="Resolver.get_source_columns-480"><a href="#Resolver.get_source_columns-480"><span class="linenos">480</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> -</span><span id="Resolver.get_source_columns-481"><a href="#Resolver.get_source_columns-481"><span class="linenos">481</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Resolver.get_source_columns-486"><a href="#Resolver.get_source_columns-486"><span class="linenos">486</span></a> <span class="k">def</span> <span class="nf">get_source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">only_visible</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-487"><a href="#Resolver.get_source_columns-487"><span class="linenos">487</span></a><span class="w"> </span><span class="sd">"""Resolve the source columns for a given source `name`"""</span> +</span><span id="Resolver.get_source_columns-488"><a href="#Resolver.get_source_columns-488"><span class="linenos">488</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="Resolver.get_source_columns-489"><a href="#Resolver.get_source_columns-489"><span class="linenos">489</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown table: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="Resolver.get_source_columns-490"><a href="#Resolver.get_source_columns-490"><span class="linenos">490</span></a> +</span><span id="Resolver.get_source_columns-491"><a href="#Resolver.get_source_columns-491"><span class="linenos">491</span></a> <span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> +</span><span id="Resolver.get_source_columns-492"><a href="#Resolver.get_source_columns-492"><span class="linenos">492</span></a> +</span><span id="Resolver.get_source_columns-493"><a href="#Resolver.get_source_columns-493"><span class="linenos">493</span></a> <span class="c1"># If referencing a table, return the columns from the schema</span> +</span><span id="Resolver.get_source_columns-494"><a href="#Resolver.get_source_columns-494"><span class="linenos">494</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-495"><a href="#Resolver.get_source_columns-495"><span class="linenos">495</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="o">.</span><span class="n">column_names</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">only_visible</span><span class="p">)</span> +</span><span id="Resolver.get_source_columns-496"><a href="#Resolver.get_source_columns-496"><span class="linenos">496</span></a> +</span><span id="Resolver.get_source_columns-497"><a href="#Resolver.get_source_columns-497"><span class="linenos">497</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">):</span> +</span><span id="Resolver.get_source_columns-498"><a href="#Resolver.get_source_columns-498"><span class="linenos">498</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span> +</span><span id="Resolver.get_source_columns-499"><a href="#Resolver.get_source_columns-499"><span class="linenos">499</span></a> +</span><span id="Resolver.get_source_columns-500"><a href="#Resolver.get_source_columns-500"><span class="linenos">500</span></a> <span class="c1"># Otherwise, if referencing another scope, return that scope's named selects</span> +</span><span id="Resolver.get_source_columns-501"><a href="#Resolver.get_source_columns-501"><span class="linenos">501</span></a> <span class="k">return</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/qualify_tables.html b/docs/sqlglot/optimizer/qualify_tables.html index 2dab7ed..4a45ddb 100644 --- a/docs/sqlglot/optimizer/qualify_tables.html +++ b/docs/sqlglot/optimizer/qualify_tables.html @@ -65,69 +65,92 @@ </span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a> </span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="k">def</span> <span class="nf">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">catalog</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> </span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables.</span> -</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a> -</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> Example:</span> -</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT 1 FROM tbl")</span> -</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="sd"> >>> qualify_tables(expression, db="db").sql()</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="sd"> 'SELECT 1 FROM db.tbl AS tbl'</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a> -</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="sd"> Args:</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a><span class="sd"> db (str): Database name</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a><span class="sd"> catalog (str): Catalog name</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a><span class="sd"> schema: A schema to populate</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a><span class="sd"> Returns:</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a><span class="sd"> """</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a> -</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a> -</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">):</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">):</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> -</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"db"</span><span class="p">):</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">):</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> -</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="n">alias</span><span class="p">(</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">name</span> <span class="k">if</span> <span class="n">name</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="p">)</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="p">)</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> -</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="p">)</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a> -</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">udtf</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">udtf</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span><span class="p">):</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">))</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> -</span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables. Additionally, this</span> +</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a><span class="sd"> replaces "join constructs" (*) by equivalent SELECT * subqueries.</span> +</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a> +</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> Examples:</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT 1 FROM tbl")</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="sd"> >>> qualify_tables(expression, db="db").sql()</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a><span class="sd"> 'SELECT 1 FROM db.tbl AS tbl'</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="sd"> >>></span> +</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT * FROM (tbl1 JOIN tbl2 ON id1 = id2)")</span> +</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a><span class="sd"> >>> qualify_tables(expression).sql()</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a><span class="sd"> 'SELECT * FROM (SELECT * FROM tbl1 AS tbl1 JOIN tbl2 AS tbl2 ON id1 = id2) AS _q_0'</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a> +</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a><span class="sd"> Args:</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a><span class="sd"> db (str): Database name</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a><span class="sd"> catalog (str): Catalog name</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a><span class="sd"> schema: A schema to populate</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> +</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a><span class="sd"> Returns:</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> +</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a><span class="sd"> (*) See section 7.2.1.2 in https://www.postgresql.org/docs/current/queries-table-expressions.html</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a><span class="sd"> """</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> +</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> +</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">):</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a> <span class="c1"># Expand join construct</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">derived_table</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="n">unnested</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnested</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"*"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">unnested</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> +</span><span id="L-46"><a href="#L-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">):</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos">47</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">next_name</span><span class="p">()</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> +</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">pivots</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">next_name</span><span class="p">())))</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> +</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"db"</span><span class="p">):</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">):</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos">62</span></a> +</span><span id="L-63"><a href="#L-63"><span class="linenos">63</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a> <span class="n">alias</span><span class="p">(</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="n">source</span><span class="p">,</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a> <span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">(),</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a> <span class="p">)</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> <span class="p">)</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos">72</span></a> +</span><span id="L-73"><a href="#L-73"><span class="linenos">73</span></a> <span class="n">pivots</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos">74</span></a> <span class="k">if</span> <span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos">75</span></a> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">next_name</span><span class="p">())))</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos">76</span></a> +</span><span id="L-77"><a href="#L-77"><span class="linenos">77</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos">78</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos">79</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos">80</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos">81</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos">82</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos">83</span></a> <span class="p">)</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos">84</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos">85</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos">86</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos">87</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos">88</span></a> +</span><span id="L-89"><a href="#L-89"><span class="linenos">89</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos">90</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos">91</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">udtf</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos">92</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">udtf</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span><span class="p">):</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos">93</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">))</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos">94</span></a> +</span><span id="L-95"><a href="#L-95"><span class="linenos">95</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -145,75 +168,99 @@ <a class="headerlink" href="#qualify_tables"></a> <div class="pdoc-code codehilite"><pre><span></span><span id="qualify_tables-9"><a href="#qualify_tables-9"><span class="linenos"> 9</span></a><span class="k">def</span> <span class="nf">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">catalog</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> </span><span id="qualify_tables-10"><a href="#qualify_tables-10"><span class="linenos">10</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="qualify_tables-11"><a href="#qualify_tables-11"><span class="linenos">11</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables.</span> -</span><span id="qualify_tables-12"><a href="#qualify_tables-12"><span class="linenos">12</span></a> -</span><span id="qualify_tables-13"><a href="#qualify_tables-13"><span class="linenos">13</span></a><span class="sd"> Example:</span> -</span><span id="qualify_tables-14"><a href="#qualify_tables-14"><span class="linenos">14</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="qualify_tables-15"><a href="#qualify_tables-15"><span class="linenos">15</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT 1 FROM tbl")</span> -</span><span id="qualify_tables-16"><a href="#qualify_tables-16"><span class="linenos">16</span></a><span class="sd"> >>> qualify_tables(expression, db="db").sql()</span> -</span><span id="qualify_tables-17"><a href="#qualify_tables-17"><span class="linenos">17</span></a><span class="sd"> 'SELECT 1 FROM db.tbl AS tbl'</span> -</span><span id="qualify_tables-18"><a href="#qualify_tables-18"><span class="linenos">18</span></a> -</span><span id="qualify_tables-19"><a href="#qualify_tables-19"><span class="linenos">19</span></a><span class="sd"> Args:</span> -</span><span id="qualify_tables-20"><a href="#qualify_tables-20"><span class="linenos">20</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> -</span><span id="qualify_tables-21"><a href="#qualify_tables-21"><span class="linenos">21</span></a><span class="sd"> db (str): Database name</span> -</span><span id="qualify_tables-22"><a href="#qualify_tables-22"><span class="linenos">22</span></a><span class="sd"> catalog (str): Catalog name</span> -</span><span id="qualify_tables-23"><a href="#qualify_tables-23"><span class="linenos">23</span></a><span class="sd"> schema: A schema to populate</span> -</span><span id="qualify_tables-24"><a href="#qualify_tables-24"><span class="linenos">24</span></a><span class="sd"> Returns:</span> -</span><span id="qualify_tables-25"><a href="#qualify_tables-25"><span class="linenos">25</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> -</span><span id="qualify_tables-26"><a href="#qualify_tables-26"><span class="linenos">26</span></a><span class="sd"> """</span> -</span><span id="qualify_tables-27"><a href="#qualify_tables-27"><span class="linenos">27</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span> -</span><span id="qualify_tables-28"><a href="#qualify_tables-28"><span class="linenos">28</span></a> -</span><span id="qualify_tables-29"><a href="#qualify_tables-29"><span class="linenos">29</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> -</span><span id="qualify_tables-30"><a href="#qualify_tables-30"><span class="linenos">30</span></a> -</span><span id="qualify_tables-31"><a href="#qualify_tables-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="qualify_tables-32"><a href="#qualify_tables-32"><span class="linenos">32</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">):</span> -</span><span id="qualify_tables-33"><a href="#qualify_tables-33"><span class="linenos">33</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">):</span> -</span><span id="qualify_tables-34"><a href="#qualify_tables-34"><span class="linenos">34</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> -</span><span id="qualify_tables-35"><a href="#qualify_tables-35"><span class="linenos">35</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span> -</span><span id="qualify_tables-36"><a href="#qualify_tables-36"><span class="linenos">36</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> -</span><span id="qualify_tables-37"><a href="#qualify_tables-37"><span class="linenos">37</span></a> -</span><span id="qualify_tables-38"><a href="#qualify_tables-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="qualify_tables-39"><a href="#qualify_tables-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="qualify_tables-40"><a href="#qualify_tables-40"><span class="linenos">40</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span> -</span><span id="qualify_tables-41"><a href="#qualify_tables-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"db"</span><span class="p">):</span> -</span><span id="qualify_tables-42"><a href="#qualify_tables-42"><span class="linenos">42</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span> -</span><span id="qualify_tables-43"><a href="#qualify_tables-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">):</span> -</span><span id="qualify_tables-44"><a href="#qualify_tables-44"><span class="linenos">44</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span> -</span><span id="qualify_tables-45"><a href="#qualify_tables-45"><span class="linenos">45</span></a> -</span><span id="qualify_tables-46"><a href="#qualify_tables-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> -</span><span id="qualify_tables-47"><a href="#qualify_tables-47"><span class="linenos">47</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> -</span><span id="qualify_tables-48"><a href="#qualify_tables-48"><span class="linenos">48</span></a> <span class="n">alias</span><span class="p">(</span> -</span><span id="qualify_tables-49"><a href="#qualify_tables-49"><span class="linenos">49</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> -</span><span id="qualify_tables-50"><a href="#qualify_tables-50"><span class="linenos">50</span></a> <span class="n">name</span> <span class="k">if</span> <span class="n">name</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span> -</span><span id="qualify_tables-51"><a href="#qualify_tables-51"><span class="linenos">51</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> -</span><span id="qualify_tables-52"><a href="#qualify_tables-52"><span class="linenos">52</span></a> <span class="p">)</span> -</span><span id="qualify_tables-53"><a href="#qualify_tables-53"><span class="linenos">53</span></a> <span class="p">)</span> -</span><span id="qualify_tables-54"><a href="#qualify_tables-54"><span class="linenos">54</span></a> -</span><span id="qualify_tables-55"><a href="#qualify_tables-55"><span class="linenos">55</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> -</span><span id="qualify_tables-56"><a href="#qualify_tables-56"><span class="linenos">56</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span> -</span><span id="qualify_tables-57"><a href="#qualify_tables-57"><span class="linenos">57</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> -</span><span id="qualify_tables-58"><a href="#qualify_tables-58"><span class="linenos">58</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> -</span><span id="qualify_tables-59"><a href="#qualify_tables-59"><span class="linenos">59</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span> -</span><span id="qualify_tables-60"><a href="#qualify_tables-60"><span class="linenos">60</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span> -</span><span id="qualify_tables-61"><a href="#qualify_tables-61"><span class="linenos">61</span></a> <span class="p">)</span> -</span><span id="qualify_tables-62"><a href="#qualify_tables-62"><span class="linenos">62</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span> -</span><span id="qualify_tables-63"><a href="#qualify_tables-63"><span class="linenos">63</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> -</span><span id="qualify_tables-64"><a href="#qualify_tables-64"><span class="linenos">64</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span> -</span><span id="qualify_tables-65"><a href="#qualify_tables-65"><span class="linenos">65</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="qualify_tables-66"><a href="#qualify_tables-66"><span class="linenos">66</span></a> -</span><span id="qualify_tables-67"><a href="#qualify_tables-67"><span class="linenos">67</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> -</span><span id="qualify_tables-68"><a href="#qualify_tables-68"><span class="linenos">68</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span> -</span><span id="qualify_tables-69"><a href="#qualify_tables-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">udtf</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="qualify_tables-70"><a href="#qualify_tables-70"><span class="linenos">70</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">udtf</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span><span class="p">):</span> -</span><span id="qualify_tables-71"><a href="#qualify_tables-71"><span class="linenos">71</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">))</span> -</span><span id="qualify_tables-72"><a href="#qualify_tables-72"><span class="linenos">72</span></a> -</span><span id="qualify_tables-73"><a href="#qualify_tables-73"><span class="linenos">73</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="qualify_tables-11"><a href="#qualify_tables-11"><span class="linenos">11</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables. Additionally, this</span> +</span><span id="qualify_tables-12"><a href="#qualify_tables-12"><span class="linenos">12</span></a><span class="sd"> replaces "join constructs" (*) by equivalent SELECT * subqueries.</span> +</span><span id="qualify_tables-13"><a href="#qualify_tables-13"><span class="linenos">13</span></a> +</span><span id="qualify_tables-14"><a href="#qualify_tables-14"><span class="linenos">14</span></a><span class="sd"> Examples:</span> +</span><span id="qualify_tables-15"><a href="#qualify_tables-15"><span class="linenos">15</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="qualify_tables-16"><a href="#qualify_tables-16"><span class="linenos">16</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT 1 FROM tbl")</span> +</span><span id="qualify_tables-17"><a href="#qualify_tables-17"><span class="linenos">17</span></a><span class="sd"> >>> qualify_tables(expression, db="db").sql()</span> +</span><span id="qualify_tables-18"><a href="#qualify_tables-18"><span class="linenos">18</span></a><span class="sd"> 'SELECT 1 FROM db.tbl AS tbl'</span> +</span><span id="qualify_tables-19"><a href="#qualify_tables-19"><span class="linenos">19</span></a><span class="sd"> >>></span> +</span><span id="qualify_tables-20"><a href="#qualify_tables-20"><span class="linenos">20</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT * FROM (tbl1 JOIN tbl2 ON id1 = id2)")</span> +</span><span id="qualify_tables-21"><a href="#qualify_tables-21"><span class="linenos">21</span></a><span class="sd"> >>> qualify_tables(expression).sql()</span> +</span><span id="qualify_tables-22"><a href="#qualify_tables-22"><span class="linenos">22</span></a><span class="sd"> 'SELECT * FROM (SELECT * FROM tbl1 AS tbl1 JOIN tbl2 AS tbl2 ON id1 = id2) AS _q_0'</span> +</span><span id="qualify_tables-23"><a href="#qualify_tables-23"><span class="linenos">23</span></a> +</span><span id="qualify_tables-24"><a href="#qualify_tables-24"><span class="linenos">24</span></a><span class="sd"> Args:</span> +</span><span id="qualify_tables-25"><a href="#qualify_tables-25"><span class="linenos">25</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span> +</span><span id="qualify_tables-26"><a href="#qualify_tables-26"><span class="linenos">26</span></a><span class="sd"> db (str): Database name</span> +</span><span id="qualify_tables-27"><a href="#qualify_tables-27"><span class="linenos">27</span></a><span class="sd"> catalog (str): Catalog name</span> +</span><span id="qualify_tables-28"><a href="#qualify_tables-28"><span class="linenos">28</span></a><span class="sd"> schema: A schema to populate</span> +</span><span id="qualify_tables-29"><a href="#qualify_tables-29"><span class="linenos">29</span></a> +</span><span id="qualify_tables-30"><a href="#qualify_tables-30"><span class="linenos">30</span></a><span class="sd"> Returns:</span> +</span><span id="qualify_tables-31"><a href="#qualify_tables-31"><span class="linenos">31</span></a><span class="sd"> sqlglot.Expression: qualified expression</span> +</span><span id="qualify_tables-32"><a href="#qualify_tables-32"><span class="linenos">32</span></a> +</span><span id="qualify_tables-33"><a href="#qualify_tables-33"><span class="linenos">33</span></a><span class="sd"> (*) See section 7.2.1.2 in https://www.postgresql.org/docs/current/queries-table-expressions.html</span> +</span><span id="qualify_tables-34"><a href="#qualify_tables-34"><span class="linenos">34</span></a><span class="sd"> """</span> +</span><span id="qualify_tables-35"><a href="#qualify_tables-35"><span class="linenos">35</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span> +</span><span id="qualify_tables-36"><a href="#qualify_tables-36"><span class="linenos">36</span></a> +</span><span id="qualify_tables-37"><a href="#qualify_tables-37"><span class="linenos">37</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">"_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span> +</span><span id="qualify_tables-38"><a href="#qualify_tables-38"><span class="linenos">38</span></a> +</span><span id="qualify_tables-39"><a href="#qualify_tables-39"><span class="linenos">39</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="qualify_tables-40"><a href="#qualify_tables-40"><span class="linenos">40</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">):</span> +</span><span id="qualify_tables-41"><a href="#qualify_tables-41"><span class="linenos">41</span></a> <span class="c1"># Expand join construct</span> +</span><span id="qualify_tables-42"><a href="#qualify_tables-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">derived_table</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="qualify_tables-43"><a href="#qualify_tables-43"><span class="linenos">43</span></a> <span class="n">unnested</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="qualify_tables-44"><a href="#qualify_tables-44"><span class="linenos">44</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">unnested</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="qualify_tables-45"><a href="#qualify_tables-45"><span class="linenos">45</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="s2">"*"</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">unnested</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="qualify_tables-46"><a href="#qualify_tables-46"><span class="linenos">46</span></a> +</span><span id="qualify_tables-47"><a href="#qualify_tables-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">):</span> +</span><span id="qualify_tables-48"><a href="#qualify_tables-48"><span class="linenos">48</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="n">next_name</span><span class="p">()</span> +</span><span id="qualify_tables-49"><a href="#qualify_tables-49"><span class="linenos">49</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span> +</span><span id="qualify_tables-50"><a href="#qualify_tables-50"><span class="linenos">50</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span> +</span><span id="qualify_tables-51"><a href="#qualify_tables-51"><span class="linenos">51</span></a> +</span><span id="qualify_tables-52"><a href="#qualify_tables-52"><span class="linenos">52</span></a> <span class="n">pivots</span> <span class="o">=</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> +</span><span id="qualify_tables-53"><a href="#qualify_tables-53"><span class="linenos">53</span></a> <span class="k">if</span> <span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="qualify_tables-54"><a href="#qualify_tables-54"><span class="linenos">54</span></a> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">next_name</span><span class="p">())))</span> +</span><span id="qualify_tables-55"><a href="#qualify_tables-55"><span class="linenos">55</span></a> +</span><span id="qualify_tables-56"><a href="#qualify_tables-56"><span class="linenos">56</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="qualify_tables-57"><a href="#qualify_tables-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="qualify_tables-58"><a href="#qualify_tables-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">):</span> +</span><span id="qualify_tables-59"><a href="#qualify_tables-59"><span class="linenos">59</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"db"</span><span class="p">):</span> +</span><span id="qualify_tables-60"><a href="#qualify_tables-60"><span class="linenos">60</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"db"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span> +</span><span id="qualify_tables-61"><a href="#qualify_tables-61"><span class="linenos">61</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">):</span> +</span><span id="qualify_tables-62"><a href="#qualify_tables-62"><span class="linenos">62</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"catalog"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span> +</span><span id="qualify_tables-63"><a href="#qualify_tables-63"><span class="linenos">63</span></a> +</span><span id="qualify_tables-64"><a href="#qualify_tables-64"><span class="linenos">64</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="qualify_tables-65"><a href="#qualify_tables-65"><span class="linenos">65</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span> +</span><span id="qualify_tables-66"><a href="#qualify_tables-66"><span class="linenos">66</span></a> <span class="n">alias</span><span class="p">(</span> +</span><span id="qualify_tables-67"><a href="#qualify_tables-67"><span class="linenos">67</span></a> <span class="n">source</span><span class="p">,</span> +</span><span id="qualify_tables-68"><a href="#qualify_tables-68"><span class="linenos">68</span></a> <span class="n">name</span> <span class="ow">or</span> <span class="n">source</span><span class="o">.</span><span class="n">name</span> <span class="ow">or</span> <span class="n">next_name</span><span class="p">(),</span> +</span><span id="qualify_tables-69"><a href="#qualify_tables-69"><span class="linenos">69</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="qualify_tables-70"><a href="#qualify_tables-70"><span class="linenos">70</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> +</span><span id="qualify_tables-71"><a href="#qualify_tables-71"><span class="linenos">71</span></a> <span class="p">)</span> +</span><span id="qualify_tables-72"><a href="#qualify_tables-72"><span class="linenos">72</span></a> <span class="p">)</span> +</span><span id="qualify_tables-73"><a href="#qualify_tables-73"><span class="linenos">73</span></a> +</span><span id="qualify_tables-74"><a href="#qualify_tables-74"><span class="linenos">74</span></a> <span class="n">pivots</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> +</span><span id="qualify_tables-75"><a href="#qualify_tables-75"><span class="linenos">75</span></a> <span class="k">if</span> <span class="n">pivots</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="qualify_tables-76"><a href="#qualify_tables-76"><span class="linenos">76</span></a> <span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">next_name</span><span class="p">())))</span> +</span><span id="qualify_tables-77"><a href="#qualify_tables-77"><span class="linenos">77</span></a> +</span><span id="qualify_tables-78"><a href="#qualify_tables-78"><span class="linenos">78</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span> +</span><span id="qualify_tables-79"><a href="#qualify_tables-79"><span class="linenos">79</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span> +</span><span id="qualify_tables-80"><a href="#qualify_tables-80"><span class="linenos">80</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> +</span><span id="qualify_tables-81"><a href="#qualify_tables-81"><span class="linenos">81</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span> +</span><span id="qualify_tables-82"><a href="#qualify_tables-82"><span class="linenos">82</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span> +</span><span id="qualify_tables-83"><a href="#qualify_tables-83"><span class="linenos">83</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span> +</span><span id="qualify_tables-84"><a href="#qualify_tables-84"><span class="linenos">84</span></a> <span class="p">)</span> +</span><span id="qualify_tables-85"><a href="#qualify_tables-85"><span class="linenos">85</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span> +</span><span id="qualify_tables-86"><a href="#qualify_tables-86"><span class="linenos">86</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span> +</span><span id="qualify_tables-87"><a href="#qualify_tables-87"><span class="linenos">87</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span> +</span><span id="qualify_tables-88"><a href="#qualify_tables-88"><span class="linenos">88</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="qualify_tables-89"><a href="#qualify_tables-89"><span class="linenos">89</span></a> +</span><span id="qualify_tables-90"><a href="#qualify_tables-90"><span class="linenos">90</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> +</span><span id="qualify_tables-91"><a href="#qualify_tables-91"><span class="linenos">91</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span> +</span><span id="qualify_tables-92"><a href="#qualify_tables-92"><span class="linenos">92</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">udtf</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Values</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="qualify_tables-93"><a href="#qualify_tables-93"><span class="linenos">93</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">udtf</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">expressions</span><span class="p">):</span> +</span><span id="qualify_tables-94"><a href="#qualify_tables-94"><span class="linenos">94</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"columns"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="sa">f</span><span class="s2">"_col_</span><span class="si">{</span><span class="n">i</span><span class="si">}</span><span class="s2">"</span><span class="p">))</span> +</span><span id="qualify_tables-95"><a href="#qualify_tables-95"><span class="linenos">95</span></a> +</span><span id="qualify_tables-96"><a href="#qualify_tables-96"><span class="linenos">96</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> - <div class="docstring"><p>Rewrite sqlglot AST to have fully qualified tables.</p> + <div class="docstring"><p>Rewrite sqlglot AST to have fully qualified tables. Additionally, this +replaces "join constructs" (*) by equivalent SELECT * subqueries.</p> -<h6 id="example">Example:</h6> +<h6 id="examples">Examples:</h6> <blockquote> <div class="pdoc-code codehilite"> @@ -221,6 +268,10 @@ <span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT 1 FROM tbl"</span><span class="p">)</span> <span class="gp">>>> </span><span class="n">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="s2">"db"</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span> <span class="go">'SELECT 1 FROM db.tbl AS tbl'</span> +<span class="gp">>>></span> +<span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT * FROM (tbl1 JOIN tbl2 ON id1 = id2)"</span><span class="p">)</span> +<span class="gp">>>> </span><span class="n">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span> +<span class="go">'SELECT * FROM (SELECT * FROM tbl1 AS tbl1 JOIN tbl2 AS tbl2 ON id1 = id2) AS _q_0'</span> </code></pre> </div> </blockquote> @@ -239,6 +290,8 @@ <blockquote> <p>sqlglot.Expression: qualified expression</p> </blockquote> + +<p>(*) See section 7.2.1.2 in <a href="https://www.postgresql.org/docs/current/queries-table-expressions.html">https://www.postgresql.org/docs/current/queries-table-expressions.html</a></p> </div> diff --git a/docs/sqlglot/optimizer/scope.html b/docs/sqlglot/optimizer/scope.html index fad49fc..15605b3 100644 --- a/docs/sqlglot/optimizer/scope.html +++ b/docs/sqlglot/optimizer/scope.html @@ -189,683 +189,714 @@ <label class="view-source-button" for="mod-scope-view-source"><span>View Source</span></label> <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">import</span> <span class="nn">itertools</span> -</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a><span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span> -</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">from</span> <span class="nn">enum</span> <span class="kn">import</span> <span class="n">Enum</span><span class="p">,</span> <span class="n">auto</span> -</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a> -</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> -</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> -</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">find_new_name</span> -</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a> +</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span> +</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span> +</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span> <span class="nn">enum</span> <span class="kn">import</span> <span class="n">Enum</span><span class="p">,</span> <span class="n">auto</span> +</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot.errors</span> <span class="kn">import</span> <span class="n">OptimizeError</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">find_new_name</span> </span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a> -</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="k">class</span> <span class="nc">ScopeType</span><span class="p">(</span><span class="n">Enum</span><span class="p">):</span> -</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> <span class="n">ROOT</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="n">SUBQUERY</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> <span class="n">DERIVED_TABLE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> <span class="n">CTE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> <span class="n">UNION</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="n">UDTF</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> +</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a> +</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="k">class</span> <span class="nc">ScopeType</span><span class="p">(</span><span class="n">Enum</span><span class="p">):</span> +</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="n">ROOT</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> <span class="n">SUBQUERY</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> <span class="n">DERIVED_TABLE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> <span class="n">CTE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a> <span class="n">UNION</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> <span class="n">UDTF</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> </span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a> -</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="k">class</span> <span class="nc">Scope</span><span class="p">:</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> Selection scope.</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a> -</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> Attributes:</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> expression (exp.Select|exp.Union): Root expression of this scope</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> sources (dict[str, exp.Table|Scope]): Mapping of source name to either</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> a Table expression or another Scope instance. For example:</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> SELECT * FROM x {"x": Table(this="x")}</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> SELECT * FROM x AS y {"y": Table(this="x")}</span> -</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y {"y": Scope(...)}</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> lateral_sources (dict[str, exp.Table|Scope]): Sources from laterals</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> For example:</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> SELECT c FROM x LATERAL VIEW EXPLODE (a) AS c;</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> The LATERAL VIEW EXPLODE gets x as a source.</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> outer_column_list (list[str]): If this is a derived table or CTE, and the outer query</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a><span class="sd"> defines a column list of it's alias of this scope, this is that list of columns.</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a><span class="sd"> For example:</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y(col1, col2)</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a><span class="sd"> The inner query would have `["col1", "col2"]` for its `outer_column_list`</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a><span class="sd"> parent (Scope): Parent scope</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="sd"> scope_type (ScopeType): Type of this scope, relative to it's parent</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a><span class="sd"> subquery_scopes (list[Scope]): List of all child scopes for subqueries</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a><span class="sd"> cte_scopes (list[Scope]): List of all child scopes for CTEs</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a><span class="sd"> derived_table_scopes (list[Scope]): List of all child scopes for derived_tables</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a><span class="sd"> udtf_scopes (list[Scope]): List of all child scopes for user defined tabular functions</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a><span class="sd"> table_scopes (list[Scope]): derived_table_scopes + udtf_scopes, in the order that they're defined</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a><span class="sd"> union_scopes (list[Scope, Scope]): If this Scope is for a Union expression, this will be</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a><span class="sd"> a list of the left and right child scopes.</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="sd"> """</span> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="bp">self</span><span class="p">,</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">expression</span><span class="p">,</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="p">):</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="p">)</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">def</span> <span class="nf">_collect</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">continue</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">):</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)):</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="k">class</span> <span class="nc">Scope</span><span class="p">:</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> Selection scope.</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> Attributes:</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> expression (exp.Select|exp.Union): Root expression of this scope</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> sources (dict[str, exp.Table|Scope]): Mapping of source name to either</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> a Table expression or another Scope instance. For example:</span> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> SELECT * FROM x {"x": Table(this="x")}</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> SELECT * FROM x AS y {"y": Table(this="x")}</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y {"y": Scope(...)}</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> lateral_sources (dict[str, exp.Table|Scope]): Sources from laterals</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> For example:</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> SELECT c FROM x LATERAL VIEW EXPLODE (a) AS c;</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> The LATERAL VIEW EXPLODE gets x as a source.</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a><span class="sd"> outer_column_list (list[str]): If this is a derived table or CTE, and the outer query</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a><span class="sd"> defines a column list of it's alias of this scope, this is that list of columns.</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a><span class="sd"> For example:</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y(col1, col2)</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a><span class="sd"> The inner query would have `["col1", "col2"]` for its `outer_column_list`</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="sd"> parent (Scope): Parent scope</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a><span class="sd"> scope_type (ScopeType): Type of this scope, relative to it's parent</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a><span class="sd"> subquery_scopes (list[Scope]): List of all child scopes for subqueries</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a><span class="sd"> cte_scopes (list[Scope]): List of all child scopes for CTEs</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a><span class="sd"> derived_table_scopes (list[Scope]): List of all child scopes for derived_tables</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a><span class="sd"> udtf_scopes (list[Scope]): List of all child scopes for user defined tabular functions</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a><span class="sd"> table_scopes (list[Scope]): derived_table_scopes + udtf_scopes, in the order that they're defined</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a><span class="sd"> union_scopes (list[Scope, Scope]): If this Scope is for a Union expression, this will be</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="sd"> a list of the left and right child scopes.</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a><span class="sd"> """</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="n">expression</span><span class="p">,</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="p">):</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="p">)</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">def</span> <span class="nf">_collect</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">continue</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">):</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)):</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> </span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">def</span> <span class="nf">_ensure_collected</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span><span class="p">:</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collect</span><span class="p">()</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">def</span> <span class="nf">_ensure_collected</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span><span class="p">:</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collect</span><span class="p">()</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> </span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> Args:</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> Returns:</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="sd"> the criteria was found.</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a><span class="sd"> """</span> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a><span class="sd"> match at least one of the specified expression types.</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> Args:</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="sd"> Returns:</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a><span class="sd"> the criteria was found.</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a><span class="sd"> """</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a><span class="sd"> match at least one of the specified expression types.</span> </span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a><span class="sd"> Args:</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a><span class="sd"> Yields:</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a><span class="sd"> exp.Expression: nodes</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a><span class="sd"> """</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">yield</span> <span class="n">expression</span> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a><span class="sd"> Replace `old` with `new`.</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a><span class="sd"> Args:</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a><span class="sd"> Yields:</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a><span class="sd"> exp.Expression: nodes</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a><span class="sd"> """</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">yield</span> <span class="n">expression</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="sd"> Replace `old` with `new`.</span> </span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a><span class="sd"> Args:</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a><span class="sd"> old (exp.Expression): old node</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a><span class="sd"> new (exp.Expression): new node</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a><span class="sd"> """</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="nd">@property</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="k">def</span> <span class="nf">tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a><span class="sd"> List of tables in this scope.</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a><span class="sd"> Returns:</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a><span class="sd"> list[exp.Table]: tables</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a><span class="sd"> """</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="nd">@property</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">def</span> <span class="nf">ctes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a><span class="sd"> List of CTEs in this scope.</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> Returns:</span> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a><span class="sd"> list[exp.CTE]: ctes</span> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a><span class="sd"> """</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="nd">@property</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="k">def</span> <span class="nf">derived_tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a><span class="sd"> List of derived tables in this scope.</span> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a><span class="sd"> For example:</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a><span class="sd"> SELECT * FROM (SELECT ...) <- that's a derived table</span> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a><span class="sd"> Returns:</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a><span class="sd"> list[exp.Subquery]: derived tables</span> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a><span class="sd"> """</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="nd">@property</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">def</span> <span class="nf">udtfs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a><span class="sd"> List of "User Defined Tabular Functions" in this scope.</span> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a><span class="sd"> Returns:</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a><span class="sd"> list[exp.UDTF]: UDTFs</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="sd"> """</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="nd">@property</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">def</span> <span class="nf">subqueries</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> List of subqueries in this scope.</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a><span class="sd"> For example:</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a><span class="sd"> SELECT * FROM x WHERE a IN (SELECT ...) <- that's a subquery</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a><span class="sd"> Returns:</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a><span class="sd"> list[exp.Subqueryable]: subqueries</span> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a><span class="sd"> """</span> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="nd">@property</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="k">def</span> <span class="nf">columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a><span class="sd"> List of columns in this scope.</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="sd"> Returns:</span> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a><span class="sd"> list[exp.Column]: Column instances in this scope, plus any</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a><span class="sd"> Columns that reference this scope from correlated subqueries.</span> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> """</span> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">external_columns</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">column</span> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span><span class="p">)</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="p">]</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">named_selects</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a><span class="sd"> Args:</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a><span class="sd"> old (exp.Expression): old node</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a><span class="sd"> new (exp.Expression): new node</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a><span class="sd"> """</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="nd">@property</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">def</span> <span class="nf">tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a><span class="sd"> List of tables in this scope.</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a><span class="sd"> Returns:</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a><span class="sd"> list[exp.Table]: tables</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a><span class="sd"> """</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="nd">@property</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">def</span> <span class="nf">ctes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> List of CTEs in this scope.</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a><span class="sd"> Returns:</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a><span class="sd"> list[exp.CTE]: ctes</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a><span class="sd"> """</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="nd">@property</span> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="k">def</span> <span class="nf">derived_tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a><span class="sd"> List of derived tables in this scope.</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a><span class="sd"> For example:</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a><span class="sd"> SELECT * FROM (SELECT ...) <- that's a derived table</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a><span class="sd"> Returns:</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a><span class="sd"> list[exp.Subquery]: derived tables</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a><span class="sd"> """</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="nd">@property</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">def</span> <span class="nf">udtfs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a><span class="sd"> List of "User Defined Tabular Functions" in this scope.</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="sd"> Returns:</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="sd"> list[exp.UDTF]: UDTFs</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a><span class="sd"> """</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="nd">@property</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">def</span> <span class="nf">subqueries</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a><span class="sd"> List of subqueries in this scope.</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a><span class="sd"> For example:</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a><span class="sd"> SELECT * FROM x WHERE a IN (SELECT ...) <- that's a subquery</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a><span class="sd"> Returns:</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a><span class="sd"> list[exp.Subqueryable]: subqueries</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a><span class="sd"> """</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="nd">@property</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">def</span> <span class="nf">columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="sd"> List of columns in this scope.</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a><span class="sd"> Returns:</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> list[exp.Column]: Column instances in this scope, plus any</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> Columns that reference this scope from correlated subqueries.</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="sd"> """</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">external_columns</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">column</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span><span class="p">)</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="p">]</span> </span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> <span class="o">+</span> <span class="n">external_columns</span><span class="p">:</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">ancestor</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">)</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="ow">not</span> <span class="n">ancestor</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="c1"># Window functions can have an ORDER BY clause</span> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="ow">or</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">named_selects</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">))</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="p">):</span> -</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="nd">@property</span> -</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> <span class="k">def</span> <span class="nf">selected_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="sd"> Mapping of nodes and sources that are actually selected from in this scope.</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a><span class="sd"> That is, all tables in a schema are selectable at any point. But a</span> -</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="sd"> table only becomes a selected source if it's included in a FROM or JOIN clause.</span> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> Returns:</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> dict[str, (exp.Table|exp.Select, exp.Table|Scope)]: selected sources and nodes</span> -</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> """</span> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">referenced_names</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span><span class="p">:</span> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="p">))</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtfs</span><span class="p">):</span> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()))</span> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="n">result</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">referenced_names</span><span class="p">:</span> -</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">result</span><span class="p">:</span> -</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Alias already used: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="n">result</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> -</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="n">result</span> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="nd">@property</span> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="k">def</span> <span class="nf">cte_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a><span class="sd"> Sources that are CTEs.</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a><span class="sd"> Returns:</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="sd"> dict[str, Scope]: Mapping of source alias to Scope</span> -</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a><span class="sd"> """</span> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">return</span> <span class="p">{</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="n">alias</span><span class="p">:</span> <span class="n">scope</span> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="k">for</span> <span class="n">alias</span><span class="p">,</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="p">}</span> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="nd">@property</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="k">def</span> <span class="nf">selects</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a><span class="sd"> Select expressions of this scope.</span> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a><span class="sd"> For example, for the following expression:</span> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a><span class="sd"> SELECT 1 as a, 2 as b FROM x</span> -</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a><span class="sd"> The outputs are the "1 as a" and "2 as b" expressions.</span> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> -</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a><span class="sd"> Returns:</span> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a><span class="sd"> list[exp.Expression]: expressions</span> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a><span class="sd"> """</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span><span class="o">.</span><span class="n">selects</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span> -</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="nd">@property</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="k">def</span> <span class="nf">external_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a><span class="sd"> Columns that appear to reference sources in outer scopes.</span> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a><span class="sd"> Returns:</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a><span class="sd"> list[exp.Column]: Column instances that don't reference</span> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a><span class="sd"> sources in the current scope.</span> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="sd"> """</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected_sources</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="p">]</span> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="nd">@property</span> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="k">def</span> <span class="nf">unqualified_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a><span class="sd"> Unqualified columns in the current scope.</span> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a><span class="sd"> Returns:</span> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a><span class="sd"> list[exp.Column]: Unqualified columns</span> -</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a><span class="sd"> """</span> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="nd">@property</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">def</span> <span class="nf">join_hints</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a><span class="sd"> Hints that exist in the scope that reference tables</span> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a><span class="sd"> Returns:</span> -</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a><span class="sd"> list[exp.JoinHint]: Join hints that are referenced within the scope</span> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a><span class="sd"> """</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="k">return</span> <span class="p">[]</span> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">named_selects</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> <span class="o">+</span> <span class="n">external_columns</span><span class="p">:</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">ancestor</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="p">)</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="ow">not</span> <span class="n">ancestor</span> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="ow">or</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">))</span> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">named_selects</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">))</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="p">):</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a> <span class="nd">@property</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> <span class="k">def</span> <span class="nf">selected_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> Mapping of nodes and sources that are actually selected from in this scope.</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> That is, all tables in a schema are selectable at any point. But a</span> +</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> table only becomes a selected source if it's included in a FROM or JOIN clause.</span> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a><span class="sd"> Returns:</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a><span class="sd"> dict[str, (exp.Table|exp.Select, exp.Table|Scope)]: selected sources and nodes</span> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a><span class="sd"> """</span> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="n">referenced_names</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span><span class="p">:</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="p">))</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtfs</span><span class="p">):</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()))</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="n">result</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">referenced_names</span><span class="p">:</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">result</span><span class="p">:</span> +</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Alias already used: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="n">result</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="n">result</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="nd">@property</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="k">def</span> <span class="nf">cte_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a><span class="sd"> Sources that are CTEs.</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a><span class="sd"> Returns:</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a><span class="sd"> dict[str, Scope]: Mapping of source alias to Scope</span> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a><span class="sd"> """</span> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">return</span> <span class="p">{</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="n">alias</span><span class="p">:</span> <span class="n">scope</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">for</span> <span class="n">alias</span><span class="p">,</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="p">}</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="nd">@property</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="k">def</span> <span class="nf">selects</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a><span class="sd"> Select expressions of this scope.</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a><span class="sd"> For example, for the following expression:</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a><span class="sd"> SELECT 1 as a, 2 as b FROM x</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a><span class="sd"> The outputs are the "1 as a" and "2 as b" expressions.</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a><span class="sd"> Returns:</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a><span class="sd"> list[exp.Expression]: expressions</span> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a><span class="sd"> """</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span><span class="o">.</span><span class="n">selects</span> +</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="nd">@property</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">def</span> <span class="nf">external_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a><span class="sd"> Columns that appear to reference sources in outer scopes.</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a><span class="sd"> Returns:</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a><span class="sd"> list[exp.Column]: Column instances that don't reference</span> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a><span class="sd"> sources in the current scope.</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a><span class="sd"> """</span> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected_sources</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="p">]</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="nd">@property</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="k">def</span> <span class="nf">unqualified_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a><span class="sd"> Unqualified columns in the current scope.</span> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a><span class="sd"> Returns:</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a><span class="sd"> list[exp.Column]: Unqualified columns</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a><span class="sd"> """</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="nd">@property</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">def</span> <span class="nf">join_hints</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a><span class="sd"> Hints that exist in the scope that reference tables</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> +</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a><span class="sd"> Returns:</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a><span class="sd"> list[exp.JoinHint]: Join hints that are referenced within the scope</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="sd"> """</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> </span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> Args:</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="sd"> source_name (str): Name of the source</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a><span class="sd"> Returns:</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a><span class="sd"> """</span> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> -</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="nd">@property</span> -</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">def</span> <span class="nf">is_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a subquery"""</span> -</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span> -</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> -</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="nd">@property</span> -</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="k">def</span> <span class="nf">is_derived_table</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a derived table"""</span> -</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> -</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> -</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="nd">@property</span> -</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="k">def</span> <span class="nf">is_union</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a union"""</span> -</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="nd">@property</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="k">def</span> <span class="nf">pivots</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span><span class="p">:</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="n">pivot</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="k">for</span> <span class="n">pivot</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="p">]</span> +</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> +</span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> +</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> +</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> +</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a><span class="sd"> Args:</span> +</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a><span class="sd"> source_name (str): Name of the source</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a><span class="sd"> Returns:</span> +</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> +</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a><span class="sd"> """</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> </span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> </span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="nd">@property</span> -</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">def</span> <span class="nf">is_cte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a common table expression"""</span> -</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">def</span> <span class="nf">is_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a subquery"""</span> +</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span> </span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> </span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> <span class="nd">@property</span> -</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="k">def</span> <span class="nf">is_root</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="w"> </span><span class="sd">"""Determine if this is the root scope"""</span> -</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="k">def</span> <span class="nf">is_derived_table</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a derived table"""</span> +</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> </span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> </span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> <span class="nd">@property</span> -</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="k">def</span> <span class="nf">is_udtf</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a UDTF (User Defined Table Function)"""</span> -</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> +</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="k">def</span> <span class="nf">is_union</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a union"""</span> +</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span> </span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> </span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> <span class="nd">@property</span> -</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> <span class="k">def</span> <span class="nf">is_correlated_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a correlated subquery"""</span> -</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">is_subquery</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">external_columns</span><span class="p">)</span> +</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> <span class="k">def</span> <span class="nf">is_cte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a common table expression"""</span> +</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span> </span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> -</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> -</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> -</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> +</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> <span class="nd">@property</span> +</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a> <span class="k">def</span> <span class="nf">is_root</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a><span class="w"> </span><span class="sd">"""Determine if this is the root scope"""</span> +</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span> </span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> -</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> -</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> -</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> -</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> <span class="nd">@property</span> +</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="k">def</span> <span class="nf">is_udtf</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a UDTF (User Defined Table Function)"""</span> +</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> </span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> -</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> -</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> -</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="nd">@property</span> +</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> <span class="k">def</span> <span class="nf">is_correlated_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a correlated subquery"""</span> +</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> <span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">is_subquery</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">external_columns</span><span class="p">)</span> </span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> -</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> <span class="k">return</span> <span class="sa">f</span><span class="s2">"Scope<</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span><span class="si">}</span><span class="s2">>"</span> -</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> -</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a><span class="sd"> Traverse the scope tree from this node.</span> -</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> -</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a><span class="sd"> Yields:</span> -</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> -</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a><span class="sd"> """</span> -</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> -</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> -</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="p">):</span> -</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> -</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> <span class="k">yield</span> <span class="bp">self</span> -</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> -</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> -</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> -</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a><span class="sd"> Returns:</span> -</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> -</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a><span class="sd"> """</span> -</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> -</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> -</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> -</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> -</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> +</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> +</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> +</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> +</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a> +</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> +</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> +</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> +</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> +</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> +</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> +</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> +</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="k">return</span> <span class="sa">f</span><span class="s2">"Scope<</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span><span class="si">}</span><span class="s2">>"</span> +</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> +</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a><span class="sd"> Traverse the scope tree from this node.</span> +</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> +</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a><span class="sd"> Yields:</span> +</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> +</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a><span class="sd"> """</span> +</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> +</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> +</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="p">):</span> +</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> +</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">yield</span> <span class="bp">self</span> </span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> -</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> -</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a><span class="k">def</span> <span class="nf">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a><span class="sd"> Traverse an expression by it's "scopes".</span> -</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> -</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a><span class="sd"> "Scope" represents the current context of a Select statement.</span> -</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> -</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a><span class="sd"> This is helpful for optimizing queries, where we need more information than</span> -</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a><span class="sd"> the expression tree itself. For example, we might care about the source</span> -</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a><span class="sd"> names within a subquery. Returns a list because a generator could result in</span> -</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a><span class="sd"> incomplete properties which is confusing.</span> -</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> -</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a><span class="sd"> Examples:</span> -</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT a FROM x) AS y")</span> -</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a><span class="sd"> >>> scopes = traverse_scope(expression)</span> -</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a><span class="sd"> >>> scopes[0].expression.sql(), list(scopes[0].sources)</span> -</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a><span class="sd"> ('SELECT a FROM x', ['x'])</span> -</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a><span class="sd"> >>> scopes[1].expression.sql(), list(scopes[1].sources)</span> -</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a><span class="sd"> ('SELECT a FROM (SELECT a FROM x) AS y', ['y'])</span> -</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> -</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a><span class="sd"> Args:</span> -</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a><span class="sd"> expression (exp.Expression): expression to traverse</span> -</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a><span class="sd"> Returns:</span> -</span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a><span class="sd"> list[Scope]: scope instances</span> -</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a><span class="sd"> """</span> -</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">_traverse_scope</span><span class="p">(</span><span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)))</span> -</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a> -</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a> -</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a><span class="k">def</span> <span class="nf">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a><span class="sd"> Build a scope tree.</span> -</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a> -</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a><span class="sd"> Args:</span> -</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a><span class="sd"> expression (exp.Expression): expression to build the scope tree for</span> -</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a><span class="sd"> Returns:</span> -</span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a><span class="sd"> Scope: root scope</span> -</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a><span class="sd"> """</span> -</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> <span class="k">return</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> -</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> -</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> -</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a><span class="k">def</span> <span class="nf">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> -</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="k">yield from</span> <span class="n">_traverse_select</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="k">yield from</span> <span class="n">_traverse_union</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> -</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a> <span class="k">yield from</span> <span class="n">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> <span class="k">pass</span> -</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unexpected expression type: </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-517"><a href="#L-517"><span class="linenos">517</span></a> <span class="k">yield</span> <span class="n">scope</span> -</span><span id="L-518"><a href="#L-518"><span class="linenos">518</span></a> -</span><span id="L-519"><a href="#L-519"><span class="linenos">519</span></a> -</span><span id="L-520"><a href="#L-520"><span class="linenos">520</span></a><span class="k">def</span> <span class="nf">_traverse_select</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-521"><a href="#L-521"><span class="linenos">521</span></a> <span class="k">yield from</span> <span class="n">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-522"><a href="#L-522"><span class="linenos">522</span></a> <span class="k">yield from</span> <span class="n">_traverse_tables</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-523"><a href="#L-523"><span class="linenos">523</span></a> <span class="k">yield from</span> <span class="n">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> +</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> +</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a><span class="sd"> Returns:</span> +</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> +</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a><span class="sd"> """</span> +</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> +</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> +</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> +</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> +</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> +</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a> +</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a> +</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a><span class="k">def</span> <span class="nf">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">Scope</span><span class="p">]:</span> +</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a><span class="sd"> Traverse an expression by it's "scopes".</span> +</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a> +</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a><span class="sd"> "Scope" represents the current context of a Select statement.</span> +</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a> +</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a><span class="sd"> This is helpful for optimizing queries, where we need more information than</span> +</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a><span class="sd"> the expression tree itself. For example, we might care about the source</span> +</span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a><span class="sd"> names within a subquery. Returns a list because a generator could result in</span> +</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a><span class="sd"> incomplete properties which is confusing.</span> +</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a> +</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a><span class="sd"> Examples:</span> +</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT a FROM x) AS y")</span> +</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a><span class="sd"> >>> scopes = traverse_scope(expression)</span> +</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a><span class="sd"> >>> scopes[0].expression.sql(), list(scopes[0].sources)</span> +</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a><span class="sd"> ('SELECT a FROM x', ['x'])</span> +</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a><span class="sd"> >>> scopes[1].expression.sql(), list(scopes[1].sources)</span> +</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a><span class="sd"> ('SELECT a FROM (SELECT a FROM x) AS y', ['y'])</span> +</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a> +</span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a><span class="sd"> Args:</span> +</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a><span class="sd"> expression (exp.Expression): expression to traverse</span> +</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a><span class="sd"> Returns:</span> +</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a><span class="sd"> list[Scope]: scope instances</span> +</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a><span class="sd"> """</span> +</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unionable</span><span class="p">):</span> +</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">_traverse_scope</span><span class="p">(</span><span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)))</span> +</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> +</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> +</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a><span class="k">def</span> <span class="nf">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">Scope</span><span class="p">]:</span> +</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a><span class="sd"> Build a scope tree.</span> +</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> +</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a><span class="sd"> Args:</span> +</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a><span class="sd"> expression (exp.Expression): expression to build the scope tree for</span> +</span><span id="L-517"><a href="#L-517"><span class="linenos">517</span></a><span class="sd"> Returns:</span> +</span><span id="L-518"><a href="#L-518"><span class="linenos">518</span></a><span class="sd"> Scope: root scope</span> +</span><span id="L-519"><a href="#L-519"><span class="linenos">519</span></a><span class="sd"> """</span> +</span><span id="L-520"><a href="#L-520"><span class="linenos">520</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-521"><a href="#L-521"><span class="linenos">521</span></a> <span class="k">if</span> <span class="n">scopes</span><span class="p">:</span> +</span><span id="L-522"><a href="#L-522"><span class="linenos">522</span></a> <span class="k">return</span> <span class="n">scopes</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> +</span><span id="L-523"><a href="#L-523"><span class="linenos">523</span></a> <span class="k">return</span> <span class="kc">None</span> </span><span id="L-524"><a href="#L-524"><span class="linenos">524</span></a> </span><span id="L-525"><a href="#L-525"><span class="linenos">525</span></a> -</span><span id="L-526"><a href="#L-526"><span class="linenos">526</span></a><span class="k">def</span> <span class="nf">_traverse_union</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-527"><a href="#L-527"><span class="linenos">527</span></a> <span class="k">yield from</span> <span class="n">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> -</span><span id="L-528"><a href="#L-528"><span class="linenos">528</span></a> -</span><span id="L-529"><a href="#L-529"><span class="linenos">529</span></a> <span class="c1"># The last scope to be yield should be the top most scope</span> -</span><span id="L-530"><a href="#L-530"><span class="linenos">530</span></a> <span class="n">left</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-531"><a href="#L-531"><span class="linenos">531</span></a> <span class="k">for</span> <span class="n">left</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span><span class="p">)):</span> -</span><span id="L-532"><a href="#L-532"><span class="linenos">532</span></a> <span class="k">yield</span> <span class="n">left</span> -</span><span id="L-533"><a href="#L-533"><span class="linenos">533</span></a> -</span><span id="L-534"><a href="#L-534"><span class="linenos">534</span></a> <span class="n">right</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-535"><a href="#L-535"><span class="linenos">535</span></a> <span class="k">for</span> <span class="n">right</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span><span class="p">)):</span> -</span><span id="L-536"><a href="#L-536"><span class="linenos">536</span></a> <span class="k">yield</span> <span class="n">right</span> -</span><span id="L-537"><a href="#L-537"><span class="linenos">537</span></a> -</span><span id="L-538"><a href="#L-538"><span class="linenos">538</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[</span><span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">]</span> -</span><span id="L-539"><a href="#L-539"><span class="linenos">539</span></a> -</span><span id="L-540"><a href="#L-540"><span class="linenos">540</span></a> -</span><span id="L-541"><a href="#L-541"><span class="linenos">541</span></a><span class="k">def</span> <span class="nf">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-542"><a href="#L-542"><span class="linenos">542</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-543"><a href="#L-543"><span class="linenos">543</span></a> -</span><span id="L-544"><a href="#L-544"><span class="linenos">544</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">:</span> -</span><span id="L-545"><a href="#L-545"><span class="linenos">545</span></a> <span class="n">recursive_scope</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-546"><a href="#L-546"><span class="linenos">546</span></a> -</span><span id="L-547"><a href="#L-547"><span class="linenos">547</span></a> <span class="c1"># if the scope is a recursive cte, it must be in the form of</span> -</span><span id="L-548"><a href="#L-548"><span class="linenos">548</span></a> <span class="c1"># base_case UNION recursive. thus the recursive scope is the first</span> -</span><span id="L-549"><a href="#L-549"><span class="linenos">549</span></a> <span class="c1"># section of the union.</span> -</span><span id="L-550"><a href="#L-550"><span class="linenos">550</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"with"</span><span class="p">]</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> -</span><span id="L-551"><a href="#L-551"><span class="linenos">551</span></a> <span class="n">union</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-552"><a href="#L-552"><span class="linenos">552</span></a> -</span><span id="L-553"><a href="#L-553"><span class="linenos">553</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">union</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="L-554"><a href="#L-554"><span class="linenos">554</span></a> <span class="n">recursive_scope</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">union</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> -</span><span id="L-555"><a href="#L-555"><span class="linenos">555</span></a> -</span><span id="L-556"><a href="#L-556"><span class="linenos">556</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span> -</span><span id="L-557"><a href="#L-557"><span class="linenos">557</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span> -</span><span id="L-558"><a href="#L-558"><span class="linenos">558</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> -</span><span id="L-559"><a href="#L-559"><span class="linenos">559</span></a> <span class="n">chain_sources</span><span class="o">=</span><span class="n">sources</span><span class="p">,</span> -</span><span id="L-560"><a href="#L-560"><span class="linenos">560</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> -</span><span id="L-561"><a href="#L-561"><span class="linenos">561</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span><span class="p">,</span> -</span><span id="L-562"><a href="#L-562"><span class="linenos">562</span></a> <span class="p">)</span> -</span><span id="L-563"><a href="#L-563"><span class="linenos">563</span></a> <span class="p">):</span> -</span><span id="L-564"><a href="#L-564"><span class="linenos">564</span></a> <span class="k">yield</span> <span class="n">child_scope</span> -</span><span id="L-565"><a href="#L-565"><span class="linenos">565</span></a> -</span><span id="L-566"><a href="#L-566"><span class="linenos">566</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-567"><a href="#L-567"><span class="linenos">567</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">child_scope</span> -</span><span id="L-568"><a href="#L-568"><span class="linenos">568</span></a> -</span><span id="L-569"><a href="#L-569"><span class="linenos">569</span></a> <span class="k">if</span> <span class="n">recursive_scope</span><span class="p">:</span> -</span><span id="L-570"><a href="#L-570"><span class="linenos">570</span></a> <span class="n">child_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">recursive_scope</span><span class="p">)</span> -</span><span id="L-571"><a href="#L-571"><span class="linenos">571</span></a> -</span><span id="L-572"><a href="#L-572"><span class="linenos">572</span></a> <span class="c1"># append the final child_scope yielded</span> -</span><span id="L-573"><a href="#L-573"><span class="linenos">573</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">cte_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> -</span><span id="L-574"><a href="#L-574"><span class="linenos">574</span></a> -</span><span id="L-575"><a href="#L-575"><span class="linenos">575</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">sources</span><span class="p">)</span> -</span><span id="L-576"><a href="#L-576"><span class="linenos">576</span></a> -</span><span id="L-577"><a href="#L-577"><span class="linenos">577</span></a> -</span><span id="L-578"><a href="#L-578"><span class="linenos">578</span></a><span class="k">def</span> <span class="nf">_traverse_tables</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-579"><a href="#L-579"><span class="linenos">579</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-580"><a href="#L-580"><span class="linenos">580</span></a> -</span><span id="L-581"><a href="#L-581"><span class="linenos">581</span></a> <span class="c1"># Traverse FROMs, JOINs, and LATERALs in the order they are defined</span> -</span><span id="L-582"><a href="#L-582"><span class="linenos">582</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-583"><a href="#L-583"><span class="linenos">583</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-584"><a href="#L-584"><span class="linenos">584</span></a> <span class="k">if</span> <span class="n">from_</span><span class="p">:</span> -</span><span id="L-585"><a href="#L-585"><span class="linenos">585</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> -</span><span id="L-586"><a href="#L-586"><span class="linenos">586</span></a> -</span><span id="L-587"><a href="#L-587"><span class="linenos">587</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> -</span><span id="L-588"><a href="#L-588"><span class="linenos">588</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> -</span><span id="L-589"><a href="#L-589"><span class="linenos">589</span></a> -</span><span id="L-590"><a href="#L-590"><span class="linenos">590</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"laterals"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span> +</span><span id="L-526"><a href="#L-526"><span class="linenos">526</span></a><span class="k">def</span> <span class="nf">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-527"><a href="#L-527"><span class="linenos">527</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">):</span> +</span><span id="L-528"><a href="#L-528"><span class="linenos">528</span></a> <span class="k">yield from</span> <span class="n">_traverse_select</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-529"><a href="#L-529"><span class="linenos">529</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="L-530"><a href="#L-530"><span class="linenos">530</span></a> <span class="k">yield from</span> <span class="n">_traverse_union</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-531"><a href="#L-531"><span class="linenos">531</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="L-532"><a href="#L-532"><span class="linenos">532</span></a> <span class="k">yield from</span> <span class="n">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-533"><a href="#L-533"><span class="linenos">533</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-534"><a href="#L-534"><span class="linenos">534</span></a> <span class="c1"># This case corresponds to a "join construct", i.e. (tbl1 JOIN tbl2 ON ..)</span> +</span><span id="L-535"><a href="#L-535"><span class="linenos">535</span></a> <span class="k">yield from</span> <span class="n">_traverse_tables</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-536"><a href="#L-536"><span class="linenos">536</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="L-537"><a href="#L-537"><span class="linenos">537</span></a> <span class="k">pass</span> +</span><span id="L-538"><a href="#L-538"><span class="linenos">538</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-539"><a href="#L-539"><span class="linenos">539</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unexpected expression type: </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-540"><a href="#L-540"><span class="linenos">540</span></a> <span class="k">yield</span> <span class="n">scope</span> +</span><span id="L-541"><a href="#L-541"><span class="linenos">541</span></a> +</span><span id="L-542"><a href="#L-542"><span class="linenos">542</span></a> +</span><span id="L-543"><a href="#L-543"><span class="linenos">543</span></a><span class="k">def</span> <span class="nf">_traverse_select</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-544"><a href="#L-544"><span class="linenos">544</span></a> <span class="k">yield from</span> <span class="n">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-545"><a href="#L-545"><span class="linenos">545</span></a> <span class="k">yield from</span> <span class="n">_traverse_tables</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-546"><a href="#L-546"><span class="linenos">546</span></a> <span class="k">yield from</span> <span class="n">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-547"><a href="#L-547"><span class="linenos">547</span></a> +</span><span id="L-548"><a href="#L-548"><span class="linenos">548</span></a> +</span><span id="L-549"><a href="#L-549"><span class="linenos">549</span></a><span class="k">def</span> <span class="nf">_traverse_union</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-550"><a href="#L-550"><span class="linenos">550</span></a> <span class="k">yield from</span> <span class="n">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span> +</span><span id="L-551"><a href="#L-551"><span class="linenos">551</span></a> +</span><span id="L-552"><a href="#L-552"><span class="linenos">552</span></a> <span class="c1"># The last scope to be yield should be the top most scope</span> +</span><span id="L-553"><a href="#L-553"><span class="linenos">553</span></a> <span class="n">left</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-554"><a href="#L-554"><span class="linenos">554</span></a> <span class="k">for</span> <span class="n">left</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span><span class="p">)):</span> +</span><span id="L-555"><a href="#L-555"><span class="linenos">555</span></a> <span class="k">yield</span> <span class="n">left</span> +</span><span id="L-556"><a href="#L-556"><span class="linenos">556</span></a> +</span><span id="L-557"><a href="#L-557"><span class="linenos">557</span></a> <span class="n">right</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-558"><a href="#L-558"><span class="linenos">558</span></a> <span class="k">for</span> <span class="n">right</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span><span class="p">)):</span> +</span><span id="L-559"><a href="#L-559"><span class="linenos">559</span></a> <span class="k">yield</span> <span class="n">right</span> +</span><span id="L-560"><a href="#L-560"><span class="linenos">560</span></a> +</span><span id="L-561"><a href="#L-561"><span class="linenos">561</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[</span><span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">]</span> +</span><span id="L-562"><a href="#L-562"><span class="linenos">562</span></a> +</span><span id="L-563"><a href="#L-563"><span class="linenos">563</span></a> +</span><span id="L-564"><a href="#L-564"><span class="linenos">564</span></a><span class="k">def</span> <span class="nf">_traverse_ctes</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-565"><a href="#L-565"><span class="linenos">565</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-566"><a href="#L-566"><span class="linenos">566</span></a> +</span><span id="L-567"><a href="#L-567"><span class="linenos">567</span></a> <span class="k">for</span> <span class="n">cte</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">ctes</span><span class="p">:</span> +</span><span id="L-568"><a href="#L-568"><span class="linenos">568</span></a> <span class="n">recursive_scope</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-569"><a href="#L-569"><span class="linenos">569</span></a> +</span><span id="L-570"><a href="#L-570"><span class="linenos">570</span></a> <span class="c1"># if the scope is a recursive cte, it must be in the form of</span> +</span><span id="L-571"><a href="#L-571"><span class="linenos">571</span></a> <span class="c1"># base_case UNION recursive. thus the recursive scope is the first</span> +</span><span id="L-572"><a href="#L-572"><span class="linenos">572</span></a> <span class="c1"># section of the union.</span> +</span><span id="L-573"><a href="#L-573"><span class="linenos">573</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"with"</span><span class="p">]</span><span class="o">.</span><span class="n">recursive</span><span class="p">:</span> +</span><span id="L-574"><a href="#L-574"><span class="linenos">574</span></a> <span class="n">union</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-575"><a href="#L-575"><span class="linenos">575</span></a> +</span><span id="L-576"><a href="#L-576"><span class="linenos">576</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">union</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="L-577"><a href="#L-577"><span class="linenos">577</span></a> <span class="n">recursive_scope</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">union</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> +</span><span id="L-578"><a href="#L-578"><span class="linenos">578</span></a> +</span><span id="L-579"><a href="#L-579"><span class="linenos">579</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span> +</span><span id="L-580"><a href="#L-580"><span class="linenos">580</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span> +</span><span id="L-581"><a href="#L-581"><span class="linenos">581</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> +</span><span id="L-582"><a href="#L-582"><span class="linenos">582</span></a> <span class="n">chain_sources</span><span class="o">=</span><span class="n">sources</span><span class="p">,</span> +</span><span id="L-583"><a href="#L-583"><span class="linenos">583</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="n">cte</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> +</span><span id="L-584"><a href="#L-584"><span class="linenos">584</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span><span class="p">,</span> +</span><span id="L-585"><a href="#L-585"><span class="linenos">585</span></a> <span class="p">)</span> +</span><span id="L-586"><a href="#L-586"><span class="linenos">586</span></a> <span class="p">):</span> +</span><span id="L-587"><a href="#L-587"><span class="linenos">587</span></a> <span class="k">yield</span> <span class="n">child_scope</span> +</span><span id="L-588"><a href="#L-588"><span class="linenos">588</span></a> +</span><span id="L-589"><a href="#L-589"><span class="linenos">589</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-590"><a href="#L-590"><span class="linenos">590</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">child_scope</span> </span><span id="L-591"><a href="#L-591"><span class="linenos">591</span></a> -</span><span id="L-592"><a href="#L-592"><span class="linenos">592</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> -</span><span id="L-593"><a href="#L-593"><span class="linenos">593</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-594"><a href="#L-594"><span class="linenos">594</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-595"><a href="#L-595"><span class="linenos">595</span></a> <span class="n">source_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-596"><a href="#L-596"><span class="linenos">596</span></a> -</span><span id="L-597"><a href="#L-597"><span class="linenos">597</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="L-598"><a href="#L-598"><span class="linenos">598</span></a> <span class="c1"># This is a reference to a parent source (e.g. a CTE), not an actual table.</span> -</span><span id="L-599"><a href="#L-599"><span class="linenos">599</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">source_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span> -</span><span id="L-600"><a href="#L-600"><span class="linenos">600</span></a> <span class="k">elif</span> <span class="n">source_name</span> <span class="ow">in</span> <span class="n">sources</span><span class="p">:</span> -</span><span id="L-601"><a href="#L-601"><span class="linenos">601</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">find_new_name</span><span class="p">(</span><span class="n">sources</span><span class="p">,</span> <span class="n">table_name</span><span class="p">)]</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="L-602"><a href="#L-602"><span class="linenos">602</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-603"><a href="#L-603"><span class="linenos">603</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">source_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="L-604"><a href="#L-604"><span class="linenos">604</span></a> <span class="k">continue</span> -</span><span id="L-605"><a href="#L-605"><span class="linenos">605</span></a> -</span><span id="L-606"><a href="#L-606"><span class="linenos">606</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="L-607"><a href="#L-607"><span class="linenos">607</span></a> <span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">sources</span> -</span><span id="L-608"><a href="#L-608"><span class="linenos">608</span></a> <span class="n">scope_type</span> <span class="o">=</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> -</span><span id="L-609"><a href="#L-609"><span class="linenos">609</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">udtf_scopes</span> -</span><span id="L-610"><a href="#L-610"><span class="linenos">610</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-611"><a href="#L-611"><span class="linenos">611</span></a> <span class="n">lateral_sources</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-612"><a href="#L-612"><span class="linenos">612</span></a> <span class="n">scope_type</span> <span class="o">=</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> -</span><span id="L-613"><a href="#L-613"><span class="linenos">613</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_table_scopes</span> -</span><span id="L-614"><a href="#L-614"><span class="linenos">614</span></a> -</span><span id="L-615"><a href="#L-615"><span class="linenos">615</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span> -</span><span id="L-616"><a href="#L-616"><span class="linenos">616</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span> -</span><span id="L-617"><a href="#L-617"><span class="linenos">617</span></a> <span class="n">expression</span><span class="p">,</span> -</span><span id="L-618"><a href="#L-618"><span class="linenos">618</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="n">lateral_sources</span><span class="p">,</span> -</span><span id="L-619"><a href="#L-619"><span class="linenos">619</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> -</span><span id="L-620"><a href="#L-620"><span class="linenos">620</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> -</span><span id="L-621"><a href="#L-621"><span class="linenos">621</span></a> <span class="p">)</span> -</span><span id="L-622"><a href="#L-622"><span class="linenos">622</span></a> <span class="p">):</span> -</span><span id="L-623"><a href="#L-623"><span class="linenos">623</span></a> <span class="k">yield</span> <span class="n">child_scope</span> -</span><span id="L-624"><a href="#L-624"><span class="linenos">624</span></a> -</span><span id="L-625"><a href="#L-625"><span class="linenos">625</span></a> <span class="c1"># Tables without aliases will be set as ""</span> -</span><span id="L-626"><a href="#L-626"><span class="linenos">626</span></a> <span class="c1"># This shouldn't be a problem once qualify_columns runs, as it adds aliases on everything.</span> -</span><span id="L-627"><a href="#L-627"><span class="linenos">627</span></a> <span class="c1"># Until then, this means that only a single, unaliased derived table is allowed (rather,</span> -</span><span id="L-628"><a href="#L-628"><span class="linenos">628</span></a> <span class="c1"># the latest one wins.</span> -</span><span id="L-629"><a href="#L-629"><span class="linenos">629</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-630"><a href="#L-630"><span class="linenos">630</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">child_scope</span> -</span><span id="L-631"><a href="#L-631"><span class="linenos">631</span></a> -</span><span id="L-632"><a href="#L-632"><span class="linenos">632</span></a> <span class="c1"># append the final child_scope yielded</span> -</span><span id="L-633"><a href="#L-633"><span class="linenos">633</span></a> <span class="n">scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> -</span><span id="L-634"><a href="#L-634"><span class="linenos">634</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">table_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> -</span><span id="L-635"><a href="#L-635"><span class="linenos">635</span></a> -</span><span id="L-636"><a href="#L-636"><span class="linenos">636</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">sources</span><span class="p">)</span> -</span><span id="L-637"><a href="#L-637"><span class="linenos">637</span></a> -</span><span id="L-638"><a href="#L-638"><span class="linenos">638</span></a> -</span><span id="L-639"><a href="#L-639"><span class="linenos">639</span></a><span class="k">def</span> <span class="nf">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> -</span><span id="L-640"><a href="#L-640"><span class="linenos">640</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">subqueries</span><span class="p">:</span> -</span><span id="L-641"><a href="#L-641"><span class="linenos">641</span></a> <span class="n">top</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-642"><a href="#L-642"><span class="linenos">642</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">subquery</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span><span class="p">)):</span> -</span><span id="L-643"><a href="#L-643"><span class="linenos">643</span></a> <span class="k">yield</span> <span class="n">child_scope</span> -</span><span id="L-644"><a href="#L-644"><span class="linenos">644</span></a> <span class="n">top</span> <span class="o">=</span> <span class="n">child_scope</span> -</span><span id="L-645"><a href="#L-645"><span class="linenos">645</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">top</span><span class="p">)</span> -</span><span id="L-646"><a href="#L-646"><span class="linenos">646</span></a> -</span><span id="L-647"><a href="#L-647"><span class="linenos">647</span></a> -</span><span id="L-648"><a href="#L-648"><span class="linenos">648</span></a><span class="k">def</span> <span class="nf">walk_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-649"><a href="#L-649"><span class="linenos">649</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-650"><a href="#L-650"><span class="linenos">650</span></a><span class="sd"> Returns a generator object which visits all nodes in the syntrax tree, stopping at</span> -</span><span id="L-651"><a href="#L-651"><span class="linenos">651</span></a><span class="sd"> nodes that start child scopes.</span> -</span><span id="L-652"><a href="#L-652"><span class="linenos">652</span></a> -</span><span id="L-653"><a href="#L-653"><span class="linenos">653</span></a><span class="sd"> Args:</span> -</span><span id="L-654"><a href="#L-654"><span class="linenos">654</span></a><span class="sd"> expression (exp.Expression):</span> -</span><span id="L-655"><a href="#L-655"><span class="linenos">655</span></a><span class="sd"> bfs (bool): if set to True the BFS traversal order will be applied,</span> -</span><span id="L-656"><a href="#L-656"><span class="linenos">656</span></a><span class="sd"> otherwise the DFS traversal will be used instead.</span> -</span><span id="L-657"><a href="#L-657"><span class="linenos">657</span></a> -</span><span id="L-658"><a href="#L-658"><span class="linenos">658</span></a><span class="sd"> Yields:</span> -</span><span id="L-659"><a href="#L-659"><span class="linenos">659</span></a><span class="sd"> tuple[exp.Expression, Optional[exp.Expression], str]: node, parent, arg key</span> -</span><span id="L-660"><a href="#L-660"><span class="linenos">660</span></a><span class="sd"> """</span> -</span><span id="L-661"><a href="#L-661"><span class="linenos">661</span></a> <span class="c1"># We'll use this variable to pass state into the dfs generator.</span> -</span><span id="L-662"><a href="#L-662"><span class="linenos">662</span></a> <span class="c1"># Whenever we set it to True, we exclude a subtree from traversal.</span> -</span><span id="L-663"><a href="#L-663"><span class="linenos">663</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-664"><a href="#L-664"><span class="linenos">664</span></a> -</span><span id="L-665"><a href="#L-665"><span class="linenos">665</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">,</span> <span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="n">prune</span><span class="p">):</span> -</span><span id="L-666"><a href="#L-666"><span class="linenos">666</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-667"><a href="#L-667"><span class="linenos">667</span></a> -</span><span id="L-668"><a href="#L-668"><span class="linenos">668</span></a> <span class="k">yield</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> +</span><span id="L-592"><a href="#L-592"><span class="linenos">592</span></a> <span class="k">if</span> <span class="n">recursive_scope</span><span class="p">:</span> +</span><span id="L-593"><a href="#L-593"><span class="linenos">593</span></a> <span class="n">child_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">recursive_scope</span><span class="p">)</span> +</span><span id="L-594"><a href="#L-594"><span class="linenos">594</span></a> +</span><span id="L-595"><a href="#L-595"><span class="linenos">595</span></a> <span class="c1"># append the final child_scope yielded</span> +</span><span id="L-596"><a href="#L-596"><span class="linenos">596</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">cte_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> +</span><span id="L-597"><a href="#L-597"><span class="linenos">597</span></a> +</span><span id="L-598"><a href="#L-598"><span class="linenos">598</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">sources</span><span class="p">)</span> +</span><span id="L-599"><a href="#L-599"><span class="linenos">599</span></a> +</span><span id="L-600"><a href="#L-600"><span class="linenos">600</span></a> +</span><span id="L-601"><a href="#L-601"><span class="linenos">601</span></a><span class="k">def</span> <span class="nf">_traverse_tables</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-602"><a href="#L-602"><span class="linenos">602</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-603"><a href="#L-603"><span class="linenos">603</span></a> +</span><span id="L-604"><a href="#L-604"><span class="linenos">604</span></a> <span class="c1"># Traverse FROMs, JOINs, and LATERALs in the order they are defined</span> +</span><span id="L-605"><a href="#L-605"><span class="linenos">605</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-606"><a href="#L-606"><span class="linenos">606</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> +</span><span id="L-607"><a href="#L-607"><span class="linenos">607</span></a> <span class="k">if</span> <span class="n">from_</span><span class="p">:</span> +</span><span id="L-608"><a href="#L-608"><span class="linenos">608</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">from_</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> +</span><span id="L-609"><a href="#L-609"><span class="linenos">609</span></a> +</span><span id="L-610"><a href="#L-610"><span class="linenos">610</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]:</span> +</span><span id="L-611"><a href="#L-611"><span class="linenos">611</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> +</span><span id="L-612"><a href="#L-612"><span class="linenos">612</span></a> +</span><span id="L-613"><a href="#L-613"><span class="linenos">613</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-614"><a href="#L-614"><span class="linenos">614</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-615"><a href="#L-615"><span class="linenos">615</span></a> +</span><span id="L-616"><a href="#L-616"><span class="linenos">616</span></a> <span class="n">expressions</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"laterals"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[])</span> +</span><span id="L-617"><a href="#L-617"><span class="linenos">617</span></a> +</span><span id="L-618"><a href="#L-618"><span class="linenos">618</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">expressions</span><span class="p">:</span> +</span><span id="L-619"><a href="#L-619"><span class="linenos">619</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-620"><a href="#L-620"><span class="linenos">620</span></a> <span class="n">table_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-621"><a href="#L-621"><span class="linenos">621</span></a> <span class="n">source_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-622"><a href="#L-622"><span class="linenos">622</span></a> +</span><span id="L-623"><a href="#L-623"><span class="linenos">623</span></a> <span class="k">if</span> <span class="n">table_name</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="L-624"><a href="#L-624"><span class="linenos">624</span></a> <span class="c1"># This is a reference to a parent source (e.g. a CTE), not an actual table, unless</span> +</span><span id="L-625"><a href="#L-625"><span class="linenos">625</span></a> <span class="c1"># it is pivoted, because then we get back a new table and hence a new source.</span> +</span><span id="L-626"><a href="#L-626"><span class="linenos">626</span></a> <span class="n">pivots</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> +</span><span id="L-627"><a href="#L-627"><span class="linenos">627</span></a> <span class="k">if</span> <span class="n">pivots</span><span class="p">:</span> +</span><span id="L-628"><a href="#L-628"><span class="linenos">628</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">pivots</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="L-629"><a href="#L-629"><span class="linenos">629</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-630"><a href="#L-630"><span class="linenos">630</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">source_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">table_name</span><span class="p">]</span> +</span><span id="L-631"><a href="#L-631"><span class="linenos">631</span></a> <span class="k">elif</span> <span class="n">source_name</span> <span class="ow">in</span> <span class="n">sources</span><span class="p">:</span> +</span><span id="L-632"><a href="#L-632"><span class="linenos">632</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">find_new_name</span><span class="p">(</span><span class="n">sources</span><span class="p">,</span> <span class="n">table_name</span><span class="p">)]</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="L-633"><a href="#L-633"><span class="linenos">633</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-634"><a href="#L-634"><span class="linenos">634</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">source_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="L-635"><a href="#L-635"><span class="linenos">635</span></a> <span class="k">continue</span> +</span><span id="L-636"><a href="#L-636"><span class="linenos">636</span></a> +</span><span id="L-637"><a href="#L-637"><span class="linenos">637</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="L-638"><a href="#L-638"><span class="linenos">638</span></a> <span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">sources</span> +</span><span id="L-639"><a href="#L-639"><span class="linenos">639</span></a> <span class="n">scope_type</span> <span class="o">=</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> +</span><span id="L-640"><a href="#L-640"><span class="linenos">640</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">udtf_scopes</span> +</span><span id="L-641"><a href="#L-641"><span class="linenos">641</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-642"><a href="#L-642"><span class="linenos">642</span></a> <span class="n">lateral_sources</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-643"><a href="#L-643"><span class="linenos">643</span></a> <span class="n">scope_type</span> <span class="o">=</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> +</span><span id="L-644"><a href="#L-644"><span class="linenos">644</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_table_scopes</span> +</span><span id="L-645"><a href="#L-645"><span class="linenos">645</span></a> +</span><span id="L-646"><a href="#L-646"><span class="linenos">646</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span> +</span><span id="L-647"><a href="#L-647"><span class="linenos">647</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span> +</span><span id="L-648"><a href="#L-648"><span class="linenos">648</span></a> <span class="n">expression</span><span class="p">,</span> +</span><span id="L-649"><a href="#L-649"><span class="linenos">649</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="n">lateral_sources</span><span class="p">,</span> +</span><span id="L-650"><a href="#L-650"><span class="linenos">650</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">alias_column_names</span><span class="p">,</span> +</span><span id="L-651"><a href="#L-651"><span class="linenos">651</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> +</span><span id="L-652"><a href="#L-652"><span class="linenos">652</span></a> <span class="p">)</span> +</span><span id="L-653"><a href="#L-653"><span class="linenos">653</span></a> <span class="p">):</span> +</span><span id="L-654"><a href="#L-654"><span class="linenos">654</span></a> <span class="k">yield</span> <span class="n">child_scope</span> +</span><span id="L-655"><a href="#L-655"><span class="linenos">655</span></a> +</span><span id="L-656"><a href="#L-656"><span class="linenos">656</span></a> <span class="c1"># Tables without aliases will be set as ""</span> +</span><span id="L-657"><a href="#L-657"><span class="linenos">657</span></a> <span class="c1"># This shouldn't be a problem once qualify_columns runs, as it adds aliases on everything.</span> +</span><span id="L-658"><a href="#L-658"><span class="linenos">658</span></a> <span class="c1"># Until then, this means that only a single, unaliased derived table is allowed (rather,</span> +</span><span id="L-659"><a href="#L-659"><span class="linenos">659</span></a> <span class="c1"># the latest one wins.</span> +</span><span id="L-660"><a href="#L-660"><span class="linenos">660</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-661"><a href="#L-661"><span class="linenos">661</span></a> <span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">child_scope</span> +</span><span id="L-662"><a href="#L-662"><span class="linenos">662</span></a> +</span><span id="L-663"><a href="#L-663"><span class="linenos">663</span></a> <span class="c1"># append the final child_scope yielded</span> +</span><span id="L-664"><a href="#L-664"><span class="linenos">664</span></a> <span class="n">scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> +</span><span id="L-665"><a href="#L-665"><span class="linenos">665</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">table_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">child_scope</span><span class="p">)</span> +</span><span id="L-666"><a href="#L-666"><span class="linenos">666</span></a> +</span><span id="L-667"><a href="#L-667"><span class="linenos">667</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">sources</span><span class="p">)</span> +</span><span id="L-668"><a href="#L-668"><span class="linenos">668</span></a> </span><span id="L-669"><a href="#L-669"><span class="linenos">669</span></a> -</span><span id="L-670"><a href="#L-670"><span class="linenos">670</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> -</span><span id="L-671"><a href="#L-671"><span class="linenos">671</span></a> <span class="k">continue</span> -</span><span id="L-672"><a href="#L-672"><span class="linenos">672</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-673"><a href="#L-673"><span class="linenos">673</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> -</span><span id="L-674"><a href="#L-674"><span class="linenos">674</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)))</span> -</span><span id="L-675"><a href="#L-675"><span class="linenos">675</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">)</span> -</span><span id="L-676"><a href="#L-676"><span class="linenos">676</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">)</span> -</span><span id="L-677"><a href="#L-677"><span class="linenos">677</span></a> <span class="p">):</span> -</span><span id="L-678"><a href="#L-678"><span class="linenos">678</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-670"><a href="#L-670"><span class="linenos">670</span></a><span class="k">def</span> <span class="nf">_traverse_subqueries</span><span class="p">(</span><span class="n">scope</span><span class="p">):</span> +</span><span id="L-671"><a href="#L-671"><span class="linenos">671</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">subqueries</span><span class="p">:</span> +</span><span id="L-672"><a href="#L-672"><span class="linenos">672</span></a> <span class="n">top</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-673"><a href="#L-673"><span class="linenos">673</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">_traverse_scope</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">branch</span><span class="p">(</span><span class="n">subquery</span><span class="p">,</span> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span><span class="p">)):</span> +</span><span id="L-674"><a href="#L-674"><span class="linenos">674</span></a> <span class="k">yield</span> <span class="n">child_scope</span> +</span><span id="L-675"><a href="#L-675"><span class="linenos">675</span></a> <span class="n">top</span> <span class="o">=</span> <span class="n">child_scope</span> +</span><span id="L-676"><a href="#L-676"><span class="linenos">676</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">top</span><span class="p">)</span> +</span><span id="L-677"><a href="#L-677"><span class="linenos">677</span></a> +</span><span id="L-678"><a href="#L-678"><span class="linenos">678</span></a> +</span><span id="L-679"><a href="#L-679"><span class="linenos">679</span></a><span class="k">def</span> <span class="nf">walk_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-680"><a href="#L-680"><span class="linenos">680</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-681"><a href="#L-681"><span class="linenos">681</span></a><span class="sd"> Returns a generator object which visits all nodes in the syntrax tree, stopping at</span> +</span><span id="L-682"><a href="#L-682"><span class="linenos">682</span></a><span class="sd"> nodes that start child scopes.</span> +</span><span id="L-683"><a href="#L-683"><span class="linenos">683</span></a> +</span><span id="L-684"><a href="#L-684"><span class="linenos">684</span></a><span class="sd"> Args:</span> +</span><span id="L-685"><a href="#L-685"><span class="linenos">685</span></a><span class="sd"> expression (exp.Expression):</span> +</span><span id="L-686"><a href="#L-686"><span class="linenos">686</span></a><span class="sd"> bfs (bool): if set to True the BFS traversal order will be applied,</span> +</span><span id="L-687"><a href="#L-687"><span class="linenos">687</span></a><span class="sd"> otherwise the DFS traversal will be used instead.</span> +</span><span id="L-688"><a href="#L-688"><span class="linenos">688</span></a> +</span><span id="L-689"><a href="#L-689"><span class="linenos">689</span></a><span class="sd"> Yields:</span> +</span><span id="L-690"><a href="#L-690"><span class="linenos">690</span></a><span class="sd"> tuple[exp.Expression, Optional[exp.Expression], str]: node, parent, arg key</span> +</span><span id="L-691"><a href="#L-691"><span class="linenos">691</span></a><span class="sd"> """</span> +</span><span id="L-692"><a href="#L-692"><span class="linenos">692</span></a> <span class="c1"># We'll use this variable to pass state into the dfs generator.</span> +</span><span id="L-693"><a href="#L-693"><span class="linenos">693</span></a> <span class="c1"># Whenever we set it to True, we exclude a subtree from traversal.</span> +</span><span id="L-694"><a href="#L-694"><span class="linenos">694</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-695"><a href="#L-695"><span class="linenos">695</span></a> +</span><span id="L-696"><a href="#L-696"><span class="linenos">696</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">,</span> <span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="n">prune</span><span class="p">):</span> +</span><span id="L-697"><a href="#L-697"><span class="linenos">697</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-698"><a href="#L-698"><span class="linenos">698</span></a> +</span><span id="L-699"><a href="#L-699"><span class="linenos">699</span></a> <span class="k">yield</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> +</span><span id="L-700"><a href="#L-700"><span class="linenos">700</span></a> +</span><span id="L-701"><a href="#L-701"><span class="linenos">701</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> +</span><span id="L-702"><a href="#L-702"><span class="linenos">702</span></a> <span class="k">continue</span> +</span><span id="L-703"><a href="#L-703"><span class="linenos">703</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-704"><a href="#L-704"><span class="linenos">704</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> +</span><span id="L-705"><a href="#L-705"><span class="linenos">705</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)))</span> +</span><span id="L-706"><a href="#L-706"><span class="linenos">706</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">)</span> +</span><span id="L-707"><a href="#L-707"><span class="linenos">707</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">)</span> +</span><span id="L-708"><a href="#L-708"><span class="linenos">708</span></a> <span class="p">):</span> +</span><span id="L-709"><a href="#L-709"><span class="linenos">709</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">True</span> </span></pre></div> @@ -881,13 +912,13 @@ </div> <a class="headerlink" href="#ScopeType"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="ScopeType-11"><a href="#ScopeType-11"><span class="linenos">11</span></a><span class="k">class</span> <span class="nc">ScopeType</span><span class="p">(</span><span class="n">Enum</span><span class="p">):</span> -</span><span id="ScopeType-12"><a href="#ScopeType-12"><span class="linenos">12</span></a> <span class="n">ROOT</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="ScopeType-13"><a href="#ScopeType-13"><span class="linenos">13</span></a> <span class="n">SUBQUERY</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="ScopeType-14"><a href="#ScopeType-14"><span class="linenos">14</span></a> <span class="n">DERIVED_TABLE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="ScopeType-15"><a href="#ScopeType-15"><span class="linenos">15</span></a> <span class="n">CTE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="ScopeType-16"><a href="#ScopeType-16"><span class="linenos">16</span></a> <span class="n">UNION</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> -</span><span id="ScopeType-17"><a href="#ScopeType-17"><span class="linenos">17</span></a> <span class="n">UDTF</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="ScopeType-12"><a href="#ScopeType-12"><span class="linenos">12</span></a><span class="k">class</span> <span class="nc">ScopeType</span><span class="p">(</span><span class="n">Enum</span><span class="p">):</span> +</span><span id="ScopeType-13"><a href="#ScopeType-13"><span class="linenos">13</span></a> <span class="n">ROOT</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="ScopeType-14"><a href="#ScopeType-14"><span class="linenos">14</span></a> <span class="n">SUBQUERY</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="ScopeType-15"><a href="#ScopeType-15"><span class="linenos">15</span></a> <span class="n">DERIVED_TABLE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="ScopeType-16"><a href="#ScopeType-16"><span class="linenos">16</span></a> <span class="n">CTE</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="ScopeType-17"><a href="#ScopeType-17"><span class="linenos">17</span></a> <span class="n">UNION</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> +</span><span id="ScopeType-18"><a href="#ScopeType-18"><span class="linenos">18</span></a> <span class="n">UDTF</span> <span class="o">=</span> <span class="n">auto</span><span class="p">()</span> </span></pre></div> @@ -989,451 +1020,465 @@ </div> <a class="headerlink" href="#Scope"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope-20"><a href="#Scope-20"><span class="linenos"> 20</span></a><span class="k">class</span> <span class="nc">Scope</span><span class="p">:</span> -</span><span id="Scope-21"><a href="#Scope-21"><span class="linenos"> 21</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-22"><a href="#Scope-22"><span class="linenos"> 22</span></a><span class="sd"> Selection scope.</span> -</span><span id="Scope-23"><a href="#Scope-23"><span class="linenos"> 23</span></a> -</span><span id="Scope-24"><a href="#Scope-24"><span class="linenos"> 24</span></a><span class="sd"> Attributes:</span> -</span><span id="Scope-25"><a href="#Scope-25"><span class="linenos"> 25</span></a><span class="sd"> expression (exp.Select|exp.Union): Root expression of this scope</span> -</span><span id="Scope-26"><a href="#Scope-26"><span class="linenos"> 26</span></a><span class="sd"> sources (dict[str, exp.Table|Scope]): Mapping of source name to either</span> -</span><span id="Scope-27"><a href="#Scope-27"><span class="linenos"> 27</span></a><span class="sd"> a Table expression or another Scope instance. For example:</span> -</span><span id="Scope-28"><a href="#Scope-28"><span class="linenos"> 28</span></a><span class="sd"> SELECT * FROM x {"x": Table(this="x")}</span> -</span><span id="Scope-29"><a href="#Scope-29"><span class="linenos"> 29</span></a><span class="sd"> SELECT * FROM x AS y {"y": Table(this="x")}</span> -</span><span id="Scope-30"><a href="#Scope-30"><span class="linenos"> 30</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y {"y": Scope(...)}</span> -</span><span id="Scope-31"><a href="#Scope-31"><span class="linenos"> 31</span></a><span class="sd"> lateral_sources (dict[str, exp.Table|Scope]): Sources from laterals</span> -</span><span id="Scope-32"><a href="#Scope-32"><span class="linenos"> 32</span></a><span class="sd"> For example:</span> -</span><span id="Scope-33"><a href="#Scope-33"><span class="linenos"> 33</span></a><span class="sd"> SELECT c FROM x LATERAL VIEW EXPLODE (a) AS c;</span> -</span><span id="Scope-34"><a href="#Scope-34"><span class="linenos"> 34</span></a><span class="sd"> The LATERAL VIEW EXPLODE gets x as a source.</span> -</span><span id="Scope-35"><a href="#Scope-35"><span class="linenos"> 35</span></a><span class="sd"> outer_column_list (list[str]): If this is a derived table or CTE, and the outer query</span> -</span><span id="Scope-36"><a href="#Scope-36"><span class="linenos"> 36</span></a><span class="sd"> defines a column list of it's alias of this scope, this is that list of columns.</span> -</span><span id="Scope-37"><a href="#Scope-37"><span class="linenos"> 37</span></a><span class="sd"> For example:</span> -</span><span id="Scope-38"><a href="#Scope-38"><span class="linenos"> 38</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y(col1, col2)</span> -</span><span id="Scope-39"><a href="#Scope-39"><span class="linenos"> 39</span></a><span class="sd"> The inner query would have `["col1", "col2"]` for its `outer_column_list`</span> -</span><span id="Scope-40"><a href="#Scope-40"><span class="linenos"> 40</span></a><span class="sd"> parent (Scope): Parent scope</span> -</span><span id="Scope-41"><a href="#Scope-41"><span class="linenos"> 41</span></a><span class="sd"> scope_type (ScopeType): Type of this scope, relative to it's parent</span> -</span><span id="Scope-42"><a href="#Scope-42"><span class="linenos"> 42</span></a><span class="sd"> subquery_scopes (list[Scope]): List of all child scopes for subqueries</span> -</span><span id="Scope-43"><a href="#Scope-43"><span class="linenos"> 43</span></a><span class="sd"> cte_scopes (list[Scope]): List of all child scopes for CTEs</span> -</span><span id="Scope-44"><a href="#Scope-44"><span class="linenos"> 44</span></a><span class="sd"> derived_table_scopes (list[Scope]): List of all child scopes for derived_tables</span> -</span><span id="Scope-45"><a href="#Scope-45"><span class="linenos"> 45</span></a><span class="sd"> udtf_scopes (list[Scope]): List of all child scopes for user defined tabular functions</span> -</span><span id="Scope-46"><a href="#Scope-46"><span class="linenos"> 46</span></a><span class="sd"> table_scopes (list[Scope]): derived_table_scopes + udtf_scopes, in the order that they're defined</span> -</span><span id="Scope-47"><a href="#Scope-47"><span class="linenos"> 47</span></a><span class="sd"> union_scopes (list[Scope, Scope]): If this Scope is for a Union expression, this will be</span> -</span><span id="Scope-48"><a href="#Scope-48"><span class="linenos"> 48</span></a><span class="sd"> a list of the left and right child scopes.</span> -</span><span id="Scope-49"><a href="#Scope-49"><span class="linenos"> 49</span></a><span class="sd"> """</span> -</span><span id="Scope-50"><a href="#Scope-50"><span class="linenos"> 50</span></a> -</span><span id="Scope-51"><a href="#Scope-51"><span class="linenos"> 51</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> -</span><span id="Scope-52"><a href="#Scope-52"><span class="linenos"> 52</span></a> <span class="bp">self</span><span class="p">,</span> -</span><span id="Scope-53"><a href="#Scope-53"><span class="linenos"> 53</span></a> <span class="n">expression</span><span class="p">,</span> -</span><span id="Scope-54"><a href="#Scope-54"><span class="linenos"> 54</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope-55"><a href="#Scope-55"><span class="linenos"> 55</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope-56"><a href="#Scope-56"><span class="linenos"> 56</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope-57"><a href="#Scope-57"><span class="linenos"> 57</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> -</span><span id="Scope-58"><a href="#Scope-58"><span class="linenos"> 58</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope-59"><a href="#Scope-59"><span class="linenos"> 59</span></a> <span class="p">):</span> -</span><span id="Scope-60"><a href="#Scope-60"><span class="linenos"> 60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="Scope-61"><a href="#Scope-61"><span class="linenos"> 61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> -</span><span id="Scope-62"><a href="#Scope-62"><span class="linenos"> 62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> -</span><span id="Scope-63"><a href="#Scope-63"><span class="linenos"> 63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="Scope-64"><a href="#Scope-64"><span class="linenos"> 64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> -</span><span id="Scope-65"><a href="#Scope-65"><span class="linenos"> 65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> -</span><span id="Scope-66"><a href="#Scope-66"><span class="linenos"> 66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> -</span><span id="Scope-67"><a href="#Scope-67"><span class="linenos"> 67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-68"><a href="#Scope-68"><span class="linenos"> 68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-69"><a href="#Scope-69"><span class="linenos"> 69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-70"><a href="#Scope-70"><span class="linenos"> 70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-71"><a href="#Scope-71"><span class="linenos"> 71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-72"><a href="#Scope-72"><span class="linenos"> 72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-73"><a href="#Scope-73"><span class="linenos"> 73</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="Scope-74"><a href="#Scope-74"><span class="linenos"> 74</span></a> -</span><span id="Scope-75"><a href="#Scope-75"><span class="linenos"> 75</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-76"><a href="#Scope-76"><span class="linenos"> 76</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="Scope-77"><a href="#Scope-77"><span class="linenos"> 77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-78"><a href="#Scope-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-79"><a href="#Scope-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-80"><a href="#Scope-80"><span class="linenos"> 80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-81"><a href="#Scope-81"><span class="linenos"> 81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-82"><a href="#Scope-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-83"><a href="#Scope-83"><span class="linenos"> 83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-84"><a href="#Scope-84"><span class="linenos"> 84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-85"><a href="#Scope-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-86"><a href="#Scope-86"><span class="linenos"> 86</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope-87"><a href="#Scope-87"><span class="linenos"> 87</span></a> -</span><span id="Scope-88"><a href="#Scope-88"><span class="linenos"> 88</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> -</span><span id="Scope-89"><a href="#Scope-89"><span class="linenos"> 89</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> -</span><span id="Scope-90"><a href="#Scope-90"><span class="linenos"> 90</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> -</span><span id="Scope-91"><a href="#Scope-91"><span class="linenos"> 91</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> -</span><span id="Scope-92"><a href="#Scope-92"><span class="linenos"> 92</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> -</span><span id="Scope-93"><a href="#Scope-93"><span class="linenos"> 93</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> -</span><span id="Scope-94"><a href="#Scope-94"><span class="linenos"> 94</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> -</span><span id="Scope-95"><a href="#Scope-95"><span class="linenos"> 95</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> -</span><span id="Scope-96"><a href="#Scope-96"><span class="linenos"> 96</span></a> <span class="p">)</span> -</span><span id="Scope-97"><a href="#Scope-97"><span class="linenos"> 97</span></a> -</span><span id="Scope-98"><a href="#Scope-98"><span class="linenos"> 98</span></a> <span class="k">def</span> <span class="nf">_collect</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-99"><a href="#Scope-99"><span class="linenos"> 99</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-100"><a href="#Scope-100"><span class="linenos">100</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-101"><a href="#Scope-101"><span class="linenos">101</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-102"><a href="#Scope-102"><span class="linenos">102</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-103"><a href="#Scope-103"><span class="linenos">103</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-104"><a href="#Scope-104"><span class="linenos">104</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-105"><a href="#Scope-105"><span class="linenos">105</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-106"><a href="#Scope-106"><span class="linenos">106</span></a> -</span><span id="Scope-107"><a href="#Scope-107"><span class="linenos">107</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="Scope-108"><a href="#Scope-108"><span class="linenos">108</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span> -</span><span id="Scope-109"><a href="#Scope-109"><span class="linenos">109</span></a> <span class="k">continue</span> -</span><span id="Scope-110"><a href="#Scope-110"><span class="linenos">110</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> -</span><span id="Scope-111"><a href="#Scope-111"><span class="linenos">111</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-112"><a href="#Scope-112"><span class="linenos">112</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> -</span><span id="Scope-113"><a href="#Scope-113"><span class="linenos">113</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-114"><a href="#Scope-114"><span class="linenos">114</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> -</span><span id="Scope-115"><a href="#Scope-115"><span class="linenos">115</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-116"><a href="#Scope-116"><span class="linenos">116</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="Scope-117"><a href="#Scope-117"><span class="linenos">117</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-118"><a href="#Scope-118"><span class="linenos">118</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">):</span> -</span><span id="Scope-119"><a href="#Scope-119"><span class="linenos">119</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-120"><a href="#Scope-120"><span class="linenos">120</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)):</span> -</span><span id="Scope-121"><a href="#Scope-121"><span class="linenos">121</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-122"><a href="#Scope-122"><span class="linenos">122</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> -</span><span id="Scope-123"><a href="#Scope-123"><span class="linenos">123</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="Scope-124"><a href="#Scope-124"><span class="linenos">124</span></a> -</span><span id="Scope-125"><a href="#Scope-125"><span class="linenos">125</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">True</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope-21"><a href="#Scope-21"><span class="linenos"> 21</span></a><span class="k">class</span> <span class="nc">Scope</span><span class="p">:</span> +</span><span id="Scope-22"><a href="#Scope-22"><span class="linenos"> 22</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-23"><a href="#Scope-23"><span class="linenos"> 23</span></a><span class="sd"> Selection scope.</span> +</span><span id="Scope-24"><a href="#Scope-24"><span class="linenos"> 24</span></a> +</span><span id="Scope-25"><a href="#Scope-25"><span class="linenos"> 25</span></a><span class="sd"> Attributes:</span> +</span><span id="Scope-26"><a href="#Scope-26"><span class="linenos"> 26</span></a><span class="sd"> expression (exp.Select|exp.Union): Root expression of this scope</span> +</span><span id="Scope-27"><a href="#Scope-27"><span class="linenos"> 27</span></a><span class="sd"> sources (dict[str, exp.Table|Scope]): Mapping of source name to either</span> +</span><span id="Scope-28"><a href="#Scope-28"><span class="linenos"> 28</span></a><span class="sd"> a Table expression or another Scope instance. For example:</span> +</span><span id="Scope-29"><a href="#Scope-29"><span class="linenos"> 29</span></a><span class="sd"> SELECT * FROM x {"x": Table(this="x")}</span> +</span><span id="Scope-30"><a href="#Scope-30"><span class="linenos"> 30</span></a><span class="sd"> SELECT * FROM x AS y {"y": Table(this="x")}</span> +</span><span id="Scope-31"><a href="#Scope-31"><span class="linenos"> 31</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y {"y": Scope(...)}</span> +</span><span id="Scope-32"><a href="#Scope-32"><span class="linenos"> 32</span></a><span class="sd"> lateral_sources (dict[str, exp.Table|Scope]): Sources from laterals</span> +</span><span id="Scope-33"><a href="#Scope-33"><span class="linenos"> 33</span></a><span class="sd"> For example:</span> +</span><span id="Scope-34"><a href="#Scope-34"><span class="linenos"> 34</span></a><span class="sd"> SELECT c FROM x LATERAL VIEW EXPLODE (a) AS c;</span> +</span><span id="Scope-35"><a href="#Scope-35"><span class="linenos"> 35</span></a><span class="sd"> The LATERAL VIEW EXPLODE gets x as a source.</span> +</span><span id="Scope-36"><a href="#Scope-36"><span class="linenos"> 36</span></a><span class="sd"> outer_column_list (list[str]): If this is a derived table or CTE, and the outer query</span> +</span><span id="Scope-37"><a href="#Scope-37"><span class="linenos"> 37</span></a><span class="sd"> defines a column list of it's alias of this scope, this is that list of columns.</span> +</span><span id="Scope-38"><a href="#Scope-38"><span class="linenos"> 38</span></a><span class="sd"> For example:</span> +</span><span id="Scope-39"><a href="#Scope-39"><span class="linenos"> 39</span></a><span class="sd"> SELECT * FROM (SELECT ...) AS y(col1, col2)</span> +</span><span id="Scope-40"><a href="#Scope-40"><span class="linenos"> 40</span></a><span class="sd"> The inner query would have `["col1", "col2"]` for its `outer_column_list`</span> +</span><span id="Scope-41"><a href="#Scope-41"><span class="linenos"> 41</span></a><span class="sd"> parent (Scope): Parent scope</span> +</span><span id="Scope-42"><a href="#Scope-42"><span class="linenos"> 42</span></a><span class="sd"> scope_type (ScopeType): Type of this scope, relative to it's parent</span> +</span><span id="Scope-43"><a href="#Scope-43"><span class="linenos"> 43</span></a><span class="sd"> subquery_scopes (list[Scope]): List of all child scopes for subqueries</span> +</span><span id="Scope-44"><a href="#Scope-44"><span class="linenos"> 44</span></a><span class="sd"> cte_scopes (list[Scope]): List of all child scopes for CTEs</span> +</span><span id="Scope-45"><a href="#Scope-45"><span class="linenos"> 45</span></a><span class="sd"> derived_table_scopes (list[Scope]): List of all child scopes for derived_tables</span> +</span><span id="Scope-46"><a href="#Scope-46"><span class="linenos"> 46</span></a><span class="sd"> udtf_scopes (list[Scope]): List of all child scopes for user defined tabular functions</span> +</span><span id="Scope-47"><a href="#Scope-47"><span class="linenos"> 47</span></a><span class="sd"> table_scopes (list[Scope]): derived_table_scopes + udtf_scopes, in the order that they're defined</span> +</span><span id="Scope-48"><a href="#Scope-48"><span class="linenos"> 48</span></a><span class="sd"> union_scopes (list[Scope, Scope]): If this Scope is for a Union expression, this will be</span> +</span><span id="Scope-49"><a href="#Scope-49"><span class="linenos"> 49</span></a><span class="sd"> a list of the left and right child scopes.</span> +</span><span id="Scope-50"><a href="#Scope-50"><span class="linenos"> 50</span></a><span class="sd"> """</span> +</span><span id="Scope-51"><a href="#Scope-51"><span class="linenos"> 51</span></a> +</span><span id="Scope-52"><a href="#Scope-52"><span class="linenos"> 52</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="Scope-53"><a href="#Scope-53"><span class="linenos"> 53</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="Scope-54"><a href="#Scope-54"><span class="linenos"> 54</span></a> <span class="n">expression</span><span class="p">,</span> +</span><span id="Scope-55"><a href="#Scope-55"><span class="linenos"> 55</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope-56"><a href="#Scope-56"><span class="linenos"> 56</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope-57"><a href="#Scope-57"><span class="linenos"> 57</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope-58"><a href="#Scope-58"><span class="linenos"> 58</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> +</span><span id="Scope-59"><a href="#Scope-59"><span class="linenos"> 59</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope-60"><a href="#Scope-60"><span class="linenos"> 60</span></a> <span class="p">):</span> +</span><span id="Scope-61"><a href="#Scope-61"><span class="linenos"> 61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="Scope-62"><a href="#Scope-62"><span class="linenos"> 62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="Scope-63"><a href="#Scope-63"><span class="linenos"> 63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> +</span><span id="Scope-64"><a href="#Scope-64"><span class="linenos"> 64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="Scope-65"><a href="#Scope-65"><span class="linenos"> 65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="Scope-66"><a href="#Scope-66"><span class="linenos"> 66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> +</span><span id="Scope-67"><a href="#Scope-67"><span class="linenos"> 67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> +</span><span id="Scope-68"><a href="#Scope-68"><span class="linenos"> 68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-69"><a href="#Scope-69"><span class="linenos"> 69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-70"><a href="#Scope-70"><span class="linenos"> 70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-71"><a href="#Scope-71"><span class="linenos"> 71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-72"><a href="#Scope-72"><span class="linenos"> 72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-73"><a href="#Scope-73"><span class="linenos"> 73</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-74"><a href="#Scope-74"><span class="linenos"> 74</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-75"><a href="#Scope-75"><span class="linenos"> 75</span></a> +</span><span id="Scope-76"><a href="#Scope-76"><span class="linenos"> 76</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-77"><a href="#Scope-77"><span class="linenos"> 77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="Scope-78"><a href="#Scope-78"><span class="linenos"> 78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-79"><a href="#Scope-79"><span class="linenos"> 79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-80"><a href="#Scope-80"><span class="linenos"> 80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-81"><a href="#Scope-81"><span class="linenos"> 81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-82"><a href="#Scope-82"><span class="linenos"> 82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-83"><a href="#Scope-83"><span class="linenos"> 83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-84"><a href="#Scope-84"><span class="linenos"> 84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-85"><a href="#Scope-85"><span class="linenos"> 85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-86"><a href="#Scope-86"><span class="linenos"> 86</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-87"><a href="#Scope-87"><span class="linenos"> 87</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-88"><a href="#Scope-88"><span class="linenos"> 88</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope-89"><a href="#Scope-89"><span class="linenos"> 89</span></a> +</span><span id="Scope-90"><a href="#Scope-90"><span class="linenos"> 90</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> +</span><span id="Scope-91"><a href="#Scope-91"><span class="linenos"> 91</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> +</span><span id="Scope-92"><a href="#Scope-92"><span class="linenos"> 92</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> +</span><span id="Scope-93"><a href="#Scope-93"><span class="linenos"> 93</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> +</span><span id="Scope-94"><a href="#Scope-94"><span class="linenos"> 94</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> +</span><span id="Scope-95"><a href="#Scope-95"><span class="linenos"> 95</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> +</span><span id="Scope-96"><a href="#Scope-96"><span class="linenos"> 96</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> +</span><span id="Scope-97"><a href="#Scope-97"><span class="linenos"> 97</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="Scope-98"><a href="#Scope-98"><span class="linenos"> 98</span></a> <span class="p">)</span> +</span><span id="Scope-99"><a href="#Scope-99"><span class="linenos"> 99</span></a> +</span><span id="Scope-100"><a href="#Scope-100"><span class="linenos">100</span></a> <span class="k">def</span> <span class="nf">_collect</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-101"><a href="#Scope-101"><span class="linenos">101</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-102"><a href="#Scope-102"><span class="linenos">102</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-103"><a href="#Scope-103"><span class="linenos">103</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-104"><a href="#Scope-104"><span class="linenos">104</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-105"><a href="#Scope-105"><span class="linenos">105</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-106"><a href="#Scope-106"><span class="linenos">106</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-107"><a href="#Scope-107"><span class="linenos">107</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-108"><a href="#Scope-108"><span class="linenos">108</span></a> +</span><span id="Scope-109"><a href="#Scope-109"><span class="linenos">109</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="Scope-110"><a href="#Scope-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">:</span> +</span><span id="Scope-111"><a href="#Scope-111"><span class="linenos">111</span></a> <span class="k">continue</span> +</span><span id="Scope-112"><a href="#Scope-112"><span class="linenos">112</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Star</span><span class="p">):</span> +</span><span id="Scope-113"><a href="#Scope-113"><span class="linenos">113</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-114"><a href="#Scope-114"><span class="linenos">114</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> +</span><span id="Scope-115"><a href="#Scope-115"><span class="linenos">115</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-116"><a href="#Scope-116"><span class="linenos">116</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">JoinHint</span><span class="p">):</span> +</span><span id="Scope-117"><a href="#Scope-117"><span class="linenos">117</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-118"><a href="#Scope-118"><span class="linenos">118</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> +</span><span id="Scope-119"><a href="#Scope-119"><span class="linenos">119</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-120"><a href="#Scope-120"><span class="linenos">120</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">):</span> +</span><span id="Scope-121"><a href="#Scope-121"><span class="linenos">121</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-122"><a href="#Scope-122"><span class="linenos">122</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)):</span> +</span><span id="Scope-123"><a href="#Scope-123"><span class="linenos">123</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="Scope-124"><a href="#Scope-124"><span class="linenos">124</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">):</span> +</span><span id="Scope-125"><a href="#Scope-125"><span class="linenos">125</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> </span><span id="Scope-126"><a href="#Scope-126"><span class="linenos">126</span></a> -</span><span id="Scope-127"><a href="#Scope-127"><span class="linenos">127</span></a> <span class="k">def</span> <span class="nf">_ensure_collected</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-128"><a href="#Scope-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span><span class="p">:</span> -</span><span id="Scope-129"><a href="#Scope-129"><span class="linenos">129</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collect</span><span class="p">()</span> -</span><span id="Scope-130"><a href="#Scope-130"><span class="linenos">130</span></a> -</span><span id="Scope-131"><a href="#Scope-131"><span class="linenos">131</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope-132"><a href="#Scope-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> -</span><span id="Scope-133"><a href="#Scope-133"><span class="linenos">133</span></a> -</span><span id="Scope-134"><a href="#Scope-134"><span class="linenos">134</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope-135"><a href="#Scope-135"><span class="linenos">135</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-136"><a href="#Scope-136"><span class="linenos">136</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> -</span><span id="Scope-137"><a href="#Scope-137"><span class="linenos">137</span></a> -</span><span id="Scope-138"><a href="#Scope-138"><span class="linenos">138</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope-127"><a href="#Scope-127"><span class="linenos">127</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="Scope-128"><a href="#Scope-128"><span class="linenos">128</span></a> +</span><span id="Scope-129"><a href="#Scope-129"><span class="linenos">129</span></a> <span class="k">def</span> <span class="nf">_ensure_collected</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-130"><a href="#Scope-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span><span class="p">:</span> +</span><span id="Scope-131"><a href="#Scope-131"><span class="linenos">131</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collect</span><span class="p">()</span> +</span><span id="Scope-132"><a href="#Scope-132"><span class="linenos">132</span></a> +</span><span id="Scope-133"><a href="#Scope-133"><span class="linenos">133</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope-134"><a href="#Scope-134"><span class="linenos">134</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> +</span><span id="Scope-135"><a href="#Scope-135"><span class="linenos">135</span></a> +</span><span id="Scope-136"><a href="#Scope-136"><span class="linenos">136</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope-137"><a href="#Scope-137"><span class="linenos">137</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-138"><a href="#Scope-138"><span class="linenos">138</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> </span><span id="Scope-139"><a href="#Scope-139"><span class="linenos">139</span></a> -</span><span id="Scope-140"><a href="#Scope-140"><span class="linenos">140</span></a><span class="sd"> Args:</span> -</span><span id="Scope-141"><a href="#Scope-141"><span class="linenos">141</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="Scope-142"><a href="#Scope-142"><span class="linenos">142</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="Scope-143"><a href="#Scope-143"><span class="linenos">143</span></a> -</span><span id="Scope-144"><a href="#Scope-144"><span class="linenos">144</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-145"><a href="#Scope-145"><span class="linenos">145</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> -</span><span id="Scope-146"><a href="#Scope-146"><span class="linenos">146</span></a><span class="sd"> the criteria was found.</span> -</span><span id="Scope-147"><a href="#Scope-147"><span class="linenos">147</span></a><span class="sd"> """</span> -</span><span id="Scope-148"><a href="#Scope-148"><span class="linenos">148</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="Scope-149"><a href="#Scope-149"><span class="linenos">149</span></a> -</span><span id="Scope-150"><a href="#Scope-150"><span class="linenos">150</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope-151"><a href="#Scope-151"><span class="linenos">151</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-152"><a href="#Scope-152"><span class="linenos">152</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> -</span><span id="Scope-153"><a href="#Scope-153"><span class="linenos">153</span></a><span class="sd"> match at least one of the specified expression types.</span> -</span><span id="Scope-154"><a href="#Scope-154"><span class="linenos">154</span></a> -</span><span id="Scope-155"><a href="#Scope-155"><span class="linenos">155</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope-140"><a href="#Scope-140"><span class="linenos">140</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope-141"><a href="#Scope-141"><span class="linenos">141</span></a> +</span><span id="Scope-142"><a href="#Scope-142"><span class="linenos">142</span></a><span class="sd"> Args:</span> +</span><span id="Scope-143"><a href="#Scope-143"><span class="linenos">143</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="Scope-144"><a href="#Scope-144"><span class="linenos">144</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="Scope-145"><a href="#Scope-145"><span class="linenos">145</span></a> +</span><span id="Scope-146"><a href="#Scope-146"><span class="linenos">146</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-147"><a href="#Scope-147"><span class="linenos">147</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> +</span><span id="Scope-148"><a href="#Scope-148"><span class="linenos">148</span></a><span class="sd"> the criteria was found.</span> +</span><span id="Scope-149"><a href="#Scope-149"><span class="linenos">149</span></a><span class="sd"> """</span> +</span><span id="Scope-150"><a href="#Scope-150"><span class="linenos">150</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Scope-151"><a href="#Scope-151"><span class="linenos">151</span></a> +</span><span id="Scope-152"><a href="#Scope-152"><span class="linenos">152</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope-153"><a href="#Scope-153"><span class="linenos">153</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-154"><a href="#Scope-154"><span class="linenos">154</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> +</span><span id="Scope-155"><a href="#Scope-155"><span class="linenos">155</span></a><span class="sd"> match at least one of the specified expression types.</span> </span><span id="Scope-156"><a href="#Scope-156"><span class="linenos">156</span></a> -</span><span id="Scope-157"><a href="#Scope-157"><span class="linenos">157</span></a><span class="sd"> Args:</span> -</span><span id="Scope-158"><a href="#Scope-158"><span class="linenos">158</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="Scope-159"><a href="#Scope-159"><span class="linenos">159</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="Scope-160"><a href="#Scope-160"><span class="linenos">160</span></a> -</span><span id="Scope-161"><a href="#Scope-161"><span class="linenos">161</span></a><span class="sd"> Yields:</span> -</span><span id="Scope-162"><a href="#Scope-162"><span class="linenos">162</span></a><span class="sd"> exp.Expression: nodes</span> -</span><span id="Scope-163"><a href="#Scope-163"><span class="linenos">163</span></a><span class="sd"> """</span> -</span><span id="Scope-164"><a href="#Scope-164"><span class="linenos">164</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> -</span><span id="Scope-165"><a href="#Scope-165"><span class="linenos">165</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> -</span><span id="Scope-166"><a href="#Scope-166"><span class="linenos">166</span></a> <span class="k">yield</span> <span class="n">expression</span> -</span><span id="Scope-167"><a href="#Scope-167"><span class="linenos">167</span></a> -</span><span id="Scope-168"><a href="#Scope-168"><span class="linenos">168</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> -</span><span id="Scope-169"><a href="#Scope-169"><span class="linenos">169</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-170"><a href="#Scope-170"><span class="linenos">170</span></a><span class="sd"> Replace `old` with `new`.</span> -</span><span id="Scope-171"><a href="#Scope-171"><span class="linenos">171</span></a> -</span><span id="Scope-172"><a href="#Scope-172"><span class="linenos">172</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> +</span><span id="Scope-157"><a href="#Scope-157"><span class="linenos">157</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope-158"><a href="#Scope-158"><span class="linenos">158</span></a> +</span><span id="Scope-159"><a href="#Scope-159"><span class="linenos">159</span></a><span class="sd"> Args:</span> +</span><span id="Scope-160"><a href="#Scope-160"><span class="linenos">160</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="Scope-161"><a href="#Scope-161"><span class="linenos">161</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="Scope-162"><a href="#Scope-162"><span class="linenos">162</span></a> +</span><span id="Scope-163"><a href="#Scope-163"><span class="linenos">163</span></a><span class="sd"> Yields:</span> +</span><span id="Scope-164"><a href="#Scope-164"><span class="linenos">164</span></a><span class="sd"> exp.Expression: nodes</span> +</span><span id="Scope-165"><a href="#Scope-165"><span class="linenos">165</span></a><span class="sd"> """</span> +</span><span id="Scope-166"><a href="#Scope-166"><span class="linenos">166</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> +</span><span id="Scope-167"><a href="#Scope-167"><span class="linenos">167</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> +</span><span id="Scope-168"><a href="#Scope-168"><span class="linenos">168</span></a> <span class="k">yield</span> <span class="n">expression</span> +</span><span id="Scope-169"><a href="#Scope-169"><span class="linenos">169</span></a> +</span><span id="Scope-170"><a href="#Scope-170"><span class="linenos">170</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> +</span><span id="Scope-171"><a href="#Scope-171"><span class="linenos">171</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-172"><a href="#Scope-172"><span class="linenos">172</span></a><span class="sd"> Replace `old` with `new`.</span> </span><span id="Scope-173"><a href="#Scope-173"><span class="linenos">173</span></a> -</span><span id="Scope-174"><a href="#Scope-174"><span class="linenos">174</span></a><span class="sd"> Args:</span> -</span><span id="Scope-175"><a href="#Scope-175"><span class="linenos">175</span></a><span class="sd"> old (exp.Expression): old node</span> -</span><span id="Scope-176"><a href="#Scope-176"><span class="linenos">176</span></a><span class="sd"> new (exp.Expression): new node</span> -</span><span id="Scope-177"><a href="#Scope-177"><span class="linenos">177</span></a><span class="sd"> """</span> -</span><span id="Scope-178"><a href="#Scope-178"><span class="linenos">178</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> -</span><span id="Scope-179"><a href="#Scope-179"><span class="linenos">179</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="Scope-180"><a href="#Scope-180"><span class="linenos">180</span></a> -</span><span id="Scope-181"><a href="#Scope-181"><span class="linenos">181</span></a> <span class="nd">@property</span> -</span><span id="Scope-182"><a href="#Scope-182"><span class="linenos">182</span></a> <span class="k">def</span> <span class="nf">tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-183"><a href="#Scope-183"><span class="linenos">183</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-184"><a href="#Scope-184"><span class="linenos">184</span></a><span class="sd"> List of tables in this scope.</span> -</span><span id="Scope-185"><a href="#Scope-185"><span class="linenos">185</span></a> -</span><span id="Scope-186"><a href="#Scope-186"><span class="linenos">186</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-187"><a href="#Scope-187"><span class="linenos">187</span></a><span class="sd"> list[exp.Table]: tables</span> -</span><span id="Scope-188"><a href="#Scope-188"><span class="linenos">188</span></a><span class="sd"> """</span> -</span><span id="Scope-189"><a href="#Scope-189"><span class="linenos">189</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-190"><a href="#Scope-190"><span class="linenos">190</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> -</span><span id="Scope-191"><a href="#Scope-191"><span class="linenos">191</span></a> -</span><span id="Scope-192"><a href="#Scope-192"><span class="linenos">192</span></a> <span class="nd">@property</span> -</span><span id="Scope-193"><a href="#Scope-193"><span class="linenos">193</span></a> <span class="k">def</span> <span class="nf">ctes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-194"><a href="#Scope-194"><span class="linenos">194</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-195"><a href="#Scope-195"><span class="linenos">195</span></a><span class="sd"> List of CTEs in this scope.</span> -</span><span id="Scope-196"><a href="#Scope-196"><span class="linenos">196</span></a> -</span><span id="Scope-197"><a href="#Scope-197"><span class="linenos">197</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-198"><a href="#Scope-198"><span class="linenos">198</span></a><span class="sd"> list[exp.CTE]: ctes</span> -</span><span id="Scope-199"><a href="#Scope-199"><span class="linenos">199</span></a><span class="sd"> """</span> -</span><span id="Scope-200"><a href="#Scope-200"><span class="linenos">200</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-201"><a href="#Scope-201"><span class="linenos">201</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> -</span><span id="Scope-202"><a href="#Scope-202"><span class="linenos">202</span></a> -</span><span id="Scope-203"><a href="#Scope-203"><span class="linenos">203</span></a> <span class="nd">@property</span> -</span><span id="Scope-204"><a href="#Scope-204"><span class="linenos">204</span></a> <span class="k">def</span> <span class="nf">derived_tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-205"><a href="#Scope-205"><span class="linenos">205</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-206"><a href="#Scope-206"><span class="linenos">206</span></a><span class="sd"> List of derived tables in this scope.</span> -</span><span id="Scope-207"><a href="#Scope-207"><span class="linenos">207</span></a> -</span><span id="Scope-208"><a href="#Scope-208"><span class="linenos">208</span></a><span class="sd"> For example:</span> -</span><span id="Scope-209"><a href="#Scope-209"><span class="linenos">209</span></a><span class="sd"> SELECT * FROM (SELECT ...) <- that's a derived table</span> -</span><span id="Scope-210"><a href="#Scope-210"><span class="linenos">210</span></a> -</span><span id="Scope-211"><a href="#Scope-211"><span class="linenos">211</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-212"><a href="#Scope-212"><span class="linenos">212</span></a><span class="sd"> list[exp.Subquery]: derived tables</span> -</span><span id="Scope-213"><a href="#Scope-213"><span class="linenos">213</span></a><span class="sd"> """</span> -</span><span id="Scope-214"><a href="#Scope-214"><span class="linenos">214</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-215"><a href="#Scope-215"><span class="linenos">215</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> -</span><span id="Scope-216"><a href="#Scope-216"><span class="linenos">216</span></a> -</span><span id="Scope-217"><a href="#Scope-217"><span class="linenos">217</span></a> <span class="nd">@property</span> -</span><span id="Scope-218"><a href="#Scope-218"><span class="linenos">218</span></a> <span class="k">def</span> <span class="nf">udtfs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-219"><a href="#Scope-219"><span class="linenos">219</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-220"><a href="#Scope-220"><span class="linenos">220</span></a><span class="sd"> List of "User Defined Tabular Functions" in this scope.</span> -</span><span id="Scope-221"><a href="#Scope-221"><span class="linenos">221</span></a> -</span><span id="Scope-222"><a href="#Scope-222"><span class="linenos">222</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-223"><a href="#Scope-223"><span class="linenos">223</span></a><span class="sd"> list[exp.UDTF]: UDTFs</span> -</span><span id="Scope-224"><a href="#Scope-224"><span class="linenos">224</span></a><span class="sd"> """</span> -</span><span id="Scope-225"><a href="#Scope-225"><span class="linenos">225</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-226"><a href="#Scope-226"><span class="linenos">226</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> -</span><span id="Scope-227"><a href="#Scope-227"><span class="linenos">227</span></a> -</span><span id="Scope-228"><a href="#Scope-228"><span class="linenos">228</span></a> <span class="nd">@property</span> -</span><span id="Scope-229"><a href="#Scope-229"><span class="linenos">229</span></a> <span class="k">def</span> <span class="nf">subqueries</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-230"><a href="#Scope-230"><span class="linenos">230</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-231"><a href="#Scope-231"><span class="linenos">231</span></a><span class="sd"> List of subqueries in this scope.</span> -</span><span id="Scope-232"><a href="#Scope-232"><span class="linenos">232</span></a> -</span><span id="Scope-233"><a href="#Scope-233"><span class="linenos">233</span></a><span class="sd"> For example:</span> -</span><span id="Scope-234"><a href="#Scope-234"><span class="linenos">234</span></a><span class="sd"> SELECT * FROM x WHERE a IN (SELECT ...) <- that's a subquery</span> -</span><span id="Scope-235"><a href="#Scope-235"><span class="linenos">235</span></a> -</span><span id="Scope-236"><a href="#Scope-236"><span class="linenos">236</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-237"><a href="#Scope-237"><span class="linenos">237</span></a><span class="sd"> list[exp.Subqueryable]: subqueries</span> -</span><span id="Scope-238"><a href="#Scope-238"><span class="linenos">238</span></a><span class="sd"> """</span> -</span><span id="Scope-239"><a href="#Scope-239"><span class="linenos">239</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-240"><a href="#Scope-240"><span class="linenos">240</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> -</span><span id="Scope-241"><a href="#Scope-241"><span class="linenos">241</span></a> -</span><span id="Scope-242"><a href="#Scope-242"><span class="linenos">242</span></a> <span class="nd">@property</span> -</span><span id="Scope-243"><a href="#Scope-243"><span class="linenos">243</span></a> <span class="k">def</span> <span class="nf">columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-244"><a href="#Scope-244"><span class="linenos">244</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-245"><a href="#Scope-245"><span class="linenos">245</span></a><span class="sd"> List of columns in this scope.</span> -</span><span id="Scope-246"><a href="#Scope-246"><span class="linenos">246</span></a> -</span><span id="Scope-247"><a href="#Scope-247"><span class="linenos">247</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-248"><a href="#Scope-248"><span class="linenos">248</span></a><span class="sd"> list[exp.Column]: Column instances in this scope, plus any</span> -</span><span id="Scope-249"><a href="#Scope-249"><span class="linenos">249</span></a><span class="sd"> Columns that reference this scope from correlated subqueries.</span> -</span><span id="Scope-250"><a href="#Scope-250"><span class="linenos">250</span></a><span class="sd"> """</span> -</span><span id="Scope-251"><a href="#Scope-251"><span class="linenos">251</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Scope-252"><a href="#Scope-252"><span class="linenos">252</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> -</span><span id="Scope-253"><a href="#Scope-253"><span class="linenos">253</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> -</span><span id="Scope-254"><a href="#Scope-254"><span class="linenos">254</span></a> -</span><span id="Scope-255"><a href="#Scope-255"><span class="linenos">255</span></a> <span class="n">external_columns</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="Scope-256"><a href="#Scope-256"><span class="linenos">256</span></a> <span class="n">column</span> -</span><span id="Scope-257"><a href="#Scope-257"><span class="linenos">257</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span><span class="p">)</span> -</span><span id="Scope-258"><a href="#Scope-258"><span class="linenos">258</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> -</span><span id="Scope-259"><a href="#Scope-259"><span class="linenos">259</span></a> <span class="p">]</span> -</span><span id="Scope-260"><a href="#Scope-260"><span class="linenos">260</span></a> -</span><span id="Scope-261"><a href="#Scope-261"><span class="linenos">261</span></a> <span class="n">named_selects</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="Scope-174"><a href="#Scope-174"><span class="linenos">174</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> +</span><span id="Scope-175"><a href="#Scope-175"><span class="linenos">175</span></a> +</span><span id="Scope-176"><a href="#Scope-176"><span class="linenos">176</span></a><span class="sd"> Args:</span> +</span><span id="Scope-177"><a href="#Scope-177"><span class="linenos">177</span></a><span class="sd"> old (exp.Expression): old node</span> +</span><span id="Scope-178"><a href="#Scope-178"><span class="linenos">178</span></a><span class="sd"> new (exp.Expression): new node</span> +</span><span id="Scope-179"><a href="#Scope-179"><span class="linenos">179</span></a><span class="sd"> """</span> +</span><span id="Scope-180"><a href="#Scope-180"><span class="linenos">180</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> +</span><span id="Scope-181"><a href="#Scope-181"><span class="linenos">181</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-182"><a href="#Scope-182"><span class="linenos">182</span></a> +</span><span id="Scope-183"><a href="#Scope-183"><span class="linenos">183</span></a> <span class="nd">@property</span> +</span><span id="Scope-184"><a href="#Scope-184"><span class="linenos">184</span></a> <span class="k">def</span> <span class="nf">tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-185"><a href="#Scope-185"><span class="linenos">185</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-186"><a href="#Scope-186"><span class="linenos">186</span></a><span class="sd"> List of tables in this scope.</span> +</span><span id="Scope-187"><a href="#Scope-187"><span class="linenos">187</span></a> +</span><span id="Scope-188"><a href="#Scope-188"><span class="linenos">188</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-189"><a href="#Scope-189"><span class="linenos">189</span></a><span class="sd"> list[exp.Table]: tables</span> +</span><span id="Scope-190"><a href="#Scope-190"><span class="linenos">190</span></a><span class="sd"> """</span> +</span><span id="Scope-191"><a href="#Scope-191"><span class="linenos">191</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-192"><a href="#Scope-192"><span class="linenos">192</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> +</span><span id="Scope-193"><a href="#Scope-193"><span class="linenos">193</span></a> +</span><span id="Scope-194"><a href="#Scope-194"><span class="linenos">194</span></a> <span class="nd">@property</span> +</span><span id="Scope-195"><a href="#Scope-195"><span class="linenos">195</span></a> <span class="k">def</span> <span class="nf">ctes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-196"><a href="#Scope-196"><span class="linenos">196</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-197"><a href="#Scope-197"><span class="linenos">197</span></a><span class="sd"> List of CTEs in this scope.</span> +</span><span id="Scope-198"><a href="#Scope-198"><span class="linenos">198</span></a> +</span><span id="Scope-199"><a href="#Scope-199"><span class="linenos">199</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-200"><a href="#Scope-200"><span class="linenos">200</span></a><span class="sd"> list[exp.CTE]: ctes</span> +</span><span id="Scope-201"><a href="#Scope-201"><span class="linenos">201</span></a><span class="sd"> """</span> +</span><span id="Scope-202"><a href="#Scope-202"><span class="linenos">202</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-203"><a href="#Scope-203"><span class="linenos">203</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> +</span><span id="Scope-204"><a href="#Scope-204"><span class="linenos">204</span></a> +</span><span id="Scope-205"><a href="#Scope-205"><span class="linenos">205</span></a> <span class="nd">@property</span> +</span><span id="Scope-206"><a href="#Scope-206"><span class="linenos">206</span></a> <span class="k">def</span> <span class="nf">derived_tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-207"><a href="#Scope-207"><span class="linenos">207</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-208"><a href="#Scope-208"><span class="linenos">208</span></a><span class="sd"> List of derived tables in this scope.</span> +</span><span id="Scope-209"><a href="#Scope-209"><span class="linenos">209</span></a> +</span><span id="Scope-210"><a href="#Scope-210"><span class="linenos">210</span></a><span class="sd"> For example:</span> +</span><span id="Scope-211"><a href="#Scope-211"><span class="linenos">211</span></a><span class="sd"> SELECT * FROM (SELECT ...) <- that's a derived table</span> +</span><span id="Scope-212"><a href="#Scope-212"><span class="linenos">212</span></a> +</span><span id="Scope-213"><a href="#Scope-213"><span class="linenos">213</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-214"><a href="#Scope-214"><span class="linenos">214</span></a><span class="sd"> list[exp.Subquery]: derived tables</span> +</span><span id="Scope-215"><a href="#Scope-215"><span class="linenos">215</span></a><span class="sd"> """</span> +</span><span id="Scope-216"><a href="#Scope-216"><span class="linenos">216</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-217"><a href="#Scope-217"><span class="linenos">217</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> +</span><span id="Scope-218"><a href="#Scope-218"><span class="linenos">218</span></a> +</span><span id="Scope-219"><a href="#Scope-219"><span class="linenos">219</span></a> <span class="nd">@property</span> +</span><span id="Scope-220"><a href="#Scope-220"><span class="linenos">220</span></a> <span class="k">def</span> <span class="nf">udtfs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-221"><a href="#Scope-221"><span class="linenos">221</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-222"><a href="#Scope-222"><span class="linenos">222</span></a><span class="sd"> List of "User Defined Tabular Functions" in this scope.</span> +</span><span id="Scope-223"><a href="#Scope-223"><span class="linenos">223</span></a> +</span><span id="Scope-224"><a href="#Scope-224"><span class="linenos">224</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-225"><a href="#Scope-225"><span class="linenos">225</span></a><span class="sd"> list[exp.UDTF]: UDTFs</span> +</span><span id="Scope-226"><a href="#Scope-226"><span class="linenos">226</span></a><span class="sd"> """</span> +</span><span id="Scope-227"><a href="#Scope-227"><span class="linenos">227</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-228"><a href="#Scope-228"><span class="linenos">228</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> +</span><span id="Scope-229"><a href="#Scope-229"><span class="linenos">229</span></a> +</span><span id="Scope-230"><a href="#Scope-230"><span class="linenos">230</span></a> <span class="nd">@property</span> +</span><span id="Scope-231"><a href="#Scope-231"><span class="linenos">231</span></a> <span class="k">def</span> <span class="nf">subqueries</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-232"><a href="#Scope-232"><span class="linenos">232</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-233"><a href="#Scope-233"><span class="linenos">233</span></a><span class="sd"> List of subqueries in this scope.</span> +</span><span id="Scope-234"><a href="#Scope-234"><span class="linenos">234</span></a> +</span><span id="Scope-235"><a href="#Scope-235"><span class="linenos">235</span></a><span class="sd"> For example:</span> +</span><span id="Scope-236"><a href="#Scope-236"><span class="linenos">236</span></a><span class="sd"> SELECT * FROM x WHERE a IN (SELECT ...) <- that's a subquery</span> +</span><span id="Scope-237"><a href="#Scope-237"><span class="linenos">237</span></a> +</span><span id="Scope-238"><a href="#Scope-238"><span class="linenos">238</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-239"><a href="#Scope-239"><span class="linenos">239</span></a><span class="sd"> list[exp.Subqueryable]: subqueries</span> +</span><span id="Scope-240"><a href="#Scope-240"><span class="linenos">240</span></a><span class="sd"> """</span> +</span><span id="Scope-241"><a href="#Scope-241"><span class="linenos">241</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-242"><a href="#Scope-242"><span class="linenos">242</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> +</span><span id="Scope-243"><a href="#Scope-243"><span class="linenos">243</span></a> +</span><span id="Scope-244"><a href="#Scope-244"><span class="linenos">244</span></a> <span class="nd">@property</span> +</span><span id="Scope-245"><a href="#Scope-245"><span class="linenos">245</span></a> <span class="k">def</span> <span class="nf">columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-246"><a href="#Scope-246"><span class="linenos">246</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-247"><a href="#Scope-247"><span class="linenos">247</span></a><span class="sd"> List of columns in this scope.</span> +</span><span id="Scope-248"><a href="#Scope-248"><span class="linenos">248</span></a> +</span><span id="Scope-249"><a href="#Scope-249"><span class="linenos">249</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-250"><a href="#Scope-250"><span class="linenos">250</span></a><span class="sd"> list[exp.Column]: Column instances in this scope, plus any</span> +</span><span id="Scope-251"><a href="#Scope-251"><span class="linenos">251</span></a><span class="sd"> Columns that reference this scope from correlated subqueries.</span> +</span><span id="Scope-252"><a href="#Scope-252"><span class="linenos">252</span></a><span class="sd"> """</span> +</span><span id="Scope-253"><a href="#Scope-253"><span class="linenos">253</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Scope-254"><a href="#Scope-254"><span class="linenos">254</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ensure_collected</span><span class="p">()</span> +</span><span id="Scope-255"><a href="#Scope-255"><span class="linenos">255</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> +</span><span id="Scope-256"><a href="#Scope-256"><span class="linenos">256</span></a> +</span><span id="Scope-257"><a href="#Scope-257"><span class="linenos">257</span></a> <span class="n">external_columns</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="Scope-258"><a href="#Scope-258"><span class="linenos">258</span></a> <span class="n">column</span> +</span><span id="Scope-259"><a href="#Scope-259"><span class="linenos">259</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span><span class="p">)</span> +</span><span id="Scope-260"><a href="#Scope-260"><span class="linenos">260</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span> +</span><span id="Scope-261"><a href="#Scope-261"><span class="linenos">261</span></a> <span class="p">]</span> </span><span id="Scope-262"><a href="#Scope-262"><span class="linenos">262</span></a> -</span><span id="Scope-263"><a href="#Scope-263"><span class="linenos">263</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-264"><a href="#Scope-264"><span class="linenos">264</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> <span class="o">+</span> <span class="n">external_columns</span><span class="p">:</span> -</span><span id="Scope-265"><a href="#Scope-265"><span class="linenos">265</span></a> <span class="n">ancestor</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">)</span> -</span><span id="Scope-266"><a href="#Scope-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="Scope-267"><a href="#Scope-267"><span class="linenos">267</span></a> <span class="ow">not</span> <span class="n">ancestor</span> -</span><span id="Scope-268"><a href="#Scope-268"><span class="linenos">268</span></a> <span class="c1"># Window functions can have an ORDER BY clause</span> -</span><span id="Scope-269"><a href="#Scope-269"><span class="linenos">269</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="Scope-270"><a href="#Scope-270"><span class="linenos">270</span></a> <span class="ow">or</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> -</span><span id="Scope-271"><a href="#Scope-271"><span class="linenos">271</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">named_selects</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">))</span> -</span><span id="Scope-272"><a href="#Scope-272"><span class="linenos">272</span></a> <span class="p">):</span> -</span><span id="Scope-273"><a href="#Scope-273"><span class="linenos">273</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="Scope-274"><a href="#Scope-274"><span class="linenos">274</span></a> -</span><span id="Scope-275"><a href="#Scope-275"><span class="linenos">275</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> -</span><span id="Scope-276"><a href="#Scope-276"><span class="linenos">276</span></a> -</span><span id="Scope-277"><a href="#Scope-277"><span class="linenos">277</span></a> <span class="nd">@property</span> -</span><span id="Scope-278"><a href="#Scope-278"><span class="linenos">278</span></a> <span class="k">def</span> <span class="nf">selected_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-279"><a href="#Scope-279"><span class="linenos">279</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-280"><a href="#Scope-280"><span class="linenos">280</span></a><span class="sd"> Mapping of nodes and sources that are actually selected from in this scope.</span> -</span><span id="Scope-281"><a href="#Scope-281"><span class="linenos">281</span></a> -</span><span id="Scope-282"><a href="#Scope-282"><span class="linenos">282</span></a><span class="sd"> That is, all tables in a schema are selectable at any point. But a</span> -</span><span id="Scope-283"><a href="#Scope-283"><span class="linenos">283</span></a><span class="sd"> table only becomes a selected source if it's included in a FROM or JOIN clause.</span> -</span><span id="Scope-284"><a href="#Scope-284"><span class="linenos">284</span></a> -</span><span id="Scope-285"><a href="#Scope-285"><span class="linenos">285</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-286"><a href="#Scope-286"><span class="linenos">286</span></a><span class="sd"> dict[str, (exp.Table|exp.Select, exp.Table|Scope)]: selected sources and nodes</span> -</span><span id="Scope-287"><a href="#Scope-287"><span class="linenos">287</span></a><span class="sd"> """</span> -</span><span id="Scope-288"><a href="#Scope-288"><span class="linenos">288</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Scope-289"><a href="#Scope-289"><span class="linenos">289</span></a> <span class="n">referenced_names</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope-290"><a href="#Scope-290"><span class="linenos">290</span></a> -</span><span id="Scope-291"><a href="#Scope-291"><span class="linenos">291</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span><span class="p">:</span> -</span><span id="Scope-292"><a href="#Scope-292"><span class="linenos">292</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="p">))</span> -</span><span id="Scope-293"><a href="#Scope-293"><span class="linenos">293</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtfs</span><span class="p">):</span> -</span><span id="Scope-294"><a href="#Scope-294"><span class="linenos">294</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()))</span> -</span><span id="Scope-295"><a href="#Scope-295"><span class="linenos">295</span></a> <span class="n">result</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="Scope-296"><a href="#Scope-296"><span class="linenos">296</span></a> -</span><span id="Scope-297"><a href="#Scope-297"><span class="linenos">297</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">referenced_names</span><span class="p">:</span> -</span><span id="Scope-298"><a href="#Scope-298"><span class="linenos">298</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">result</span><span class="p">:</span> -</span><span id="Scope-299"><a href="#Scope-299"><span class="linenos">299</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Alias already used: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="Scope-300"><a href="#Scope-300"><span class="linenos">300</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> -</span><span id="Scope-301"><a href="#Scope-301"><span class="linenos">301</span></a> <span class="n">result</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> -</span><span id="Scope-302"><a href="#Scope-302"><span class="linenos">302</span></a> -</span><span id="Scope-303"><a href="#Scope-303"><span class="linenos">303</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="n">result</span> -</span><span id="Scope-304"><a href="#Scope-304"><span class="linenos">304</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> -</span><span id="Scope-305"><a href="#Scope-305"><span class="linenos">305</span></a> -</span><span id="Scope-306"><a href="#Scope-306"><span class="linenos">306</span></a> <span class="nd">@property</span> -</span><span id="Scope-307"><a href="#Scope-307"><span class="linenos">307</span></a> <span class="k">def</span> <span class="nf">cte_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-308"><a href="#Scope-308"><span class="linenos">308</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-309"><a href="#Scope-309"><span class="linenos">309</span></a><span class="sd"> Sources that are CTEs.</span> -</span><span id="Scope-310"><a href="#Scope-310"><span class="linenos">310</span></a> -</span><span id="Scope-311"><a href="#Scope-311"><span class="linenos">311</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-312"><a href="#Scope-312"><span class="linenos">312</span></a><span class="sd"> dict[str, Scope]: Mapping of source alias to Scope</span> -</span><span id="Scope-313"><a href="#Scope-313"><span class="linenos">313</span></a><span class="sd"> """</span> -</span><span id="Scope-314"><a href="#Scope-314"><span class="linenos">314</span></a> <span class="k">return</span> <span class="p">{</span> -</span><span id="Scope-315"><a href="#Scope-315"><span class="linenos">315</span></a> <span class="n">alias</span><span class="p">:</span> <span class="n">scope</span> -</span><span id="Scope-316"><a href="#Scope-316"><span class="linenos">316</span></a> <span class="k">for</span> <span class="n">alias</span><span class="p">,</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> -</span><span id="Scope-317"><a href="#Scope-317"><span class="linenos">317</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span> -</span><span id="Scope-318"><a href="#Scope-318"><span class="linenos">318</span></a> <span class="p">}</span> -</span><span id="Scope-319"><a href="#Scope-319"><span class="linenos">319</span></a> -</span><span id="Scope-320"><a href="#Scope-320"><span class="linenos">320</span></a> <span class="nd">@property</span> -</span><span id="Scope-321"><a href="#Scope-321"><span class="linenos">321</span></a> <span class="k">def</span> <span class="nf">selects</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-322"><a href="#Scope-322"><span class="linenos">322</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-323"><a href="#Scope-323"><span class="linenos">323</span></a><span class="sd"> Select expressions of this scope.</span> -</span><span id="Scope-324"><a href="#Scope-324"><span class="linenos">324</span></a> -</span><span id="Scope-325"><a href="#Scope-325"><span class="linenos">325</span></a><span class="sd"> For example, for the following expression:</span> -</span><span id="Scope-326"><a href="#Scope-326"><span class="linenos">326</span></a><span class="sd"> SELECT 1 as a, 2 as b FROM x</span> -</span><span id="Scope-327"><a href="#Scope-327"><span class="linenos">327</span></a> -</span><span id="Scope-328"><a href="#Scope-328"><span class="linenos">328</span></a><span class="sd"> The outputs are the "1 as a" and "2 as b" expressions.</span> -</span><span id="Scope-329"><a href="#Scope-329"><span class="linenos">329</span></a> -</span><span id="Scope-330"><a href="#Scope-330"><span class="linenos">330</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-331"><a href="#Scope-331"><span class="linenos">331</span></a><span class="sd"> list[exp.Expression]: expressions</span> -</span><span id="Scope-332"><a href="#Scope-332"><span class="linenos">332</span></a><span class="sd"> """</span> -</span><span id="Scope-333"><a href="#Scope-333"><span class="linenos">333</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> -</span><span id="Scope-334"><a href="#Scope-334"><span class="linenos">334</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span><span class="o">.</span><span class="n">selects</span> -</span><span id="Scope-335"><a href="#Scope-335"><span class="linenos">335</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span> -</span><span id="Scope-336"><a href="#Scope-336"><span class="linenos">336</span></a> -</span><span id="Scope-337"><a href="#Scope-337"><span class="linenos">337</span></a> <span class="nd">@property</span> -</span><span id="Scope-338"><a href="#Scope-338"><span class="linenos">338</span></a> <span class="k">def</span> <span class="nf">external_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-339"><a href="#Scope-339"><span class="linenos">339</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-340"><a href="#Scope-340"><span class="linenos">340</span></a><span class="sd"> Columns that appear to reference sources in outer scopes.</span> -</span><span id="Scope-341"><a href="#Scope-341"><span class="linenos">341</span></a> -</span><span id="Scope-342"><a href="#Scope-342"><span class="linenos">342</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-343"><a href="#Scope-343"><span class="linenos">343</span></a><span class="sd"> list[exp.Column]: Column instances that don't reference</span> -</span><span id="Scope-344"><a href="#Scope-344"><span class="linenos">344</span></a><span class="sd"> sources in the current scope.</span> -</span><span id="Scope-345"><a href="#Scope-345"><span class="linenos">345</span></a><span class="sd"> """</span> -</span><span id="Scope-346"><a href="#Scope-346"><span class="linenos">346</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Scope-347"><a href="#Scope-347"><span class="linenos">347</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="Scope-348"><a href="#Scope-348"><span class="linenos">348</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected_sources</span> -</span><span id="Scope-349"><a href="#Scope-349"><span class="linenos">349</span></a> <span class="p">]</span> -</span><span id="Scope-350"><a href="#Scope-350"><span class="linenos">350</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> -</span><span id="Scope-351"><a href="#Scope-351"><span class="linenos">351</span></a> -</span><span id="Scope-352"><a href="#Scope-352"><span class="linenos">352</span></a> <span class="nd">@property</span> -</span><span id="Scope-353"><a href="#Scope-353"><span class="linenos">353</span></a> <span class="k">def</span> <span class="nf">unqualified_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-354"><a href="#Scope-354"><span class="linenos">354</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-355"><a href="#Scope-355"><span class="linenos">355</span></a><span class="sd"> Unqualified columns in the current scope.</span> -</span><span id="Scope-356"><a href="#Scope-356"><span class="linenos">356</span></a> -</span><span id="Scope-357"><a href="#Scope-357"><span class="linenos">357</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-358"><a href="#Scope-358"><span class="linenos">358</span></a><span class="sd"> list[exp.Column]: Unqualified columns</span> -</span><span id="Scope-359"><a href="#Scope-359"><span class="linenos">359</span></a><span class="sd"> """</span> -</span><span id="Scope-360"><a href="#Scope-360"><span class="linenos">360</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> -</span><span id="Scope-361"><a href="#Scope-361"><span class="linenos">361</span></a> -</span><span id="Scope-362"><a href="#Scope-362"><span class="linenos">362</span></a> <span class="nd">@property</span> -</span><span id="Scope-363"><a href="#Scope-363"><span class="linenos">363</span></a> <span class="k">def</span> <span class="nf">join_hints</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-364"><a href="#Scope-364"><span class="linenos">364</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-365"><a href="#Scope-365"><span class="linenos">365</span></a><span class="sd"> Hints that exist in the scope that reference tables</span> -</span><span id="Scope-366"><a href="#Scope-366"><span class="linenos">366</span></a> -</span><span id="Scope-367"><a href="#Scope-367"><span class="linenos">367</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-368"><a href="#Scope-368"><span class="linenos">368</span></a><span class="sd"> list[exp.JoinHint]: Join hints that are referenced within the scope</span> -</span><span id="Scope-369"><a href="#Scope-369"><span class="linenos">369</span></a><span class="sd"> """</span> -</span><span id="Scope-370"><a href="#Scope-370"><span class="linenos">370</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> -</span><span id="Scope-371"><a href="#Scope-371"><span class="linenos">371</span></a> <span class="k">return</span> <span class="p">[]</span> -</span><span id="Scope-372"><a href="#Scope-372"><span class="linenos">372</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> -</span><span id="Scope-373"><a href="#Scope-373"><span class="linenos">373</span></a> -</span><span id="Scope-374"><a href="#Scope-374"><span class="linenos">374</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> -</span><span id="Scope-375"><a href="#Scope-375"><span class="linenos">375</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-376"><a href="#Scope-376"><span class="linenos">376</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> +</span><span id="Scope-263"><a href="#Scope-263"><span class="linenos">263</span></a> <span class="n">named_selects</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">named_selects</span><span class="p">)</span> +</span><span id="Scope-264"><a href="#Scope-264"><span class="linenos">264</span></a> +</span><span id="Scope-265"><a href="#Scope-265"><span class="linenos">265</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-266"><a href="#Scope-266"><span class="linenos">266</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns</span> <span class="o">+</span> <span class="n">external_columns</span><span class="p">:</span> +</span><span id="Scope-267"><a href="#Scope-267"><span class="linenos">267</span></a> <span class="n">ancestor</span> <span class="o">=</span> <span class="n">column</span><span class="o">.</span><span class="n">find_ancestor</span><span class="p">(</span> +</span><span id="Scope-268"><a href="#Scope-268"><span class="linenos">268</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Qualify</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span> +</span><span id="Scope-269"><a href="#Scope-269"><span class="linenos">269</span></a> <span class="p">)</span> +</span><span id="Scope-270"><a href="#Scope-270"><span class="linenos">270</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="Scope-271"><a href="#Scope-271"><span class="linenos">271</span></a> <span class="ow">not</span> <span class="n">ancestor</span> +</span><span id="Scope-272"><a href="#Scope-272"><span class="linenos">272</span></a> <span class="ow">or</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> +</span><span id="Scope-273"><a href="#Scope-273"><span class="linenos">273</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> +</span><span id="Scope-274"><a href="#Scope-274"><span class="linenos">274</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">))</span> +</span><span id="Scope-275"><a href="#Scope-275"><span class="linenos">275</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">named_selects</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">ancestor</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Hint</span><span class="p">))</span> +</span><span id="Scope-276"><a href="#Scope-276"><span class="linenos">276</span></a> <span class="p">):</span> +</span><span id="Scope-277"><a href="#Scope-277"><span class="linenos">277</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="Scope-278"><a href="#Scope-278"><span class="linenos">278</span></a> +</span><span id="Scope-279"><a href="#Scope-279"><span class="linenos">279</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> +</span><span id="Scope-280"><a href="#Scope-280"><span class="linenos">280</span></a> +</span><span id="Scope-281"><a href="#Scope-281"><span class="linenos">281</span></a> <span class="nd">@property</span> +</span><span id="Scope-282"><a href="#Scope-282"><span class="linenos">282</span></a> <span class="k">def</span> <span class="nf">selected_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-283"><a href="#Scope-283"><span class="linenos">283</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-284"><a href="#Scope-284"><span class="linenos">284</span></a><span class="sd"> Mapping of nodes and sources that are actually selected from in this scope.</span> +</span><span id="Scope-285"><a href="#Scope-285"><span class="linenos">285</span></a> +</span><span id="Scope-286"><a href="#Scope-286"><span class="linenos">286</span></a><span class="sd"> That is, all tables in a schema are selectable at any point. But a</span> +</span><span id="Scope-287"><a href="#Scope-287"><span class="linenos">287</span></a><span class="sd"> table only becomes a selected source if it's included in a FROM or JOIN clause.</span> +</span><span id="Scope-288"><a href="#Scope-288"><span class="linenos">288</span></a> +</span><span id="Scope-289"><a href="#Scope-289"><span class="linenos">289</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-290"><a href="#Scope-290"><span class="linenos">290</span></a><span class="sd"> dict[str, (exp.Table|exp.Select, exp.Table|Scope)]: selected sources and nodes</span> +</span><span id="Scope-291"><a href="#Scope-291"><span class="linenos">291</span></a><span class="sd"> """</span> +</span><span id="Scope-292"><a href="#Scope-292"><span class="linenos">292</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Scope-293"><a href="#Scope-293"><span class="linenos">293</span></a> <span class="n">referenced_names</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope-294"><a href="#Scope-294"><span class="linenos">294</span></a> +</span><span id="Scope-295"><a href="#Scope-295"><span class="linenos">295</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span><span class="p">:</span> +</span><span id="Scope-296"><a href="#Scope-296"><span class="linenos">296</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="p">))</span> +</span><span id="Scope-297"><a href="#Scope-297"><span class="linenos">297</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">udtfs</span><span class="p">):</span> +</span><span id="Scope-298"><a href="#Scope-298"><span class="linenos">298</span></a> <span class="n">referenced_names</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">expression</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()))</span> +</span><span id="Scope-299"><a href="#Scope-299"><span class="linenos">299</span></a> <span class="n">result</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="Scope-300"><a href="#Scope-300"><span class="linenos">300</span></a> +</span><span id="Scope-301"><a href="#Scope-301"><span class="linenos">301</span></a> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">referenced_names</span><span class="p">:</span> +</span><span id="Scope-302"><a href="#Scope-302"><span class="linenos">302</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">result</span><span class="p">:</span> +</span><span id="Scope-303"><a href="#Scope-303"><span class="linenos">303</span></a> <span class="k">raise</span> <span class="n">OptimizeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Alias already used: </span><span class="si">{</span><span class="n">name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="Scope-304"><a href="#Scope-304"><span class="linenos">304</span></a> <span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">:</span> +</span><span id="Scope-305"><a href="#Scope-305"><span class="linenos">305</span></a> <span class="n">result</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> +</span><span id="Scope-306"><a href="#Scope-306"><span class="linenos">306</span></a> +</span><span id="Scope-307"><a href="#Scope-307"><span class="linenos">307</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="n">result</span> +</span><span id="Scope-308"><a href="#Scope-308"><span class="linenos">308</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> +</span><span id="Scope-309"><a href="#Scope-309"><span class="linenos">309</span></a> +</span><span id="Scope-310"><a href="#Scope-310"><span class="linenos">310</span></a> <span class="nd">@property</span> +</span><span id="Scope-311"><a href="#Scope-311"><span class="linenos">311</span></a> <span class="k">def</span> <span class="nf">cte_sources</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-312"><a href="#Scope-312"><span class="linenos">312</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-313"><a href="#Scope-313"><span class="linenos">313</span></a><span class="sd"> Sources that are CTEs.</span> +</span><span id="Scope-314"><a href="#Scope-314"><span class="linenos">314</span></a> +</span><span id="Scope-315"><a href="#Scope-315"><span class="linenos">315</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-316"><a href="#Scope-316"><span class="linenos">316</span></a><span class="sd"> dict[str, Scope]: Mapping of source alias to Scope</span> +</span><span id="Scope-317"><a href="#Scope-317"><span class="linenos">317</span></a><span class="sd"> """</span> +</span><span id="Scope-318"><a href="#Scope-318"><span class="linenos">318</span></a> <span class="k">return</span> <span class="p">{</span> +</span><span id="Scope-319"><a href="#Scope-319"><span class="linenos">319</span></a> <span class="n">alias</span><span class="p">:</span> <span class="n">scope</span> +</span><span id="Scope-320"><a href="#Scope-320"><span class="linenos">320</span></a> <span class="k">for</span> <span class="n">alias</span><span class="p">,</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> +</span><span id="Scope-321"><a href="#Scope-321"><span class="linenos">321</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span> +</span><span id="Scope-322"><a href="#Scope-322"><span class="linenos">322</span></a> <span class="p">}</span> +</span><span id="Scope-323"><a href="#Scope-323"><span class="linenos">323</span></a> +</span><span id="Scope-324"><a href="#Scope-324"><span class="linenos">324</span></a> <span class="nd">@property</span> +</span><span id="Scope-325"><a href="#Scope-325"><span class="linenos">325</span></a> <span class="k">def</span> <span class="nf">selects</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-326"><a href="#Scope-326"><span class="linenos">326</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-327"><a href="#Scope-327"><span class="linenos">327</span></a><span class="sd"> Select expressions of this scope.</span> +</span><span id="Scope-328"><a href="#Scope-328"><span class="linenos">328</span></a> +</span><span id="Scope-329"><a href="#Scope-329"><span class="linenos">329</span></a><span class="sd"> For example, for the following expression:</span> +</span><span id="Scope-330"><a href="#Scope-330"><span class="linenos">330</span></a><span class="sd"> SELECT 1 as a, 2 as b FROM x</span> +</span><span id="Scope-331"><a href="#Scope-331"><span class="linenos">331</span></a> +</span><span id="Scope-332"><a href="#Scope-332"><span class="linenos">332</span></a><span class="sd"> The outputs are the "1 as a" and "2 as b" expressions.</span> +</span><span id="Scope-333"><a href="#Scope-333"><span class="linenos">333</span></a> +</span><span id="Scope-334"><a href="#Scope-334"><span class="linenos">334</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-335"><a href="#Scope-335"><span class="linenos">335</span></a><span class="sd"> list[exp.Expression]: expressions</span> +</span><span id="Scope-336"><a href="#Scope-336"><span class="linenos">336</span></a><span class="sd"> """</span> +</span><span id="Scope-337"><a href="#Scope-337"><span class="linenos">337</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Union</span><span class="p">):</span> +</span><span id="Scope-338"><a href="#Scope-338"><span class="linenos">338</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span><span class="o">.</span><span class="n">selects</span> +</span><span id="Scope-339"><a href="#Scope-339"><span class="linenos">339</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">selects</span> +</span><span id="Scope-340"><a href="#Scope-340"><span class="linenos">340</span></a> +</span><span id="Scope-341"><a href="#Scope-341"><span class="linenos">341</span></a> <span class="nd">@property</span> +</span><span id="Scope-342"><a href="#Scope-342"><span class="linenos">342</span></a> <span class="k">def</span> <span class="nf">external_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-343"><a href="#Scope-343"><span class="linenos">343</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-344"><a href="#Scope-344"><span class="linenos">344</span></a><span class="sd"> Columns that appear to reference sources in outer scopes.</span> +</span><span id="Scope-345"><a href="#Scope-345"><span class="linenos">345</span></a> +</span><span id="Scope-346"><a href="#Scope-346"><span class="linenos">346</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-347"><a href="#Scope-347"><span class="linenos">347</span></a><span class="sd"> list[exp.Column]: Column instances that don't reference</span> +</span><span id="Scope-348"><a href="#Scope-348"><span class="linenos">348</span></a><span class="sd"> sources in the current scope.</span> +</span><span id="Scope-349"><a href="#Scope-349"><span class="linenos">349</span></a><span class="sd"> """</span> +</span><span id="Scope-350"><a href="#Scope-350"><span class="linenos">350</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Scope-351"><a href="#Scope-351"><span class="linenos">351</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="Scope-352"><a href="#Scope-352"><span class="linenos">352</span></a> <span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected_sources</span> +</span><span id="Scope-353"><a href="#Scope-353"><span class="linenos">353</span></a> <span class="p">]</span> +</span><span id="Scope-354"><a href="#Scope-354"><span class="linenos">354</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> +</span><span id="Scope-355"><a href="#Scope-355"><span class="linenos">355</span></a> +</span><span id="Scope-356"><a href="#Scope-356"><span class="linenos">356</span></a> <span class="nd">@property</span> +</span><span id="Scope-357"><a href="#Scope-357"><span class="linenos">357</span></a> <span class="k">def</span> <span class="nf">unqualified_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-358"><a href="#Scope-358"><span class="linenos">358</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-359"><a href="#Scope-359"><span class="linenos">359</span></a><span class="sd"> Unqualified columns in the current scope.</span> +</span><span id="Scope-360"><a href="#Scope-360"><span class="linenos">360</span></a> +</span><span id="Scope-361"><a href="#Scope-361"><span class="linenos">361</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-362"><a href="#Scope-362"><span class="linenos">362</span></a><span class="sd"> list[exp.Column]: Unqualified columns</span> +</span><span id="Scope-363"><a href="#Scope-363"><span class="linenos">363</span></a><span class="sd"> """</span> +</span><span id="Scope-364"><a href="#Scope-364"><span class="linenos">364</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">c</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span><span class="p">]</span> +</span><span id="Scope-365"><a href="#Scope-365"><span class="linenos">365</span></a> +</span><span id="Scope-366"><a href="#Scope-366"><span class="linenos">366</span></a> <span class="nd">@property</span> +</span><span id="Scope-367"><a href="#Scope-367"><span class="linenos">367</span></a> <span class="k">def</span> <span class="nf">join_hints</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-368"><a href="#Scope-368"><span class="linenos">368</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-369"><a href="#Scope-369"><span class="linenos">369</span></a><span class="sd"> Hints that exist in the scope that reference tables</span> +</span><span id="Scope-370"><a href="#Scope-370"><span class="linenos">370</span></a> +</span><span id="Scope-371"><a href="#Scope-371"><span class="linenos">371</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-372"><a href="#Scope-372"><span class="linenos">372</span></a><span class="sd"> list[exp.JoinHint]: Join hints that are referenced within the scope</span> +</span><span id="Scope-373"><a href="#Scope-373"><span class="linenos">373</span></a><span class="sd"> """</span> +</span><span id="Scope-374"><a href="#Scope-374"><span class="linenos">374</span></a> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> +</span><span id="Scope-375"><a href="#Scope-375"><span class="linenos">375</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="Scope-376"><a href="#Scope-376"><span class="linenos">376</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> </span><span id="Scope-377"><a href="#Scope-377"><span class="linenos">377</span></a> -</span><span id="Scope-378"><a href="#Scope-378"><span class="linenos">378</span></a><span class="sd"> Args:</span> -</span><span id="Scope-379"><a href="#Scope-379"><span class="linenos">379</span></a><span class="sd"> source_name (str): Name of the source</span> -</span><span id="Scope-380"><a href="#Scope-380"><span class="linenos">380</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-381"><a href="#Scope-381"><span class="linenos">381</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> -</span><span id="Scope-382"><a href="#Scope-382"><span class="linenos">382</span></a><span class="sd"> """</span> -</span><span id="Scope-383"><a href="#Scope-383"><span class="linenos">383</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> -</span><span id="Scope-384"><a href="#Scope-384"><span class="linenos">384</span></a> -</span><span id="Scope-385"><a href="#Scope-385"><span class="linenos">385</span></a> <span class="nd">@property</span> -</span><span id="Scope-386"><a href="#Scope-386"><span class="linenos">386</span></a> <span class="k">def</span> <span class="nf">is_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-387"><a href="#Scope-387"><span class="linenos">387</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a subquery"""</span> -</span><span id="Scope-388"><a href="#Scope-388"><span class="linenos">388</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span> -</span><span id="Scope-389"><a href="#Scope-389"><span class="linenos">389</span></a> -</span><span id="Scope-390"><a href="#Scope-390"><span class="linenos">390</span></a> <span class="nd">@property</span> -</span><span id="Scope-391"><a href="#Scope-391"><span class="linenos">391</span></a> <span class="k">def</span> <span class="nf">is_derived_table</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-392"><a href="#Scope-392"><span class="linenos">392</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a derived table"""</span> -</span><span id="Scope-393"><a href="#Scope-393"><span class="linenos">393</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> -</span><span id="Scope-394"><a href="#Scope-394"><span class="linenos">394</span></a> -</span><span id="Scope-395"><a href="#Scope-395"><span class="linenos">395</span></a> <span class="nd">@property</span> -</span><span id="Scope-396"><a href="#Scope-396"><span class="linenos">396</span></a> <span class="k">def</span> <span class="nf">is_union</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-397"><a href="#Scope-397"><span class="linenos">397</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a union"""</span> -</span><span id="Scope-398"><a href="#Scope-398"><span class="linenos">398</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span> +</span><span id="Scope-378"><a href="#Scope-378"><span class="linenos">378</span></a> <span class="nd">@property</span> +</span><span id="Scope-379"><a href="#Scope-379"><span class="linenos">379</span></a> <span class="k">def</span> <span class="nf">pivots</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-380"><a href="#Scope-380"><span class="linenos">380</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span><span class="p">:</span> +</span><span id="Scope-381"><a href="#Scope-381"><span class="linenos">381</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="Scope-382"><a href="#Scope-382"><span class="linenos">382</span></a> <span class="n">pivot</span> +</span><span id="Scope-383"><a href="#Scope-383"><span class="linenos">383</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tables</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">derived_tables</span> +</span><span id="Scope-384"><a href="#Scope-384"><span class="linenos">384</span></a> <span class="k">for</span> <span class="n">pivot</span> <span class="ow">in</span> <span class="n">node</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"pivots"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="Scope-385"><a href="#Scope-385"><span class="linenos">385</span></a> <span class="p">]</span> +</span><span id="Scope-386"><a href="#Scope-386"><span class="linenos">386</span></a> +</span><span id="Scope-387"><a href="#Scope-387"><span class="linenos">387</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> +</span><span id="Scope-388"><a href="#Scope-388"><span class="linenos">388</span></a> +</span><span id="Scope-389"><a href="#Scope-389"><span class="linenos">389</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> +</span><span id="Scope-390"><a href="#Scope-390"><span class="linenos">390</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-391"><a href="#Scope-391"><span class="linenos">391</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> +</span><span id="Scope-392"><a href="#Scope-392"><span class="linenos">392</span></a> +</span><span id="Scope-393"><a href="#Scope-393"><span class="linenos">393</span></a><span class="sd"> Args:</span> +</span><span id="Scope-394"><a href="#Scope-394"><span class="linenos">394</span></a><span class="sd"> source_name (str): Name of the source</span> +</span><span id="Scope-395"><a href="#Scope-395"><span class="linenos">395</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-396"><a href="#Scope-396"><span class="linenos">396</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> +</span><span id="Scope-397"><a href="#Scope-397"><span class="linenos">397</span></a><span class="sd"> """</span> +</span><span id="Scope-398"><a href="#Scope-398"><span class="linenos">398</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> </span><span id="Scope-399"><a href="#Scope-399"><span class="linenos">399</span></a> </span><span id="Scope-400"><a href="#Scope-400"><span class="linenos">400</span></a> <span class="nd">@property</span> -</span><span id="Scope-401"><a href="#Scope-401"><span class="linenos">401</span></a> <span class="k">def</span> <span class="nf">is_cte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-402"><a href="#Scope-402"><span class="linenos">402</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a common table expression"""</span> -</span><span id="Scope-403"><a href="#Scope-403"><span class="linenos">403</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span> +</span><span id="Scope-401"><a href="#Scope-401"><span class="linenos">401</span></a> <span class="k">def</span> <span class="nf">is_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-402"><a href="#Scope-402"><span class="linenos">402</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a subquery"""</span> +</span><span id="Scope-403"><a href="#Scope-403"><span class="linenos">403</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">SUBQUERY</span> </span><span id="Scope-404"><a href="#Scope-404"><span class="linenos">404</span></a> </span><span id="Scope-405"><a href="#Scope-405"><span class="linenos">405</span></a> <span class="nd">@property</span> -</span><span id="Scope-406"><a href="#Scope-406"><span class="linenos">406</span></a> <span class="k">def</span> <span class="nf">is_root</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-407"><a href="#Scope-407"><span class="linenos">407</span></a><span class="w"> </span><span class="sd">"""Determine if this is the root scope"""</span> -</span><span id="Scope-408"><a href="#Scope-408"><span class="linenos">408</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span> +</span><span id="Scope-406"><a href="#Scope-406"><span class="linenos">406</span></a> <span class="k">def</span> <span class="nf">is_derived_table</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-407"><a href="#Scope-407"><span class="linenos">407</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a derived table"""</span> +</span><span id="Scope-408"><a href="#Scope-408"><span class="linenos">408</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">DERIVED_TABLE</span> </span><span id="Scope-409"><a href="#Scope-409"><span class="linenos">409</span></a> </span><span id="Scope-410"><a href="#Scope-410"><span class="linenos">410</span></a> <span class="nd">@property</span> -</span><span id="Scope-411"><a href="#Scope-411"><span class="linenos">411</span></a> <span class="k">def</span> <span class="nf">is_udtf</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-412"><a href="#Scope-412"><span class="linenos">412</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a UDTF (User Defined Table Function)"""</span> -</span><span id="Scope-413"><a href="#Scope-413"><span class="linenos">413</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> +</span><span id="Scope-411"><a href="#Scope-411"><span class="linenos">411</span></a> <span class="k">def</span> <span class="nf">is_union</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-412"><a href="#Scope-412"><span class="linenos">412</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a union"""</span> +</span><span id="Scope-413"><a href="#Scope-413"><span class="linenos">413</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UNION</span> </span><span id="Scope-414"><a href="#Scope-414"><span class="linenos">414</span></a> </span><span id="Scope-415"><a href="#Scope-415"><span class="linenos">415</span></a> <span class="nd">@property</span> -</span><span id="Scope-416"><a href="#Scope-416"><span class="linenos">416</span></a> <span class="k">def</span> <span class="nf">is_correlated_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-417"><a href="#Scope-417"><span class="linenos">417</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a correlated subquery"""</span> -</span><span id="Scope-418"><a href="#Scope-418"><span class="linenos">418</span></a> <span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">is_subquery</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">external_columns</span><span class="p">)</span> +</span><span id="Scope-416"><a href="#Scope-416"><span class="linenos">416</span></a> <span class="k">def</span> <span class="nf">is_cte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-417"><a href="#Scope-417"><span class="linenos">417</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a common table expression"""</span> +</span><span id="Scope-418"><a href="#Scope-418"><span class="linenos">418</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">CTE</span> </span><span id="Scope-419"><a href="#Scope-419"><span class="linenos">419</span></a> -</span><span id="Scope-420"><a href="#Scope-420"><span class="linenos">420</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> -</span><span id="Scope-421"><a href="#Scope-421"><span class="linenos">421</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> -</span><span id="Scope-422"><a href="#Scope-422"><span class="linenos">422</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="Scope-423"><a href="#Scope-423"><span class="linenos">423</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> +</span><span id="Scope-420"><a href="#Scope-420"><span class="linenos">420</span></a> <span class="nd">@property</span> +</span><span id="Scope-421"><a href="#Scope-421"><span class="linenos">421</span></a> <span class="k">def</span> <span class="nf">is_root</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-422"><a href="#Scope-422"><span class="linenos">422</span></a><span class="w"> </span><span class="sd">"""Determine if this is the root scope"""</span> +</span><span id="Scope-423"><a href="#Scope-423"><span class="linenos">423</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span> </span><span id="Scope-424"><a href="#Scope-424"><span class="linenos">424</span></a> -</span><span id="Scope-425"><a href="#Scope-425"><span class="linenos">425</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> -</span><span id="Scope-426"><a href="#Scope-426"><span class="linenos">426</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> -</span><span id="Scope-427"><a href="#Scope-427"><span class="linenos">427</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> -</span><span id="Scope-428"><a href="#Scope-428"><span class="linenos">428</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-425"><a href="#Scope-425"><span class="linenos">425</span></a> <span class="nd">@property</span> +</span><span id="Scope-426"><a href="#Scope-426"><span class="linenos">426</span></a> <span class="k">def</span> <span class="nf">is_udtf</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-427"><a href="#Scope-427"><span class="linenos">427</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a UDTF (User Defined Table Function)"""</span> +</span><span id="Scope-428"><a href="#Scope-428"><span class="linenos">428</span></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">==</span> <span class="n">ScopeType</span><span class="o">.</span><span class="n">UDTF</span> </span><span id="Scope-429"><a href="#Scope-429"><span class="linenos">429</span></a> -</span><span id="Scope-430"><a href="#Scope-430"><span class="linenos">430</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> -</span><span id="Scope-431"><a href="#Scope-431"><span class="linenos">431</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> -</span><span id="Scope-432"><a href="#Scope-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="Scope-433"><a href="#Scope-433"><span class="linenos">433</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-430"><a href="#Scope-430"><span class="linenos">430</span></a> <span class="nd">@property</span> +</span><span id="Scope-431"><a href="#Scope-431"><span class="linenos">431</span></a> <span class="k">def</span> <span class="nf">is_correlated_subquery</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-432"><a href="#Scope-432"><span class="linenos">432</span></a><span class="w"> </span><span class="sd">"""Determine if this scope is a correlated subquery"""</span> +</span><span id="Scope-433"><a href="#Scope-433"><span class="linenos">433</span></a> <span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">is_subquery</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">external_columns</span><span class="p">)</span> </span><span id="Scope-434"><a href="#Scope-434"><span class="linenos">434</span></a> -</span><span id="Scope-435"><a href="#Scope-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-436"><a href="#Scope-436"><span class="linenos">436</span></a> <span class="k">return</span> <span class="sa">f</span><span class="s2">"Scope<</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span><span class="si">}</span><span class="s2">>"</span> -</span><span id="Scope-437"><a href="#Scope-437"><span class="linenos">437</span></a> -</span><span id="Scope-438"><a href="#Scope-438"><span class="linenos">438</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-439"><a href="#Scope-439"><span class="linenos">439</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-440"><a href="#Scope-440"><span class="linenos">440</span></a><span class="sd"> Traverse the scope tree from this node.</span> -</span><span id="Scope-441"><a href="#Scope-441"><span class="linenos">441</span></a> -</span><span id="Scope-442"><a href="#Scope-442"><span class="linenos">442</span></a><span class="sd"> Yields:</span> -</span><span id="Scope-443"><a href="#Scope-443"><span class="linenos">443</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> -</span><span id="Scope-444"><a href="#Scope-444"><span class="linenos">444</span></a><span class="sd"> """</span> -</span><span id="Scope-445"><a href="#Scope-445"><span class="linenos">445</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> -</span><span id="Scope-446"><a href="#Scope-446"><span class="linenos">446</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> -</span><span id="Scope-447"><a href="#Scope-447"><span class="linenos">447</span></a> <span class="p">):</span> -</span><span id="Scope-448"><a href="#Scope-448"><span class="linenos">448</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> -</span><span id="Scope-449"><a href="#Scope-449"><span class="linenos">449</span></a> <span class="k">yield</span> <span class="bp">self</span> -</span><span id="Scope-450"><a href="#Scope-450"><span class="linenos">450</span></a> -</span><span id="Scope-451"><a href="#Scope-451"><span class="linenos">451</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope-452"><a href="#Scope-452"><span class="linenos">452</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope-453"><a href="#Scope-453"><span class="linenos">453</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> -</span><span id="Scope-454"><a href="#Scope-454"><span class="linenos">454</span></a> -</span><span id="Scope-455"><a href="#Scope-455"><span class="linenos">455</span></a><span class="sd"> Returns:</span> -</span><span id="Scope-456"><a href="#Scope-456"><span class="linenos">456</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> -</span><span id="Scope-457"><a href="#Scope-457"><span class="linenos">457</span></a><span class="sd"> """</span> -</span><span id="Scope-458"><a href="#Scope-458"><span class="linenos">458</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> -</span><span id="Scope-459"><a href="#Scope-459"><span class="linenos">459</span></a> -</span><span id="Scope-460"><a href="#Scope-460"><span class="linenos">460</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="Scope-461"><a href="#Scope-461"><span class="linenos">461</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="Scope-462"><a href="#Scope-462"><span class="linenos">462</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> -</span><span id="Scope-463"><a href="#Scope-463"><span class="linenos">463</span></a> -</span><span id="Scope-464"><a href="#Scope-464"><span class="linenos">464</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> +</span><span id="Scope-435"><a href="#Scope-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> +</span><span id="Scope-436"><a href="#Scope-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> +</span><span id="Scope-437"><a href="#Scope-437"><span class="linenos">437</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="Scope-438"><a href="#Scope-438"><span class="linenos">438</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> +</span><span id="Scope-439"><a href="#Scope-439"><span class="linenos">439</span></a> +</span><span id="Scope-440"><a href="#Scope-440"><span class="linenos">440</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> +</span><span id="Scope-441"><a href="#Scope-441"><span class="linenos">441</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> +</span><span id="Scope-442"><a href="#Scope-442"><span class="linenos">442</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> +</span><span id="Scope-443"><a href="#Scope-443"><span class="linenos">443</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-444"><a href="#Scope-444"><span class="linenos">444</span></a> +</span><span id="Scope-445"><a href="#Scope-445"><span class="linenos">445</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> +</span><span id="Scope-446"><a href="#Scope-446"><span class="linenos">446</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> +</span><span id="Scope-447"><a href="#Scope-447"><span class="linenos">447</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Scope-448"><a href="#Scope-448"><span class="linenos">448</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope-449"><a href="#Scope-449"><span class="linenos">449</span></a> +</span><span id="Scope-450"><a href="#Scope-450"><span class="linenos">450</span></a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-451"><a href="#Scope-451"><span class="linenos">451</span></a> <span class="k">return</span> <span class="sa">f</span><span class="s2">"Scope<</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span><span class="si">}</span><span class="s2">>"</span> +</span><span id="Scope-452"><a href="#Scope-452"><span class="linenos">452</span></a> +</span><span id="Scope-453"><a href="#Scope-453"><span class="linenos">453</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-454"><a href="#Scope-454"><span class="linenos">454</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-455"><a href="#Scope-455"><span class="linenos">455</span></a><span class="sd"> Traverse the scope tree from this node.</span> +</span><span id="Scope-456"><a href="#Scope-456"><span class="linenos">456</span></a> +</span><span id="Scope-457"><a href="#Scope-457"><span class="linenos">457</span></a><span class="sd"> Yields:</span> +</span><span id="Scope-458"><a href="#Scope-458"><span class="linenos">458</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> +</span><span id="Scope-459"><a href="#Scope-459"><span class="linenos">459</span></a><span class="sd"> """</span> +</span><span id="Scope-460"><a href="#Scope-460"><span class="linenos">460</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> +</span><span id="Scope-461"><a href="#Scope-461"><span class="linenos">461</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> +</span><span id="Scope-462"><a href="#Scope-462"><span class="linenos">462</span></a> <span class="p">):</span> +</span><span id="Scope-463"><a href="#Scope-463"><span class="linenos">463</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> +</span><span id="Scope-464"><a href="#Scope-464"><span class="linenos">464</span></a> <span class="k">yield</span> <span class="bp">self</span> +</span><span id="Scope-465"><a href="#Scope-465"><span class="linenos">465</span></a> +</span><span id="Scope-466"><a href="#Scope-466"><span class="linenos">466</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope-467"><a href="#Scope-467"><span class="linenos">467</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope-468"><a href="#Scope-468"><span class="linenos">468</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> +</span><span id="Scope-469"><a href="#Scope-469"><span class="linenos">469</span></a> +</span><span id="Scope-470"><a href="#Scope-470"><span class="linenos">470</span></a><span class="sd"> Returns:</span> +</span><span id="Scope-471"><a href="#Scope-471"><span class="linenos">471</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> +</span><span id="Scope-472"><a href="#Scope-472"><span class="linenos">472</span></a><span class="sd"> """</span> +</span><span id="Scope-473"><a href="#Scope-473"><span class="linenos">473</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> +</span><span id="Scope-474"><a href="#Scope-474"><span class="linenos">474</span></a> +</span><span id="Scope-475"><a href="#Scope-475"><span class="linenos">475</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="Scope-476"><a href="#Scope-476"><span class="linenos">476</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="Scope-477"><a href="#Scope-477"><span class="linenos">477</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> +</span><span id="Scope-478"><a href="#Scope-478"><span class="linenos">478</span></a> +</span><span id="Scope-479"><a href="#Scope-479"><span class="linenos">479</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> </span></pre></div> @@ -1480,29 +1525,29 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.__init__"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.__init__-51"><a href="#Scope.__init__-51"><span class="linenos">51</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> -</span><span id="Scope.__init__-52"><a href="#Scope.__init__-52"><span class="linenos">52</span></a> <span class="bp">self</span><span class="p">,</span> -</span><span id="Scope.__init__-53"><a href="#Scope.__init__-53"><span class="linenos">53</span></a> <span class="n">expression</span><span class="p">,</span> -</span><span id="Scope.__init__-54"><a href="#Scope.__init__-54"><span class="linenos">54</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope.__init__-55"><a href="#Scope.__init__-55"><span class="linenos">55</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope.__init__-56"><a href="#Scope.__init__-56"><span class="linenos">56</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope.__init__-57"><a href="#Scope.__init__-57"><span class="linenos">57</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> -</span><span id="Scope.__init__-58"><a href="#Scope.__init__-58"><span class="linenos">58</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> -</span><span id="Scope.__init__-59"><a href="#Scope.__init__-59"><span class="linenos">59</span></a> <span class="p">):</span> -</span><span id="Scope.__init__-60"><a href="#Scope.__init__-60"><span class="linenos">60</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="Scope.__init__-61"><a href="#Scope.__init__-61"><span class="linenos">61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> -</span><span id="Scope.__init__-62"><a href="#Scope.__init__-62"><span class="linenos">62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> -</span><span id="Scope.__init__-63"><a href="#Scope.__init__-63"><span class="linenos">63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> -</span><span id="Scope.__init__-64"><a href="#Scope.__init__-64"><span class="linenos">64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> -</span><span id="Scope.__init__-65"><a href="#Scope.__init__-65"><span class="linenos">65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> -</span><span id="Scope.__init__-66"><a href="#Scope.__init__-66"><span class="linenos">66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> -</span><span id="Scope.__init__-67"><a href="#Scope.__init__-67"><span class="linenos">67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-68"><a href="#Scope.__init__-68"><span class="linenos">68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-69"><a href="#Scope.__init__-69"><span class="linenos">69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-70"><a href="#Scope.__init__-70"><span class="linenos">70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-71"><a href="#Scope.__init__-71"><span class="linenos">71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-72"><a href="#Scope.__init__-72"><span class="linenos">72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="Scope.__init__-73"><a href="#Scope.__init__-73"><span class="linenos">73</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.__init__-52"><a href="#Scope.__init__-52"><span class="linenos">52</span></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> +</span><span id="Scope.__init__-53"><a href="#Scope.__init__-53"><span class="linenos">53</span></a> <span class="bp">self</span><span class="p">,</span> +</span><span id="Scope.__init__-54"><a href="#Scope.__init__-54"><span class="linenos">54</span></a> <span class="n">expression</span><span class="p">,</span> +</span><span id="Scope.__init__-55"><a href="#Scope.__init__-55"><span class="linenos">55</span></a> <span class="n">sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope.__init__-56"><a href="#Scope.__init__-56"><span class="linenos">56</span></a> <span class="n">outer_column_list</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope.__init__-57"><a href="#Scope.__init__-57"><span class="linenos">57</span></a> <span class="n">parent</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope.__init__-58"><a href="#Scope.__init__-58"><span class="linenos">58</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">ScopeType</span><span class="o">.</span><span class="n">ROOT</span><span class="p">,</span> +</span><span id="Scope.__init__-59"><a href="#Scope.__init__-59"><span class="linenos">59</span></a> <span class="n">lateral_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> +</span><span id="Scope.__init__-60"><a href="#Scope.__init__-60"><span class="linenos">60</span></a> <span class="p">):</span> +</span><span id="Scope.__init__-61"><a href="#Scope.__init__-61"><span class="linenos">61</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">expression</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="Scope.__init__-62"><a href="#Scope.__init__-62"><span class="linenos">62</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span> <span class="o">=</span> <span class="n">sources</span> <span class="ow">or</span> <span class="p">{}</span> +</span><span id="Scope.__init__-63"><a href="#Scope.__init__-63"><span class="linenos">63</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span> <span class="o">=</span> <span class="n">lateral_sources</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span> <span class="k">if</span> <span class="n">lateral_sources</span> <span class="k">else</span> <span class="p">{}</span> +</span><span id="Scope.__init__-64"><a href="#Scope.__init__-64"><span class="linenos">64</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lateral_sources</span><span class="p">)</span> +</span><span id="Scope.__init__-65"><a href="#Scope.__init__-65"><span class="linenos">65</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">outer_column_list</span> <span class="o">=</span> <span class="n">outer_column_list</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="Scope.__init__-66"><a href="#Scope.__init__-66"><span class="linenos">66</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span> +</span><span id="Scope.__init__-67"><a href="#Scope.__init__-67"><span class="linenos">67</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">scope_type</span> <span class="o">=</span> <span class="n">scope_type</span> +</span><span id="Scope.__init__-68"><a href="#Scope.__init__-68"><span class="linenos">68</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-69"><a href="#Scope.__init__-69"><span class="linenos">69</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">derived_table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-70"><a href="#Scope.__init__-70"><span class="linenos">70</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-71"><a href="#Scope.__init__-71"><span class="linenos">71</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-72"><a href="#Scope.__init__-72"><span class="linenos">72</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-73"><a href="#Scope.__init__-73"><span class="linenos">73</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">udtf_scopes</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="Scope.__init__-74"><a href="#Scope.__init__-74"><span class="linenos">74</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span></pre></div> @@ -1520,18 +1565,19 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.clear_cache"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.clear_cache-75"><a href="#Scope.clear_cache-75"><span class="linenos">75</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope.clear_cache-76"><a href="#Scope.clear_cache-76"><span class="linenos">76</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="Scope.clear_cache-77"><a href="#Scope.clear_cache-77"><span class="linenos">77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-78"><a href="#Scope.clear_cache-78"><span class="linenos">78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-79"><a href="#Scope.clear_cache-79"><span class="linenos">79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-80"><a href="#Scope.clear_cache-80"><span class="linenos">80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-81"><a href="#Scope.clear_cache-81"><span class="linenos">81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-82"><a href="#Scope.clear_cache-82"><span class="linenos">82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-83"><a href="#Scope.clear_cache-83"><span class="linenos">83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-84"><a href="#Scope.clear_cache-84"><span class="linenos">84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-85"><a href="#Scope.clear_cache-85"><span class="linenos">85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="Scope.clear_cache-86"><a href="#Scope.clear_cache-86"><span class="linenos">86</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.clear_cache-76"><a href="#Scope.clear_cache-76"><span class="linenos">76</span></a> <span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope.clear_cache-77"><a href="#Scope.clear_cache-77"><span class="linenos">77</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_collected</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="Scope.clear_cache-78"><a href="#Scope.clear_cache-78"><span class="linenos">78</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_raw_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-79"><a href="#Scope.clear_cache-79"><span class="linenos">79</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_derived_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-80"><a href="#Scope.clear_cache-80"><span class="linenos">80</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_udtfs</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-81"><a href="#Scope.clear_cache-81"><span class="linenos">81</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_tables</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-82"><a href="#Scope.clear_cache-82"><span class="linenos">82</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_ctes</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-83"><a href="#Scope.clear_cache-83"><span class="linenos">83</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_subqueries</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-84"><a href="#Scope.clear_cache-84"><span class="linenos">84</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_sources</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-85"><a href="#Scope.clear_cache-85"><span class="linenos">85</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-86"><a href="#Scope.clear_cache-86"><span class="linenos">86</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_external_columns</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-87"><a href="#Scope.clear_cache-87"><span class="linenos">87</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_join_hints</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="Scope.clear_cache-88"><a href="#Scope.clear_cache-88"><span class="linenos">88</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">_pivots</span> <span class="o">=</span> <span class="kc">None</span> </span></pre></div> @@ -1549,15 +1595,15 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.branch"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.branch-88"><a href="#Scope.branch-88"><span class="linenos">88</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> -</span><span id="Scope.branch-89"><a href="#Scope.branch-89"><span class="linenos">89</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> -</span><span id="Scope.branch-90"><a href="#Scope.branch-90"><span class="linenos">90</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> -</span><span id="Scope.branch-91"><a href="#Scope.branch-91"><span class="linenos">91</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> -</span><span id="Scope.branch-92"><a href="#Scope.branch-92"><span class="linenos">92</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> -</span><span id="Scope.branch-93"><a href="#Scope.branch-93"><span class="linenos">93</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> -</span><span id="Scope.branch-94"><a href="#Scope.branch-94"><span class="linenos">94</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> -</span><span id="Scope.branch-95"><a href="#Scope.branch-95"><span class="linenos">95</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> -</span><span id="Scope.branch-96"><a href="#Scope.branch-96"><span class="linenos">96</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.branch-90"><a href="#Scope.branch-90"><span class="linenos">90</span></a> <span class="k">def</span> <span class="nf">branch</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">expression</span><span class="p">,</span> <span class="n">scope_type</span><span class="p">,</span> <span class="n">chain_sources</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> +</span><span id="Scope.branch-91"><a href="#Scope.branch-91"><span class="linenos">91</span></a><span class="w"> </span><span class="sd">"""Branch from the current scope to a new, inner scope"""</span> +</span><span id="Scope.branch-92"><a href="#Scope.branch-92"><span class="linenos">92</span></a> <span class="k">return</span> <span class="n">Scope</span><span class="p">(</span> +</span><span id="Scope.branch-93"><a href="#Scope.branch-93"><span class="linenos">93</span></a> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">(),</span> +</span><span id="Scope.branch-94"><a href="#Scope.branch-94"><span class="linenos">94</span></a> <span class="n">sources</span><span class="o">=</span><span class="p">{</span><span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">cte_sources</span><span class="p">,</span> <span class="o">**</span><span class="p">(</span><span class="n">chain_sources</span> <span class="ow">or</span> <span class="p">{})},</span> +</span><span id="Scope.branch-95"><a href="#Scope.branch-95"><span class="linenos">95</span></a> <span class="n">parent</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> +</span><span id="Scope.branch-96"><a href="#Scope.branch-96"><span class="linenos">96</span></a> <span class="n">scope_type</span><span class="o">=</span><span class="n">scope_type</span><span class="p">,</span> +</span><span id="Scope.branch-97"><a href="#Scope.branch-97"><span class="linenos">97</span></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> +</span><span id="Scope.branch-98"><a href="#Scope.branch-98"><span class="linenos">98</span></a> <span class="p">)</span> </span></pre></div> @@ -1577,8 +1623,8 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.walk"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.walk-131"><a href="#Scope.walk-131"><span class="linenos">131</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope.walk-132"><a href="#Scope.walk-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.walk-133"><a href="#Scope.walk-133"><span class="linenos">133</span></a> <span class="k">def</span> <span class="nf">walk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope.walk-134"><a href="#Scope.walk-134"><span class="linenos">134</span></a> <span class="k">return</span> <span class="n">walk_in_scope</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">)</span> </span></pre></div> @@ -1596,21 +1642,21 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.find"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.find-134"><a href="#Scope.find-134"><span class="linenos">134</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope.find-135"><a href="#Scope.find-135"><span class="linenos">135</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.find-136"><a href="#Scope.find-136"><span class="linenos">136</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> -</span><span id="Scope.find-137"><a href="#Scope.find-137"><span class="linenos">137</span></a> -</span><span id="Scope.find-138"><a href="#Scope.find-138"><span class="linenos">138</span></a><span class="sd"> This does NOT traverse into subscopes.</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.find-136"><a href="#Scope.find-136"><span class="linenos">136</span></a> <span class="k">def</span> <span class="nf">find</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope.find-137"><a href="#Scope.find-137"><span class="linenos">137</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.find-138"><a href="#Scope.find-138"><span class="linenos">138</span></a><span class="sd"> Returns the first node in this scope which matches at least one of the specified types.</span> </span><span id="Scope.find-139"><a href="#Scope.find-139"><span class="linenos">139</span></a> -</span><span id="Scope.find-140"><a href="#Scope.find-140"><span class="linenos">140</span></a><span class="sd"> Args:</span> -</span><span id="Scope.find-141"><a href="#Scope.find-141"><span class="linenos">141</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="Scope.find-142"><a href="#Scope.find-142"><span class="linenos">142</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="Scope.find-143"><a href="#Scope.find-143"><span class="linenos">143</span></a> -</span><span id="Scope.find-144"><a href="#Scope.find-144"><span class="linenos">144</span></a><span class="sd"> Returns:</span> -</span><span id="Scope.find-145"><a href="#Scope.find-145"><span class="linenos">145</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> -</span><span id="Scope.find-146"><a href="#Scope.find-146"><span class="linenos">146</span></a><span class="sd"> the criteria was found.</span> -</span><span id="Scope.find-147"><a href="#Scope.find-147"><span class="linenos">147</span></a><span class="sd"> """</span> -</span><span id="Scope.find-148"><a href="#Scope.find-148"><span class="linenos">148</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Scope.find-140"><a href="#Scope.find-140"><span class="linenos">140</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope.find-141"><a href="#Scope.find-141"><span class="linenos">141</span></a> +</span><span id="Scope.find-142"><a href="#Scope.find-142"><span class="linenos">142</span></a><span class="sd"> Args:</span> +</span><span id="Scope.find-143"><a href="#Scope.find-143"><span class="linenos">143</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="Scope.find-144"><a href="#Scope.find-144"><span class="linenos">144</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="Scope.find-145"><a href="#Scope.find-145"><span class="linenos">145</span></a> +</span><span id="Scope.find-146"><a href="#Scope.find-146"><span class="linenos">146</span></a><span class="sd"> Returns:</span> +</span><span id="Scope.find-147"><a href="#Scope.find-147"><span class="linenos">147</span></a><span class="sd"> exp.Expression: the node which matches the criteria or None if no node matching</span> +</span><span id="Scope.find-148"><a href="#Scope.find-148"><span class="linenos">148</span></a><span class="sd"> the criteria was found.</span> +</span><span id="Scope.find-149"><a href="#Scope.find-149"><span class="linenos">149</span></a><span class="sd"> """</span> +</span><span id="Scope.find-150"><a href="#Scope.find-150"><span class="linenos">150</span></a> <span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">),</span> <span class="kc">None</span><span class="p">)</span> </span></pre></div> @@ -1646,23 +1692,23 @@ a list of the left and right child scopes.</li> </div> <a class="headerlink" href="#Scope.find_all"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.find_all-150"><a href="#Scope.find_all-150"><span class="linenos">150</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="Scope.find_all-151"><a href="#Scope.find_all-151"><span class="linenos">151</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.find_all-152"><a href="#Scope.find_all-152"><span class="linenos">152</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> -</span><span id="Scope.find_all-153"><a href="#Scope.find_all-153"><span class="linenos">153</span></a><span class="sd"> match at least one of the specified expression types.</span> -</span><span id="Scope.find_all-154"><a href="#Scope.find_all-154"><span class="linenos">154</span></a> -</span><span id="Scope.find_all-155"><a href="#Scope.find_all-155"><span class="linenos">155</span></a><span class="sd"> This does NOT traverse into subscopes.</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.find_all-152"><a href="#Scope.find_all-152"><span class="linenos">152</span></a> <span class="k">def</span> <span class="nf">find_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">expression_types</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="Scope.find_all-153"><a href="#Scope.find_all-153"><span class="linenos">153</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.find_all-154"><a href="#Scope.find_all-154"><span class="linenos">154</span></a><span class="sd"> Returns a generator object which visits all nodes in this scope and only yields those that</span> +</span><span id="Scope.find_all-155"><a href="#Scope.find_all-155"><span class="linenos">155</span></a><span class="sd"> match at least one of the specified expression types.</span> </span><span id="Scope.find_all-156"><a href="#Scope.find_all-156"><span class="linenos">156</span></a> -</span><span id="Scope.find_all-157"><a href="#Scope.find_all-157"><span class="linenos">157</span></a><span class="sd"> Args:</span> -</span><span id="Scope.find_all-158"><a href="#Scope.find_all-158"><span class="linenos">158</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> -</span><span id="Scope.find_all-159"><a href="#Scope.find_all-159"><span class="linenos">159</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> -</span><span id="Scope.find_all-160"><a href="#Scope.find_all-160"><span class="linenos">160</span></a> -</span><span id="Scope.find_all-161"><a href="#Scope.find_all-161"><span class="linenos">161</span></a><span class="sd"> Yields:</span> -</span><span id="Scope.find_all-162"><a href="#Scope.find_all-162"><span class="linenos">162</span></a><span class="sd"> exp.Expression: nodes</span> -</span><span id="Scope.find_all-163"><a href="#Scope.find_all-163"><span class="linenos">163</span></a><span class="sd"> """</span> -</span><span id="Scope.find_all-164"><a href="#Scope.find_all-164"><span class="linenos">164</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> -</span><span id="Scope.find_all-165"><a href="#Scope.find_all-165"><span class="linenos">165</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> -</span><span id="Scope.find_all-166"><a href="#Scope.find_all-166"><span class="linenos">166</span></a> <span class="k">yield</span> <span class="n">expression</span> +</span><span id="Scope.find_all-157"><a href="#Scope.find_all-157"><span class="linenos">157</span></a><span class="sd"> This does NOT traverse into subscopes.</span> +</span><span id="Scope.find_all-158"><a href="#Scope.find_all-158"><span class="linenos">158</span></a> +</span><span id="Scope.find_all-159"><a href="#Scope.find_all-159"><span class="linenos">159</span></a><span class="sd"> Args:</span> +</span><span id="Scope.find_all-160"><a href="#Scope.find_all-160"><span class="linenos">160</span></a><span class="sd"> expression_types (type): the expression type(s) to match.</span> +</span><span id="Scope.find_all-161"><a href="#Scope.find_all-161"><span class="linenos">161</span></a><span class="sd"> bfs (bool): True to use breadth-first search, False to use depth-first.</span> +</span><span id="Scope.find_all-162"><a href="#Scope.find_all-162"><span class="linenos">162</span></a> +</span><span id="Scope.find_all-163"><a href="#Scope.find_all-163"><span class="linenos">163</span></a><span class="sd"> Yields:</span> +</span><span id="Scope.find_all-164"><a href="#Scope.find_all-164"><span class="linenos">164</span></a><span class="sd"> exp.Expression: nodes</span> +</span><span id="Scope.find_all-165"><a href="#Scope.find_all-165"><span class="linenos">165</span></a><span class="sd"> """</span> +</span><span id="Scope.find_all-166"><a href="#Scope.find_all-166"><span class="linenos">166</span></a> <span class="k">for</span> <span class="n">expression</span><span class="p">,</span> <span class="o">*</span><span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">):</span> +</span><span id="Scope.find_all-167"><a href="#Scope.find_all-167"><span class="linenos">167</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">expression_types</span><span class="p">):</span> +</span><span id="Scope.find_all-168"><a href="#Scope.find_all-168"><span class="linenos">168</span></a> <span class="k">yield</span> <span class="n">expression</span> </span></pre></div> @@ -1698,18 +1744,18 @@ match at least one of the specified expression types.</p> </div> <a class="headerlink" href="#Scope.replace"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.replace-168"><a href="#Scope.replace-168"><span class="linenos">168</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> -</span><span id="Scope.replace-169"><a href="#Scope.replace-169"><span class="linenos">169</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.replace-170"><a href="#Scope.replace-170"><span class="linenos">170</span></a><span class="sd"> Replace `old` with `new`.</span> -</span><span id="Scope.replace-171"><a href="#Scope.replace-171"><span class="linenos">171</span></a> -</span><span id="Scope.replace-172"><a href="#Scope.replace-172"><span class="linenos">172</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.replace-170"><a href="#Scope.replace-170"><span class="linenos">170</span></a> <span class="k">def</span> <span class="nf">replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old</span><span class="p">,</span> <span class="n">new</span><span class="p">):</span> +</span><span id="Scope.replace-171"><a href="#Scope.replace-171"><span class="linenos">171</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.replace-172"><a href="#Scope.replace-172"><span class="linenos">172</span></a><span class="sd"> Replace `old` with `new`.</span> </span><span id="Scope.replace-173"><a href="#Scope.replace-173"><span class="linenos">173</span></a> -</span><span id="Scope.replace-174"><a href="#Scope.replace-174"><span class="linenos">174</span></a><span class="sd"> Args:</span> -</span><span id="Scope.replace-175"><a href="#Scope.replace-175"><span class="linenos">175</span></a><span class="sd"> old (exp.Expression): old node</span> -</span><span id="Scope.replace-176"><a href="#Scope.replace-176"><span class="linenos">176</span></a><span class="sd"> new (exp.Expression): new node</span> -</span><span id="Scope.replace-177"><a href="#Scope.replace-177"><span class="linenos">177</span></a><span class="sd"> """</span> -</span><span id="Scope.replace-178"><a href="#Scope.replace-178"><span class="linenos">178</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> -</span><span id="Scope.replace-179"><a href="#Scope.replace-179"><span class="linenos">179</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="Scope.replace-174"><a href="#Scope.replace-174"><span class="linenos">174</span></a><span class="sd"> This can be used instead of `exp.Expression.replace` to ensure the `Scope` is kept up-to-date.</span> +</span><span id="Scope.replace-175"><a href="#Scope.replace-175"><span class="linenos">175</span></a> +</span><span id="Scope.replace-176"><a href="#Scope.replace-176"><span class="linenos">176</span></a><span class="sd"> Args:</span> +</span><span id="Scope.replace-177"><a href="#Scope.replace-177"><span class="linenos">177</span></a><span class="sd"> old (exp.Expression): old node</span> +</span><span id="Scope.replace-178"><a href="#Scope.replace-178"><span class="linenos">178</span></a><span class="sd"> new (exp.Expression): new node</span> +</span><span id="Scope.replace-179"><a href="#Scope.replace-179"><span class="linenos">179</span></a><span class="sd"> """</span> +</span><span id="Scope.replace-180"><a href="#Scope.replace-180"><span class="linenos">180</span></a> <span class="n">old</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> +</span><span id="Scope.replace-181"><a href="#Scope.replace-181"><span class="linenos">181</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span></pre></div> @@ -1988,16 +2034,16 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.source_columns"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.source_columns-374"><a href="#Scope.source_columns-374"><span class="linenos">374</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> -</span><span id="Scope.source_columns-375"><a href="#Scope.source_columns-375"><span class="linenos">375</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.source_columns-376"><a href="#Scope.source_columns-376"><span class="linenos">376</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> -</span><span id="Scope.source_columns-377"><a href="#Scope.source_columns-377"><span class="linenos">377</span></a> -</span><span id="Scope.source_columns-378"><a href="#Scope.source_columns-378"><span class="linenos">378</span></a><span class="sd"> Args:</span> -</span><span id="Scope.source_columns-379"><a href="#Scope.source_columns-379"><span class="linenos">379</span></a><span class="sd"> source_name (str): Name of the source</span> -</span><span id="Scope.source_columns-380"><a href="#Scope.source_columns-380"><span class="linenos">380</span></a><span class="sd"> Returns:</span> -</span><span id="Scope.source_columns-381"><a href="#Scope.source_columns-381"><span class="linenos">381</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> -</span><span id="Scope.source_columns-382"><a href="#Scope.source_columns-382"><span class="linenos">382</span></a><span class="sd"> """</span> -</span><span id="Scope.source_columns-383"><a href="#Scope.source_columns-383"><span class="linenos">383</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.source_columns-389"><a href="#Scope.source_columns-389"><span class="linenos">389</span></a> <span class="k">def</span> <span class="nf">source_columns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source_name</span><span class="p">):</span> +</span><span id="Scope.source_columns-390"><a href="#Scope.source_columns-390"><span class="linenos">390</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.source_columns-391"><a href="#Scope.source_columns-391"><span class="linenos">391</span></a><span class="sd"> Get all columns in the current scope for a particular source.</span> +</span><span id="Scope.source_columns-392"><a href="#Scope.source_columns-392"><span class="linenos">392</span></a> +</span><span id="Scope.source_columns-393"><a href="#Scope.source_columns-393"><span class="linenos">393</span></a><span class="sd"> Args:</span> +</span><span id="Scope.source_columns-394"><a href="#Scope.source_columns-394"><span class="linenos">394</span></a><span class="sd"> source_name (str): Name of the source</span> +</span><span id="Scope.source_columns-395"><a href="#Scope.source_columns-395"><span class="linenos">395</span></a><span class="sd"> Returns:</span> +</span><span id="Scope.source_columns-396"><a href="#Scope.source_columns-396"><span class="linenos">396</span></a><span class="sd"> list[exp.Column]: Column instances that reference `source_name`</span> +</span><span id="Scope.source_columns-397"><a href="#Scope.source_columns-397"><span class="linenos">397</span></a><span class="sd"> """</span> +</span><span id="Scope.source_columns-398"><a href="#Scope.source_columns-398"><span class="linenos">398</span></a> <span class="k">return</span> <span class="p">[</span><span class="n">column</span> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">columns</span> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">source_name</span><span class="p">]</span> </span></pre></div> @@ -2120,10 +2166,10 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.rename_source"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.rename_source-420"><a href="#Scope.rename_source-420"><span class="linenos">420</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> -</span><span id="Scope.rename_source-421"><a href="#Scope.rename_source-421"><span class="linenos">421</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> -</span><span id="Scope.rename_source-422"><a href="#Scope.rename_source-422"><span class="linenos">422</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="Scope.rename_source-423"><a href="#Scope.rename_source-423"><span class="linenos">423</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.rename_source-435"><a href="#Scope.rename_source-435"><span class="linenos">435</span></a> <span class="k">def</span> <span class="nf">rename_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">old_name</span><span class="p">,</span> <span class="n">new_name</span><span class="p">):</span> +</span><span id="Scope.rename_source-436"><a href="#Scope.rename_source-436"><span class="linenos">436</span></a><span class="w"> </span><span class="sd">"""Rename a source in this scope"""</span> +</span><span id="Scope.rename_source-437"><a href="#Scope.rename_source-437"><span class="linenos">437</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">old_name</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="Scope.rename_source-438"><a href="#Scope.rename_source-438"><span class="linenos">438</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">columns</span> </span></pre></div> @@ -2143,10 +2189,10 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.add_source"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.add_source-425"><a href="#Scope.add_source-425"><span class="linenos">425</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> -</span><span id="Scope.add_source-426"><a href="#Scope.add_source-426"><span class="linenos">426</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> -</span><span id="Scope.add_source-427"><a href="#Scope.add_source-427"><span class="linenos">427</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> -</span><span id="Scope.add_source-428"><a href="#Scope.add_source-428"><span class="linenos">428</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.add_source-440"><a href="#Scope.add_source-440"><span class="linenos">440</span></a> <span class="k">def</span> <span class="nf">add_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span> +</span><span id="Scope.add_source-441"><a href="#Scope.add_source-441"><span class="linenos">441</span></a><span class="w"> </span><span class="sd">"""Add a source to this scope"""</span> +</span><span id="Scope.add_source-442"><a href="#Scope.add_source-442"><span class="linenos">442</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">source</span> +</span><span id="Scope.add_source-443"><a href="#Scope.add_source-443"><span class="linenos">443</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span></pre></div> @@ -2166,10 +2212,10 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.remove_source"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.remove_source-430"><a href="#Scope.remove_source-430"><span class="linenos">430</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> -</span><span id="Scope.remove_source-431"><a href="#Scope.remove_source-431"><span class="linenos">431</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> -</span><span id="Scope.remove_source-432"><a href="#Scope.remove_source-432"><span class="linenos">432</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="Scope.remove_source-433"><a href="#Scope.remove_source-433"><span class="linenos">433</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.remove_source-445"><a href="#Scope.remove_source-445"><span class="linenos">445</span></a> <span class="k">def</span> <span class="nf">remove_source</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> +</span><span id="Scope.remove_source-446"><a href="#Scope.remove_source-446"><span class="linenos">446</span></a><span class="w"> </span><span class="sd">"""Remove a source from this scope"""</span> +</span><span id="Scope.remove_source-447"><a href="#Scope.remove_source-447"><span class="linenos">447</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="Scope.remove_source-448"><a href="#Scope.remove_source-448"><span class="linenos">448</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> </span></pre></div> @@ -2189,18 +2235,18 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.traverse"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.traverse-438"><a href="#Scope.traverse-438"><span class="linenos">438</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope.traverse-439"><a href="#Scope.traverse-439"><span class="linenos">439</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.traverse-440"><a href="#Scope.traverse-440"><span class="linenos">440</span></a><span class="sd"> Traverse the scope tree from this node.</span> -</span><span id="Scope.traverse-441"><a href="#Scope.traverse-441"><span class="linenos">441</span></a> -</span><span id="Scope.traverse-442"><a href="#Scope.traverse-442"><span class="linenos">442</span></a><span class="sd"> Yields:</span> -</span><span id="Scope.traverse-443"><a href="#Scope.traverse-443"><span class="linenos">443</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> -</span><span id="Scope.traverse-444"><a href="#Scope.traverse-444"><span class="linenos">444</span></a><span class="sd"> """</span> -</span><span id="Scope.traverse-445"><a href="#Scope.traverse-445"><span class="linenos">445</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> -</span><span id="Scope.traverse-446"><a href="#Scope.traverse-446"><span class="linenos">446</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> -</span><span id="Scope.traverse-447"><a href="#Scope.traverse-447"><span class="linenos">447</span></a> <span class="p">):</span> -</span><span id="Scope.traverse-448"><a href="#Scope.traverse-448"><span class="linenos">448</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> -</span><span id="Scope.traverse-449"><a href="#Scope.traverse-449"><span class="linenos">449</span></a> <span class="k">yield</span> <span class="bp">self</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.traverse-453"><a href="#Scope.traverse-453"><span class="linenos">453</span></a> <span class="k">def</span> <span class="nf">traverse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope.traverse-454"><a href="#Scope.traverse-454"><span class="linenos">454</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.traverse-455"><a href="#Scope.traverse-455"><span class="linenos">455</span></a><span class="sd"> Traverse the scope tree from this node.</span> +</span><span id="Scope.traverse-456"><a href="#Scope.traverse-456"><span class="linenos">456</span></a> +</span><span id="Scope.traverse-457"><a href="#Scope.traverse-457"><span class="linenos">457</span></a><span class="sd"> Yields:</span> +</span><span id="Scope.traverse-458"><a href="#Scope.traverse-458"><span class="linenos">458</span></a><span class="sd"> Scope: scope instances in depth-first-search post-order</span> +</span><span id="Scope.traverse-459"><a href="#Scope.traverse-459"><span class="linenos">459</span></a><span class="sd"> """</span> +</span><span id="Scope.traverse-460"><a href="#Scope.traverse-460"><span class="linenos">460</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> +</span><span id="Scope.traverse-461"><a href="#Scope.traverse-461"><span class="linenos">461</span></a> <span class="bp">self</span><span class="o">.</span><span class="n">cte_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">subquery_scopes</span> +</span><span id="Scope.traverse-462"><a href="#Scope.traverse-462"><span class="linenos">462</span></a> <span class="p">):</span> +</span><span id="Scope.traverse-463"><a href="#Scope.traverse-463"><span class="linenos">463</span></a> <span class="k">yield from</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">()</span> +</span><span id="Scope.traverse-464"><a href="#Scope.traverse-464"><span class="linenos">464</span></a> <span class="k">yield</span> <span class="bp">self</span> </span></pre></div> @@ -2226,20 +2272,20 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< </div> <a class="headerlink" href="#Scope.ref_count"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.ref_count-451"><a href="#Scope.ref_count-451"><span class="linenos">451</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> -</span><span id="Scope.ref_count-452"><a href="#Scope.ref_count-452"><span class="linenos">452</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="Scope.ref_count-453"><a href="#Scope.ref_count-453"><span class="linenos">453</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> -</span><span id="Scope.ref_count-454"><a href="#Scope.ref_count-454"><span class="linenos">454</span></a> -</span><span id="Scope.ref_count-455"><a href="#Scope.ref_count-455"><span class="linenos">455</span></a><span class="sd"> Returns:</span> -</span><span id="Scope.ref_count-456"><a href="#Scope.ref_count-456"><span class="linenos">456</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> -</span><span id="Scope.ref_count-457"><a href="#Scope.ref_count-457"><span class="linenos">457</span></a><span class="sd"> """</span> -</span><span id="Scope.ref_count-458"><a href="#Scope.ref_count-458"><span class="linenos">458</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> -</span><span id="Scope.ref_count-459"><a href="#Scope.ref_count-459"><span class="linenos">459</span></a> -</span><span id="Scope.ref_count-460"><a href="#Scope.ref_count-460"><span class="linenos">460</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="Scope.ref_count-461"><a href="#Scope.ref_count-461"><span class="linenos">461</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="Scope.ref_count-462"><a href="#Scope.ref_count-462"><span class="linenos">462</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> -</span><span id="Scope.ref_count-463"><a href="#Scope.ref_count-463"><span class="linenos">463</span></a> -</span><span id="Scope.ref_count-464"><a href="#Scope.ref_count-464"><span class="linenos">464</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="Scope.ref_count-466"><a href="#Scope.ref_count-466"><span class="linenos">466</span></a> <span class="k">def</span> <span class="nf">ref_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> +</span><span id="Scope.ref_count-467"><a href="#Scope.ref_count-467"><span class="linenos">467</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="Scope.ref_count-468"><a href="#Scope.ref_count-468"><span class="linenos">468</span></a><span class="sd"> Count the number of times each scope in this tree is referenced.</span> +</span><span id="Scope.ref_count-469"><a href="#Scope.ref_count-469"><span class="linenos">469</span></a> +</span><span id="Scope.ref_count-470"><a href="#Scope.ref_count-470"><span class="linenos">470</span></a><span class="sd"> Returns:</span> +</span><span id="Scope.ref_count-471"><a href="#Scope.ref_count-471"><span class="linenos">471</span></a><span class="sd"> dict[int, int]: Mapping of Scope instance ID to reference count</span> +</span><span id="Scope.ref_count-472"><a href="#Scope.ref_count-472"><span class="linenos">472</span></a><span class="sd"> """</span> +</span><span id="Scope.ref_count-473"><a href="#Scope.ref_count-473"><span class="linenos">473</span></a> <span class="n">scope_ref_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="mi">0</span><span class="p">)</span> +</span><span id="Scope.ref_count-474"><a href="#Scope.ref_count-474"><span class="linenos">474</span></a> +</span><span id="Scope.ref_count-475"><a href="#Scope.ref_count-475"><span class="linenos">475</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="Scope.ref_count-476"><a href="#Scope.ref_count-476"><span class="linenos">476</span></a> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="Scope.ref_count-477"><a href="#Scope.ref_count-477"><span class="linenos">477</span></a> <span class="n">scope_ref_count</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">source</span><span class="p">)]</span> <span class="o">+=</span> <span class="mi">1</span> +</span><span id="Scope.ref_count-478"><a href="#Scope.ref_count-478"><span class="linenos">478</span></a> +</span><span id="Scope.ref_count-479"><a href="#Scope.ref_count-479"><span class="linenos">479</span></a> <span class="k">return</span> <span class="n">scope_ref_count</span> </span></pre></div> @@ -2260,38 +2306,40 @@ table only becomes a selected source if it's included in a FROM or JOIN clause.< <div class="attr function"> <span class="def">def</span> - <span class="name">traverse_scope</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span></span><span class="return-annotation">):</span></span> + <span class="name">traverse_scope</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n">List</span><span class="p">[</span><span class="n"><a href="#Scope">sqlglot.optimizer.scope.Scope</a></span><span class="p">]</span>:</span></span> <label class="view-source-button" for="traverse_scope-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#traverse_scope"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="traverse_scope-467"><a href="#traverse_scope-467"><span class="linenos">467</span></a><span class="k">def</span> <span class="nf">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="traverse_scope-468"><a href="#traverse_scope-468"><span class="linenos">468</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="traverse_scope-469"><a href="#traverse_scope-469"><span class="linenos">469</span></a><span class="sd"> Traverse an expression by it's "scopes".</span> -</span><span id="traverse_scope-470"><a href="#traverse_scope-470"><span class="linenos">470</span></a> -</span><span id="traverse_scope-471"><a href="#traverse_scope-471"><span class="linenos">471</span></a><span class="sd"> "Scope" represents the current context of a Select statement.</span> -</span><span id="traverse_scope-472"><a href="#traverse_scope-472"><span class="linenos">472</span></a> -</span><span id="traverse_scope-473"><a href="#traverse_scope-473"><span class="linenos">473</span></a><span class="sd"> This is helpful for optimizing queries, where we need more information than</span> -</span><span id="traverse_scope-474"><a href="#traverse_scope-474"><span class="linenos">474</span></a><span class="sd"> the expression tree itself. For example, we might care about the source</span> -</span><span id="traverse_scope-475"><a href="#traverse_scope-475"><span class="linenos">475</span></a><span class="sd"> names within a subquery. Returns a list because a generator could result in</span> -</span><span id="traverse_scope-476"><a href="#traverse_scope-476"><span class="linenos">476</span></a><span class="sd"> incomplete properties which is confusing.</span> -</span><span id="traverse_scope-477"><a href="#traverse_scope-477"><span class="linenos">477</span></a> -</span><span id="traverse_scope-478"><a href="#traverse_scope-478"><span class="linenos">478</span></a><span class="sd"> Examples:</span> -</span><span id="traverse_scope-479"><a href="#traverse_scope-479"><span class="linenos">479</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="traverse_scope-480"><a href="#traverse_scope-480"><span class="linenos">480</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT a FROM x) AS y")</span> -</span><span id="traverse_scope-481"><a href="#traverse_scope-481"><span class="linenos">481</span></a><span class="sd"> >>> scopes = traverse_scope(expression)</span> -</span><span id="traverse_scope-482"><a href="#traverse_scope-482"><span class="linenos">482</span></a><span class="sd"> >>> scopes[0].expression.sql(), list(scopes[0].sources)</span> -</span><span id="traverse_scope-483"><a href="#traverse_scope-483"><span class="linenos">483</span></a><span class="sd"> ('SELECT a FROM x', ['x'])</span> -</span><span id="traverse_scope-484"><a href="#traverse_scope-484"><span class="linenos">484</span></a><span class="sd"> >>> scopes[1].expression.sql(), list(scopes[1].sources)</span> -</span><span id="traverse_scope-485"><a href="#traverse_scope-485"><span class="linenos">485</span></a><span class="sd"> ('SELECT a FROM (SELECT a FROM x) AS y', ['y'])</span> -</span><span id="traverse_scope-486"><a href="#traverse_scope-486"><span class="linenos">486</span></a> -</span><span id="traverse_scope-487"><a href="#traverse_scope-487"><span class="linenos">487</span></a><span class="sd"> Args:</span> -</span><span id="traverse_scope-488"><a href="#traverse_scope-488"><span class="linenos">488</span></a><span class="sd"> expression (exp.Expression): expression to traverse</span> -</span><span id="traverse_scope-489"><a href="#traverse_scope-489"><span class="linenos">489</span></a><span class="sd"> Returns:</span> -</span><span id="traverse_scope-490"><a href="#traverse_scope-490"><span class="linenos">490</span></a><span class="sd"> list[Scope]: scope instances</span> -</span><span id="traverse_scope-491"><a href="#traverse_scope-491"><span class="linenos">491</span></a><span class="sd"> """</span> -</span><span id="traverse_scope-492"><a href="#traverse_scope-492"><span class="linenos">492</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">_traverse_scope</span><span class="p">(</span><span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)))</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="traverse_scope-482"><a href="#traverse_scope-482"><span class="linenos">482</span></a><span class="k">def</span> <span class="nf">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">List</span><span class="p">[</span><span class="n">Scope</span><span class="p">]:</span> +</span><span id="traverse_scope-483"><a href="#traverse_scope-483"><span class="linenos">483</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="traverse_scope-484"><a href="#traverse_scope-484"><span class="linenos">484</span></a><span class="sd"> Traverse an expression by it's "scopes".</span> +</span><span id="traverse_scope-485"><a href="#traverse_scope-485"><span class="linenos">485</span></a> +</span><span id="traverse_scope-486"><a href="#traverse_scope-486"><span class="linenos">486</span></a><span class="sd"> "Scope" represents the current context of a Select statement.</span> +</span><span id="traverse_scope-487"><a href="#traverse_scope-487"><span class="linenos">487</span></a> +</span><span id="traverse_scope-488"><a href="#traverse_scope-488"><span class="linenos">488</span></a><span class="sd"> This is helpful for optimizing queries, where we need more information than</span> +</span><span id="traverse_scope-489"><a href="#traverse_scope-489"><span class="linenos">489</span></a><span class="sd"> the expression tree itself. For example, we might care about the source</span> +</span><span id="traverse_scope-490"><a href="#traverse_scope-490"><span class="linenos">490</span></a><span class="sd"> names within a subquery. Returns a list because a generator could result in</span> +</span><span id="traverse_scope-491"><a href="#traverse_scope-491"><span class="linenos">491</span></a><span class="sd"> incomplete properties which is confusing.</span> +</span><span id="traverse_scope-492"><a href="#traverse_scope-492"><span class="linenos">492</span></a> +</span><span id="traverse_scope-493"><a href="#traverse_scope-493"><span class="linenos">493</span></a><span class="sd"> Examples:</span> +</span><span id="traverse_scope-494"><a href="#traverse_scope-494"><span class="linenos">494</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="traverse_scope-495"><a href="#traverse_scope-495"><span class="linenos">495</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT a FROM x) AS y")</span> +</span><span id="traverse_scope-496"><a href="#traverse_scope-496"><span class="linenos">496</span></a><span class="sd"> >>> scopes = traverse_scope(expression)</span> +</span><span id="traverse_scope-497"><a href="#traverse_scope-497"><span class="linenos">497</span></a><span class="sd"> >>> scopes[0].expression.sql(), list(scopes[0].sources)</span> +</span><span id="traverse_scope-498"><a href="#traverse_scope-498"><span class="linenos">498</span></a><span class="sd"> ('SELECT a FROM x', ['x'])</span> +</span><span id="traverse_scope-499"><a href="#traverse_scope-499"><span class="linenos">499</span></a><span class="sd"> >>> scopes[1].expression.sql(), list(scopes[1].sources)</span> +</span><span id="traverse_scope-500"><a href="#traverse_scope-500"><span class="linenos">500</span></a><span class="sd"> ('SELECT a FROM (SELECT a FROM x) AS y', ['y'])</span> +</span><span id="traverse_scope-501"><a href="#traverse_scope-501"><span class="linenos">501</span></a> +</span><span id="traverse_scope-502"><a href="#traverse_scope-502"><span class="linenos">502</span></a><span class="sd"> Args:</span> +</span><span id="traverse_scope-503"><a href="#traverse_scope-503"><span class="linenos">503</span></a><span class="sd"> expression (exp.Expression): expression to traverse</span> +</span><span id="traverse_scope-504"><a href="#traverse_scope-504"><span class="linenos">504</span></a><span class="sd"> Returns:</span> +</span><span id="traverse_scope-505"><a href="#traverse_scope-505"><span class="linenos">505</span></a><span class="sd"> list[Scope]: scope instances</span> +</span><span id="traverse_scope-506"><a href="#traverse_scope-506"><span class="linenos">506</span></a><span class="sd"> """</span> +</span><span id="traverse_scope-507"><a href="#traverse_scope-507"><span class="linenos">507</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Unionable</span><span class="p">):</span> +</span><span id="traverse_scope-508"><a href="#traverse_scope-508"><span class="linenos">508</span></a> <span class="k">return</span> <span class="p">[]</span> +</span><span id="traverse_scope-509"><a href="#traverse_scope-509"><span class="linenos">509</span></a> <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">_traverse_scope</span><span class="p">(</span><span class="n">Scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)))</span> </span></pre></div> @@ -2339,22 +2387,25 @@ incomplete properties which is confusing.</p> <div class="attr function"> <span class="def">def</span> - <span class="name">build_scope</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span></span><span class="return-annotation">):</span></span> + <span class="name">build_scope</span><span class="signature pdoc-code multiline">(<span class="param"> <span class="n">expression</span><span class="p">:</span> <span class="n"><a href="../expressions.html#Expression">sqlglot.expressions.Expression</a></span></span><span class="return-annotation">) -> <span class="n">Optional</span><span class="p">[</span><span class="n"><a href="#Scope">sqlglot.optimizer.scope.Scope</a></span><span class="p">]</span>:</span></span> <label class="view-source-button" for="build_scope-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#build_scope"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="build_scope-495"><a href="#build_scope-495"><span class="linenos">495</span></a><span class="k">def</span> <span class="nf">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="build_scope-496"><a href="#build_scope-496"><span class="linenos">496</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="build_scope-497"><a href="#build_scope-497"><span class="linenos">497</span></a><span class="sd"> Build a scope tree.</span> -</span><span id="build_scope-498"><a href="#build_scope-498"><span class="linenos">498</span></a> -</span><span id="build_scope-499"><a href="#build_scope-499"><span class="linenos">499</span></a><span class="sd"> Args:</span> -</span><span id="build_scope-500"><a href="#build_scope-500"><span class="linenos">500</span></a><span class="sd"> expression (exp.Expression): expression to build the scope tree for</span> -</span><span id="build_scope-501"><a href="#build_scope-501"><span class="linenos">501</span></a><span class="sd"> Returns:</span> -</span><span id="build_scope-502"><a href="#build_scope-502"><span class="linenos">502</span></a><span class="sd"> Scope: root scope</span> -</span><span id="build_scope-503"><a href="#build_scope-503"><span class="linenos">503</span></a><span class="sd"> """</span> -</span><span id="build_scope-504"><a href="#build_scope-504"><span class="linenos">504</span></a> <span class="k">return</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="build_scope-512"><a href="#build_scope-512"><span class="linenos">512</span></a><span class="k">def</span> <span class="nf">build_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">t</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="n">Scope</span><span class="p">]:</span> +</span><span id="build_scope-513"><a href="#build_scope-513"><span class="linenos">513</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="build_scope-514"><a href="#build_scope-514"><span class="linenos">514</span></a><span class="sd"> Build a scope tree.</span> +</span><span id="build_scope-515"><a href="#build_scope-515"><span class="linenos">515</span></a> +</span><span id="build_scope-516"><a href="#build_scope-516"><span class="linenos">516</span></a><span class="sd"> Args:</span> +</span><span id="build_scope-517"><a href="#build_scope-517"><span class="linenos">517</span></a><span class="sd"> expression (exp.Expression): expression to build the scope tree for</span> +</span><span id="build_scope-518"><a href="#build_scope-518"><span class="linenos">518</span></a><span class="sd"> Returns:</span> +</span><span id="build_scope-519"><a href="#build_scope-519"><span class="linenos">519</span></a><span class="sd"> Scope: root scope</span> +</span><span id="build_scope-520"><a href="#build_scope-520"><span class="linenos">520</span></a><span class="sd"> """</span> +</span><span id="build_scope-521"><a href="#build_scope-521"><span class="linenos">521</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="build_scope-522"><a href="#build_scope-522"><span class="linenos">522</span></a> <span class="k">if</span> <span class="n">scopes</span><span class="p">:</span> +</span><span id="build_scope-523"><a href="#build_scope-523"><span class="linenos">523</span></a> <span class="k">return</span> <span class="n">scopes</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> +</span><span id="build_scope-524"><a href="#build_scope-524"><span class="linenos">524</span></a> <span class="k">return</span> <span class="kc">None</span> </span></pre></div> @@ -2386,37 +2437,37 @@ incomplete properties which is confusing.</p> </div> <a class="headerlink" href="#walk_in_scope"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="walk_in_scope-649"><a href="#walk_in_scope-649"><span class="linenos">649</span></a><span class="k">def</span> <span class="nf">walk_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="walk_in_scope-650"><a href="#walk_in_scope-650"><span class="linenos">650</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="walk_in_scope-651"><a href="#walk_in_scope-651"><span class="linenos">651</span></a><span class="sd"> Returns a generator object which visits all nodes in the syntrax tree, stopping at</span> -</span><span id="walk_in_scope-652"><a href="#walk_in_scope-652"><span class="linenos">652</span></a><span class="sd"> nodes that start child scopes.</span> -</span><span id="walk_in_scope-653"><a href="#walk_in_scope-653"><span class="linenos">653</span></a> -</span><span id="walk_in_scope-654"><a href="#walk_in_scope-654"><span class="linenos">654</span></a><span class="sd"> Args:</span> -</span><span id="walk_in_scope-655"><a href="#walk_in_scope-655"><span class="linenos">655</span></a><span class="sd"> expression (exp.Expression):</span> -</span><span id="walk_in_scope-656"><a href="#walk_in_scope-656"><span class="linenos">656</span></a><span class="sd"> bfs (bool): if set to True the BFS traversal order will be applied,</span> -</span><span id="walk_in_scope-657"><a href="#walk_in_scope-657"><span class="linenos">657</span></a><span class="sd"> otherwise the DFS traversal will be used instead.</span> -</span><span id="walk_in_scope-658"><a href="#walk_in_scope-658"><span class="linenos">658</span></a> -</span><span id="walk_in_scope-659"><a href="#walk_in_scope-659"><span class="linenos">659</span></a><span class="sd"> Yields:</span> -</span><span id="walk_in_scope-660"><a href="#walk_in_scope-660"><span class="linenos">660</span></a><span class="sd"> tuple[exp.Expression, Optional[exp.Expression], str]: node, parent, arg key</span> -</span><span id="walk_in_scope-661"><a href="#walk_in_scope-661"><span class="linenos">661</span></a><span class="sd"> """</span> -</span><span id="walk_in_scope-662"><a href="#walk_in_scope-662"><span class="linenos">662</span></a> <span class="c1"># We'll use this variable to pass state into the dfs generator.</span> -</span><span id="walk_in_scope-663"><a href="#walk_in_scope-663"><span class="linenos">663</span></a> <span class="c1"># Whenever we set it to True, we exclude a subtree from traversal.</span> -</span><span id="walk_in_scope-664"><a href="#walk_in_scope-664"><span class="linenos">664</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="walk_in_scope-665"><a href="#walk_in_scope-665"><span class="linenos">665</span></a> -</span><span id="walk_in_scope-666"><a href="#walk_in_scope-666"><span class="linenos">666</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">,</span> <span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="n">prune</span><span class="p">):</span> -</span><span id="walk_in_scope-667"><a href="#walk_in_scope-667"><span class="linenos">667</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="walk_in_scope-668"><a href="#walk_in_scope-668"><span class="linenos">668</span></a> -</span><span id="walk_in_scope-669"><a href="#walk_in_scope-669"><span class="linenos">669</span></a> <span class="k">yield</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> -</span><span id="walk_in_scope-670"><a href="#walk_in_scope-670"><span class="linenos">670</span></a> -</span><span id="walk_in_scope-671"><a href="#walk_in_scope-671"><span class="linenos">671</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> -</span><span id="walk_in_scope-672"><a href="#walk_in_scope-672"><span class="linenos">672</span></a> <span class="k">continue</span> -</span><span id="walk_in_scope-673"><a href="#walk_in_scope-673"><span class="linenos">673</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="walk_in_scope-674"><a href="#walk_in_scope-674"><span class="linenos">674</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> -</span><span id="walk_in_scope-675"><a href="#walk_in_scope-675"><span class="linenos">675</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)))</span> -</span><span id="walk_in_scope-676"><a href="#walk_in_scope-676"><span class="linenos">676</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">)</span> -</span><span id="walk_in_scope-677"><a href="#walk_in_scope-677"><span class="linenos">677</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">)</span> -</span><span id="walk_in_scope-678"><a href="#walk_in_scope-678"><span class="linenos">678</span></a> <span class="p">):</span> -</span><span id="walk_in_scope-679"><a href="#walk_in_scope-679"><span class="linenos">679</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">True</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="walk_in_scope-680"><a href="#walk_in_scope-680"><span class="linenos">680</span></a><span class="k">def</span> <span class="nf">walk_in_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">bfs</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="walk_in_scope-681"><a href="#walk_in_scope-681"><span class="linenos">681</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="walk_in_scope-682"><a href="#walk_in_scope-682"><span class="linenos">682</span></a><span class="sd"> Returns a generator object which visits all nodes in the syntrax tree, stopping at</span> +</span><span id="walk_in_scope-683"><a href="#walk_in_scope-683"><span class="linenos">683</span></a><span class="sd"> nodes that start child scopes.</span> +</span><span id="walk_in_scope-684"><a href="#walk_in_scope-684"><span class="linenos">684</span></a> +</span><span id="walk_in_scope-685"><a href="#walk_in_scope-685"><span class="linenos">685</span></a><span class="sd"> Args:</span> +</span><span id="walk_in_scope-686"><a href="#walk_in_scope-686"><span class="linenos">686</span></a><span class="sd"> expression (exp.Expression):</span> +</span><span id="walk_in_scope-687"><a href="#walk_in_scope-687"><span class="linenos">687</span></a><span class="sd"> bfs (bool): if set to True the BFS traversal order will be applied,</span> +</span><span id="walk_in_scope-688"><a href="#walk_in_scope-688"><span class="linenos">688</span></a><span class="sd"> otherwise the DFS traversal will be used instead.</span> +</span><span id="walk_in_scope-689"><a href="#walk_in_scope-689"><span class="linenos">689</span></a> +</span><span id="walk_in_scope-690"><a href="#walk_in_scope-690"><span class="linenos">690</span></a><span class="sd"> Yields:</span> +</span><span id="walk_in_scope-691"><a href="#walk_in_scope-691"><span class="linenos">691</span></a><span class="sd"> tuple[exp.Expression, Optional[exp.Expression], str]: node, parent, arg key</span> +</span><span id="walk_in_scope-692"><a href="#walk_in_scope-692"><span class="linenos">692</span></a><span class="sd"> """</span> +</span><span id="walk_in_scope-693"><a href="#walk_in_scope-693"><span class="linenos">693</span></a> <span class="c1"># We'll use this variable to pass state into the dfs generator.</span> +</span><span id="walk_in_scope-694"><a href="#walk_in_scope-694"><span class="linenos">694</span></a> <span class="c1"># Whenever we set it to True, we exclude a subtree from traversal.</span> +</span><span id="walk_in_scope-695"><a href="#walk_in_scope-695"><span class="linenos">695</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="walk_in_scope-696"><a href="#walk_in_scope-696"><span class="linenos">696</span></a> +</span><span id="walk_in_scope-697"><a href="#walk_in_scope-697"><span class="linenos">697</span></a> <span class="k">for</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">walk</span><span class="p">(</span><span class="n">bfs</span><span class="o">=</span><span class="n">bfs</span><span class="p">,</span> <span class="n">prune</span><span class="o">=</span><span class="k">lambda</span> <span class="o">*</span><span class="n">_</span><span class="p">:</span> <span class="n">prune</span><span class="p">):</span> +</span><span id="walk_in_scope-698"><a href="#walk_in_scope-698"><span class="linenos">698</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="walk_in_scope-699"><a href="#walk_in_scope-699"><span class="linenos">699</span></a> +</span><span id="walk_in_scope-700"><a href="#walk_in_scope-700"><span class="linenos">700</span></a> <span class="k">yield</span> <span class="n">node</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">key</span> +</span><span id="walk_in_scope-701"><a href="#walk_in_scope-701"><span class="linenos">701</span></a> +</span><span id="walk_in_scope-702"><a href="#walk_in_scope-702"><span class="linenos">702</span></a> <span class="k">if</span> <span class="n">node</span> <span class="ow">is</span> <span class="n">expression</span><span class="p">:</span> +</span><span id="walk_in_scope-703"><a href="#walk_in_scope-703"><span class="linenos">703</span></a> <span class="k">continue</span> +</span><span id="walk_in_scope-704"><a href="#walk_in_scope-704"><span class="linenos">704</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="walk_in_scope-705"><a href="#walk_in_scope-705"><span class="linenos">705</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">)</span> +</span><span id="walk_in_scope-706"><a href="#walk_in_scope-706"><span class="linenos">706</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)))</span> +</span><span id="walk_in_scope-707"><a href="#walk_in_scope-707"><span class="linenos">707</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">)</span> +</span><span id="walk_in_scope-708"><a href="#walk_in_scope-708"><span class="linenos">708</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subqueryable</span><span class="p">)</span> +</span><span id="walk_in_scope-709"><a href="#walk_in_scope-709"><span class="linenos">709</span></a> <span class="p">):</span> +</span><span id="walk_in_scope-710"><a href="#walk_in_scope-710"><span class="linenos">710</span></a> <span class="n">prune</span> <span class="o">=</span> <span class="kc">True</span> </span></pre></div> diff --git a/docs/sqlglot/optimizer/simplify.html b/docs/sqlglot/optimizer/simplify.html index 598977c..50bfe02 100644 --- a/docs/sqlglot/optimizer/simplify.html +++ b/docs/sqlglot/optimizer/simplify.html @@ -120,513 +120,515 @@ </span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">decimal</span> <span class="kn">import</span> <span class="n">Decimal</span> </span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a> </span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">exp</span> -</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.generator</span> <span class="kn">import</span> <span class="n">Generator</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.generator</span> <span class="kn">import</span> <span class="n">cached_generator</span> </span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">first</span><span class="p">,</span> <span class="n">while_changing</span> </span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a> -</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="n">GENERATOR</span> <span class="o">=</span> <span class="n">Generator</span><span class="p">(</span><span class="n">normalize</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">identify</span><span class="o">=</span><span class="s2">"safe"</span><span class="p">)</span> -</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> -</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a> -</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a><span class="k">def</span> <span class="nf">simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> Rewrite sqlglot AST to simplify expressions.</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a> -</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> Example:</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> >>> expression = sqlglot.parse_one("TRUE AND TRUE")</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> >>> simplify(expression).sql()</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> 'TRUE'</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> Args:</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> expression (sqlglot.Expression): expression to simplify</span> -</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> Returns:</span> -</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a><span class="sd"> sqlglot.Expression: simplified expression</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> """</span> +</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a> +</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="k">def</span> <span class="nf">simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a><span class="sd"> Rewrite sqlglot AST to simplify expressions.</span> +</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> Example:</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> >>> expression = sqlglot.parse_one("TRUE AND TRUE")</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> >>> simplify(expression).sql()</span> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> 'TRUE'</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> Args:</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> expression (sqlglot.Expression): expression to simplify</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> Returns:</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> sqlglot.Expression: simplified expression</span> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> """</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> <span class="n">generate</span> <span class="o">=</span> <span class="n">cached_generator</span><span class="p">()</span> </span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="n">cache</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="k">def</span> <span class="nf">_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">rewrite_between</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">cache</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">absorb_and_eliminate</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">_simplify</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="kc">False</span><span class="p">))</span> -</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_not</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">flatten</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_connectors</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">remove_compliments</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_literals</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_parens</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="k">return</span> <span class="n">node</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> -</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">while_changing</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify</span><span class="p">)</span> -</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="n">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a><span class="k">def</span> <span class="nf">rewrite_between</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a><span class="w"> </span><span class="sd">"""Rewrite x between y and z to x >= y AND x <= z.</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a><span class="sd"> This is done because comparison simplification is only done on lt/lte/gt/gte.</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a><span class="sd"> """</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Between</span><span class="p">):</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">]),</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"high"</span><span class="p">]),</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="p">)</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> -</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a><span class="k">def</span> <span class="nf">simplify_not</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="sd"> Demorgan's Law</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a><span class="sd"> NOT (x OR y) -> NOT x AND NOT y</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a><span class="sd"> NOT (x AND y) -> NOT x OR NOT y</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a><span class="sd"> """</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="p">)</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="p">)</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="c1"># double negation</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="c1"># NOT NOT x -> x</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a><span class="k">def</span> <span class="nf">flatten</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a><span class="sd"> A AND (B AND C) -> A AND B AND C</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a><span class="sd"> A OR (B OR C) -> A OR B OR C</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a><span class="sd"> """</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">child</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">child</span><span class="p">)</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a><span class="k">def</span> <span class="nf">simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">def</span> <span class="nf">_simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">):</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="p">:</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="n">right</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">)</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="p">):</span> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">return</span> <span class="n">right</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_connectors</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a><span class="n">LT_LTE</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">)</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a><span class="n">GT_GTE</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">)</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a><span class="n">COMPARISONS</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="o">*</span><span class="n">LT_LTE</span><span class="p">,</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="o">*</span><span class="n">GT_GTE</span><span class="p">,</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">,</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a><span class="p">)</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a><span class="n">INVERSE_COMPARISONS</span> <span class="o">=</span> <span class="p">{</span> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">,</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">,</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">,</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">,</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a><span class="p">}</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a><span class="k">def</span> <span class="nf">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">COMPARISONS</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">COMPARISONS</span><span class="p">):</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">ll</span><span class="p">,</span> <span class="n">lr</span> <span class="o">=</span> <span class="n">left</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">rl</span><span class="p">,</span> <span class="n">rr</span> <span class="o">=</span> <span class="n">right</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">largs</span> <span class="o">=</span> <span class="p">{</span><span class="n">ll</span><span class="p">,</span> <span class="n">lr</span><span class="p">}</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">rargs</span> <span class="o">=</span> <span class="p">{</span><span class="n">rl</span><span class="p">,</span> <span class="n">rr</span><span class="p">}</span> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">matching</span> <span class="o">=</span> <span class="n">largs</span> <span class="o">&</span> <span class="n">rargs</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">m</span> <span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matching</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">m</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)}</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="k">if</span> <span class="n">matching</span> <span class="ow">and</span> <span class="n">columns</span><span class="p">:</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">l</span> <span class="o">=</span> <span class="n">first</span><span class="p">(</span><span class="n">largs</span> <span class="o">-</span> <span class="n">columns</span><span class="p">)</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">r</span> <span class="o">=</span> <span class="n">first</span><span class="p">(</span><span class="n">rargs</span> <span class="o">-</span> <span class="n">columns</span><span class="p">)</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="c1"># make sure the comparison is always of the form x > 1 instead of 1 < x</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">if</span> <span class="n">left</span><span class="o">.</span><span class="vm">__class__</span> <span class="ow">in</span> <span class="n">INVERSE_COMPARISONS</span> <span class="ow">and</span> <span class="n">l</span> <span class="o">==</span> <span class="n">ll</span><span class="p">:</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="n">left</span> <span class="o">=</span> <span class="n">INVERSE_COMPARISONS</span><span class="p">[</span><span class="n">left</span><span class="o">.</span><span class="vm">__class__</span><span class="p">](</span><span class="n">this</span><span class="o">=</span><span class="n">lr</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">ll</span><span class="p">)</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">if</span> <span class="n">right</span><span class="o">.</span><span class="vm">__class__</span> <span class="ow">in</span> <span class="n">INVERSE_COMPARISONS</span> <span class="ow">and</span> <span class="n">r</span> <span class="o">==</span> <span class="n">rl</span><span class="p">:</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">right</span> <span class="o">=</span> <span class="n">INVERSE_COMPARISONS</span><span class="p">[</span><span class="n">right</span><span class="o">.</span><span class="vm">__class__</span><span class="p">](</span><span class="n">this</span><span class="o">=</span><span class="n">rr</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">rl</span><span class="p">)</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="k">if</span> <span class="n">l</span><span class="o">.</span><span class="n">is_number</span> <span class="ow">and</span> <span class="n">r</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">l</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">l</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">r</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">r</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="k">elif</span> <span class="n">l</span><span class="o">.</span><span class="n">is_string</span> <span class="ow">and</span> <span class="n">r</span><span class="o">.</span><span class="n">is_string</span><span class="p">:</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="n">l</span> <span class="o">=</span> <span class="n">l</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="n">r</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="k">for</span> <span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">av</span><span class="p">),</span> <span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">bv</span><span class="p">)</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(((</span><span class="n">left</span><span class="p">,</span> <span class="n">l</span><span class="p">),</span> <span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">r</span><span class="p">))):</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">):</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">return</span> <span class="n">left</span> <span class="k">if</span> <span class="p">(</span><span class="n">av</span> <span class="o">></span> <span class="n">bv</span> <span class="k">if</span> <span class="n">or_</span> <span class="k">else</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span><span class="p">)</span> <span class="k">else</span> <span class="n">right</span> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">):</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="k">return</span> <span class="n">left</span> <span class="k">if</span> <span class="p">(</span><span class="n">av</span> <span class="o"><</span> <span class="n">bv</span> <span class="k">if</span> <span class="n">or_</span> <span class="k">else</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span><span class="p">)</span> <span class="k">else</span> <span class="n">right</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="c1"># we can't ever shortcut to true because the column could be null</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">or_</span><span class="p">:</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">):</span> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="k">if</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span><span class="p">:</span> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">):</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="k">if</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span><span class="p">:</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">):</span> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">></span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o"><</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">==</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a><span class="k">def</span> <span class="nf">remove_compliments</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a><span class="sd"> Removing compliments.</span> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a><span class="sd"> A AND NOT A -> FALSE</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a><span class="sd"> A OR NOT A -> TRUE</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a><span class="sd"> """</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">compliment</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> <span class="k">return</span> <span class="n">compliment</span> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="k">def</span> <span class="nf">uniq_sort</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">cache</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> Uniq and sort a connector.</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a><span class="sd"> C AND A AND B AND B -> A AND B AND C</span> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a><span class="sd"> """</span> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">result_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">flattened</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">deduped</span> <span class="o">=</span> <span class="p">{</span><span class="n">GENERATOR</span><span class="o">.</span><span class="n">generate</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">cache</span><span class="p">):</span> <span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">flattened</span><span class="p">}</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">arr</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">deduped</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="c1"># check if the operands are already sorted, if not sort them</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="c1"># A AND C AND B -> A AND B AND C</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">arr</span><span class="p">[</span><span class="mi">1</span><span class="p">:]):</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="n">sql</span> <span class="o"><</span> <span class="n">arr</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="mi">0</span><span class="p">]:</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="p">(</span><span class="n">e</span> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">arr</span><span class="p">)),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="k">break</span> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="c1"># we didn't have to sort but maybe we need to dedup</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">deduped</span><span class="p">)</span> <span class="o"><</span> <span class="nb">len</span><span class="p">(</span><span class="n">flattened</span><span class="p">):</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="n">deduped</span><span class="o">.</span><span class="n">values</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="k">def</span> <span class="nf">_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">rewrite_between</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">generate</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">absorb_and_eliminate</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">_simplify</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="kc">False</span><span class="p">))</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_not</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">flatten</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_connectors</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">remove_compliments</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_literals</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_parens</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="k">return</span> <span class="n">node</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">while_changing</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify</span><span class="p">)</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="n">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-49"><a href="#L-49"><span class="linenos"> 49</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a><span class="k">def</span> <span class="nf">rewrite_between</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a><span class="w"> </span><span class="sd">"""Rewrite x between y and z to x >= y AND x <= z.</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a><span class="sd"> This is done because comparison simplification is only done on lt/lte/gt/gte.</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a><span class="sd"> """</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Between</span><span class="p">):</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">]),</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"high"</span><span class="p">]),</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="p">)</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a><span class="k">def</span> <span class="nf">simplify_not</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a><span class="sd"> Demorgan's Law</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a><span class="sd"> NOT (x OR y) -> NOT x AND NOT y</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="sd"> NOT (x AND y) -> NOT x OR NOT y</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a><span class="sd"> """</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="p">)</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="p">)</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="c1"># double negation</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="c1"># NOT NOT x -> x</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a><span class="k">def</span> <span class="nf">flatten</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a><span class="sd"> A AND (B AND C) -> A AND B AND C</span> +</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a><span class="sd"> A OR (B OR C) -> A OR B OR C</span> +</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a><span class="sd"> """</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> <span class="n">child</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">child</span><span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a><span class="k">def</span> <span class="nf">simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">def</span> <span class="nf">_simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">):</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">if</span> <span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="p">:</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">return</span> <span class="n">right</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">)</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="p">):</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="k">return</span> <span class="n">right</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_connectors</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a><span class="n">LT_LTE</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">)</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a><span class="n">GT_GTE</span> <span class="o">=</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">)</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a><span class="n">COMPARISONS</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="o">*</span><span class="n">LT_LTE</span><span class="p">,</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="o">*</span><span class="n">GT_GTE</span><span class="p">,</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">,</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a><span class="p">)</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a><span class="n">INVERSE_COMPARISONS</span> <span class="o">=</span> <span class="p">{</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">,</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">,</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">,</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">,</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="p">}</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="k">def</span> <span class="nf">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">left</span><span class="p">,</span> <span class="n">COMPARISONS</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">COMPARISONS</span><span class="p">):</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">ll</span><span class="p">,</span> <span class="n">lr</span> <span class="o">=</span> <span class="n">left</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">rl</span><span class="p">,</span> <span class="n">rr</span> <span class="o">=</span> <span class="n">right</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">()</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">largs</span> <span class="o">=</span> <span class="p">{</span><span class="n">ll</span><span class="p">,</span> <span class="n">lr</span><span class="p">}</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">rargs</span> <span class="o">=</span> <span class="p">{</span><span class="n">rl</span><span class="p">,</span> <span class="n">rr</span><span class="p">}</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">matching</span> <span class="o">=</span> <span class="n">largs</span> <span class="o">&</span> <span class="n">rargs</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="p">{</span><span class="n">m</span> <span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">matching</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">m</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)}</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">if</span> <span class="n">matching</span> <span class="ow">and</span> <span class="n">columns</span><span class="p">:</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">l</span> <span class="o">=</span> <span class="n">first</span><span class="p">(</span><span class="n">largs</span> <span class="o">-</span> <span class="n">columns</span><span class="p">)</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">r</span> <span class="o">=</span> <span class="n">first</span><span class="p">(</span><span class="n">rargs</span> <span class="o">-</span> <span class="n">columns</span><span class="p">)</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="c1"># make sure the comparison is always of the form x > 1 instead of 1 < x</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="k">if</span> <span class="n">left</span><span class="o">.</span><span class="vm">__class__</span> <span class="ow">in</span> <span class="n">INVERSE_COMPARISONS</span> <span class="ow">and</span> <span class="n">l</span> <span class="o">==</span> <span class="n">ll</span><span class="p">:</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">left</span> <span class="o">=</span> <span class="n">INVERSE_COMPARISONS</span><span class="p">[</span><span class="n">left</span><span class="o">.</span><span class="vm">__class__</span><span class="p">](</span><span class="n">this</span><span class="o">=</span><span class="n">lr</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">ll</span><span class="p">)</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="k">if</span> <span class="n">right</span><span class="o">.</span><span class="vm">__class__</span> <span class="ow">in</span> <span class="n">INVERSE_COMPARISONS</span> <span class="ow">and</span> <span class="n">r</span> <span class="o">==</span> <span class="n">rl</span><span class="p">:</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="n">right</span> <span class="o">=</span> <span class="n">INVERSE_COMPARISONS</span><span class="p">[</span><span class="n">right</span><span class="o">.</span><span class="vm">__class__</span><span class="p">](</span><span class="n">this</span><span class="o">=</span><span class="n">rr</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">rl</span><span class="p">)</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">if</span> <span class="n">l</span><span class="o">.</span><span class="n">is_number</span> <span class="ow">and</span> <span class="n">r</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a> <span class="n">l</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">l</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a> <span class="n">r</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">r</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="k">elif</span> <span class="n">l</span><span class="o">.</span><span class="n">is_string</span> <span class="ow">and</span> <span class="n">r</span><span class="o">.</span><span class="n">is_string</span><span class="p">:</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">l</span> <span class="o">=</span> <span class="n">l</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">r</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="k">for</span> <span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">av</span><span class="p">),</span> <span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">bv</span><span class="p">)</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(((</span><span class="n">left</span><span class="p">,</span> <span class="n">l</span><span class="p">),</span> <span class="p">(</span><span class="n">right</span><span class="p">,</span> <span class="n">r</span><span class="p">))):</span> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">):</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="k">return</span> <span class="n">left</span> <span class="k">if</span> <span class="p">(</span><span class="n">av</span> <span class="o">></span> <span class="n">bv</span> <span class="k">if</span> <span class="n">or_</span> <span class="k">else</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span><span class="p">)</span> <span class="k">else</span> <span class="n">right</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">):</span> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">return</span> <span class="n">left</span> <span class="k">if</span> <span class="p">(</span><span class="n">av</span> <span class="o"><</span> <span class="n">bv</span> <span class="k">if</span> <span class="n">or_</span> <span class="k">else</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span><span class="p">)</span> <span class="k">else</span> <span class="n">right</span> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="c1"># we can't ever shortcut to true because the column could be null</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">or_</span><span class="p">:</span> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">GT_GTE</span><span class="p">):</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">if</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span><span class="p">:</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">LT_LTE</span><span class="p">):</span> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="k">if</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span><span class="p">:</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">):</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">>=</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">></span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o"><=</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o"><</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">av</span> <span class="o">==</span> <span class="n">bv</span> <span class="k">else</span> <span class="n">a</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a><span class="k">def</span> <span class="nf">remove_compliments</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a><span class="sd"> Removing compliments.</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a><span class="sd"> A AND NOT A -> FALSE</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a><span class="sd"> A OR NOT A -> TRUE</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a><span class="sd"> """</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">compliment</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="k">return</span> <span class="n">compliment</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a><span class="k">def</span> <span class="nf">uniq_sort</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">generate</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> Uniq and sort a connector.</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> C AND A AND B AND B -> A AND B AND C</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a><span class="sd"> """</span> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">result_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">flattened</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">deduped</span> <span class="o">=</span> <span class="p">{</span><span class="n">generate</span><span class="p">(</span><span class="n">e</span><span class="p">):</span> <span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">flattened</span><span class="p">}</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">arr</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">deduped</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="c1"># check if the operands are already sorted, if not sort them</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="c1"># A AND C AND B -> A AND B AND C</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">arr</span><span class="p">[</span><span class="mi">1</span><span class="p">:]):</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">if</span> <span class="n">sql</span> <span class="o"><</span> <span class="n">arr</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="mi">0</span><span class="p">]:</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="p">(</span><span class="n">e</span> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">arr</span><span class="p">)),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">break</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="c1"># we didn't have to sort but maybe we need to dedup</span> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">deduped</span><span class="p">)</span> <span class="o"><</span> <span class="nb">len</span><span class="p">(</span><span class="n">flattened</span><span class="p">):</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="n">deduped</span><span class="o">.</span><span class="n">values</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a><span class="k">def</span> <span class="nf">absorb_and_eliminate</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="sd"> absorption:</span> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="sd"> A AND (A OR B) -> A</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="sd"> A OR (A AND B) -> A</span> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a><span class="sd"> A AND (NOT A OR B) -> A AND B</span> -</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="sd"> A OR (NOT A AND B) -> A OR B</span> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> elimination:</span> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> (A AND B) OR (A AND NOT B) -> A</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> (A OR B) AND (A OR NOT B) -> A</span> -</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> """</span> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="n">aa</span><span class="p">,</span> <span class="n">ab</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="c1"># absorb</span> -</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">aa</span><span class="p">):</span> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">aa</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> -</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">elif</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">ab</span><span class="p">):</span> -</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="n">ab</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="k">elif</span> <span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span><span class="n">b</span><span class="p">})</span> <span class="o"><</span> <span class="nb">set</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">flatten</span><span class="p">()):</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> -</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="c1"># eliminate</span> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> <span class="n">rhs</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="n">ba</span><span class="p">,</span> <span class="n">bb</span> <span class="o">=</span> <span class="n">rhs</span> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="k">if</span> <span class="n">aa</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="k">elif</span> <span class="n">ab</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a><span class="k">def</span> <span class="nf">absorb_and_eliminate</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a><span class="sd"> absorption:</span> +</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a><span class="sd"> A AND (A OR B) -> A</span> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="sd"> A OR (A AND B) -> A</span> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="sd"> A AND (NOT A OR B) -> A AND B</span> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="sd"> A OR (NOT A AND B) -> A OR B</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a><span class="sd"> elimination:</span> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="sd"> (A AND B) OR (A AND NOT B) -> A</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> (A OR B) AND (A OR NOT B) -> A</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> """</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="n">aa</span><span class="p">,</span> <span class="n">ab</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="c1"># absorb</span> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">aa</span><span class="p">):</span> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="n">aa</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="k">elif</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">ab</span><span class="p">):</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">ab</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">elif</span> <span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span><span class="n">b</span><span class="p">})</span> <span class="o"><</span> <span class="nb">set</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">flatten</span><span class="p">()):</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="c1"># eliminate</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="n">rhs</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> <span class="n">ba</span><span class="p">,</span> <span class="n">bb</span> <span class="o">=</span> <span class="n">rhs</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a> <span class="k">if</span> <span class="n">aa</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> <span class="k">elif</span> <span class="n">ab</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a><span class="k">def</span> <span class="nf">simplify_literals</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_binary</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Neg</span><span class="p">):</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">if</span> <span class="n">this</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">this</span><span class="o">.</span><span class="n">name</span> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">if</span> <span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"-"</span><span class="p">:</span> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="sa">f</span><span class="s2">"-</span><span class="si">{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a><span class="k">def</span> <span class="nf">simplify_literals</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_binary</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Neg</span><span class="p">):</span> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">if</span> <span class="n">this</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">this</span><span class="o">.</span><span class="n">name</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="k">if</span> <span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"-"</span><span class="p">:</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="sa">f</span><span class="s2">"-</span><span class="si">{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> -</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a><span class="k">def</span> <span class="nf">_simplify_binary</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">):</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="n">c</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">not_</span> <span class="o">=</span> <span class="kc">True</span> -</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">c</span> <span class="o">=</span> <span class="n">b</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="n">not_</span> <span class="o">=</span> <span class="kc">False</span> -</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">c</span><span class="p">):</span> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="p">):</span> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">not_</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">):</span> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">not_</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">NullSafeEQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NullSafeNEQ</span><span class="p">)):</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> <span class="k">elif</span> <span class="n">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">b</span><span class="p">):</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="k">if</span> <span class="n">a</span><span class="o">.</span><span class="n">is_number</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">a</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">a</span><span class="o">.</span><span class="n">is_int</span> <span class="k">else</span> <span class="n">Decimal</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="n">b</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">b</span><span class="o">.</span><span class="n">is_int</span> <span class="k">else</span> <span class="n">Decimal</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Sub</span><span class="p">):</span> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">-</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">):</span> -</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">*</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Div</span><span class="p">):</span> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="c1"># engines have differing int div behavior so intdiv is not safe</span> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="nb">int</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">/</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a><span class="k">def</span> <span class="nf">_simplify_binary</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">):</span> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="n">c</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">not_</span> <span class="o">=</span> <span class="kc">True</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="n">c</span> <span class="o">=</span> <span class="n">b</span> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">not_</span> <span class="o">=</span> <span class="kc">False</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">c</span><span class="p">):</span> +</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="p">):</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">not_</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">):</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">not_</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">NullSafeEQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NullSafeNEQ</span><span class="p">)):</span> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a> <span class="k">elif</span> <span class="n">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">b</span><span class="p">):</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="k">if</span> <span class="n">a</span><span class="o">.</span><span class="n">is_number</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="n">a</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">a</span><span class="o">.</span><span class="n">is_int</span> <span class="k">else</span> <span class="n">Decimal</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="n">b</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> <span class="k">if</span> <span class="n">b</span><span class="o">.</span><span class="n">is_int</span> <span class="k">else</span> <span class="n">Decimal</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Sub</span><span class="p">):</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">-</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">):</span> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">*</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Div</span><span class="p">):</span> +</span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> <span class="c1"># engines have differing int div behavior so intdiv is not safe</span> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="nb">int</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">a</span> <span class="o">/</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="n">boolean</span> <span class="o">=</span> <span class="n">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span> </span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="n">boolean</span> <span class="o">=</span> <span class="n">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> -</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">if</span> <span class="n">boolean</span><span class="p">:</span> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">return</span> <span class="n">boolean</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="k">elif</span> <span class="n">a</span><span class="o">.</span><span class="n">is_string</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">is_string</span><span class="p">:</span> -</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="n">boolean</span> <span class="o">=</span> <span class="n">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="k">if</span> <span class="n">boolean</span><span class="p">:</span> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="k">return</span> <span class="n">boolean</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">):</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">extract_date</span><span class="p">(</span><span class="n">a</span><span class="p">),</span> <span class="n">extract_interval</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> -</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> <span class="k">if</span> <span class="n">a</span> <span class="ow">and</span> <span class="n">b</span><span class="p">:</span> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Sub</span><span class="p">):</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">-</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">):</span> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">extract_interval</span><span class="p">(</span><span class="n">a</span><span class="p">),</span> <span class="n">extract_date</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="c1"># you cannot subtract a date from an interval</span> -</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="k">if</span> <span class="n">a</span> <span class="ow">and</span> <span class="n">b</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> -</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">if</span> <span class="n">boolean</span><span class="p">:</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">return</span> <span class="n">boolean</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">elif</span> <span class="n">a</span><span class="o">.</span><span class="n">is_string</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">is_string</span><span class="p">:</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">boolean</span> <span class="o">=</span> <span class="n">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> +</span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> <span class="k">if</span> <span class="n">boolean</span><span class="p">:</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> <span class="k">return</span> <span class="n">boolean</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">):</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">extract_date</span><span class="p">(</span><span class="n">a</span><span class="p">),</span> <span class="n">extract_interval</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> <span class="k">if</span> <span class="n">a</span> <span class="ow">and</span> <span class="n">b</span><span class="p">:</span> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Sub</span><span class="p">):</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">-</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Interval</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Cast</span><span class="p">):</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">extract_interval</span><span class="p">(</span><span class="n">a</span><span class="p">),</span> <span class="n">extract_date</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="c1"># you cannot subtract a date from an interval</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">if</span> <span class="n">a</span> <span class="ow">and</span> <span class="n">b</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">):</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="k">return</span> <span class="n">date_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">+</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> +</span><span id="L-385"><a href="#L-385"><span class="linenos">385</span></a> <span class="k">return</span> <span class="kc">None</span> </span><span id="L-386"><a href="#L-386"><span class="linenos">386</span></a> -</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a> -</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> -</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a><span class="k">def</span> <span class="nf">simplify_parens</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">)</span> -</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="ow">and</span> <span class="p">(</span> -</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">))</span> -</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">)</span> -</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> -</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="p">)</span> -</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="p">):</span> -</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> -</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> -</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a><span class="k">def</span> <span class="nf">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> <span class="k">for</span> <span class="n">where</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">):</span> -</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="n">where</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)):</span> -</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> -</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> -</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> -</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a><span class="k">def</span> <span class="nf">always_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> <span class="k">return</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span> -</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a> <span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span> -</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="p">)</span> -</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> -</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> -</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a><span class="k">def</span> <span class="nf">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> <span class="k">return</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">)</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">a</span> -</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a> -</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> -</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a><span class="k">def</span> <span class="nf">is_false</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> -</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span> -</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a> -</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> -</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a><span class="k">def</span> <span class="nf">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> -</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Null</span> -</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a> -</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> -</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a><span class="k">def</span> <span class="nf">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">)):</span> -</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">==</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> -</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">!=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> -</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">></span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> -</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">>=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> -</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> -</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> -</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> -</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a><span class="k">def</span> <span class="nf">extract_date</span><span class="p">(</span><span class="n">cast</span><span class="p">):</span> -</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> <span class="c1"># The "fromisoformat" conversion could fail if the cast is used on an identifier,</span> -</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a> <span class="c1"># so in that case we can't extract the date.</span> -</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span><span class="p">:</span> -</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">date</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATETIME</span><span class="p">:</span> -</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span> -</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> -</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> -</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a><span class="k">def</span> <span class="nf">extract_interval</span><span class="p">(</span><span class="n">interval</span><span class="p">):</span> -</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a> <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="kn">import</span> <span class="n">relativedelta</span> <span class="c1"># type: ignore</span> -</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">except</span> <span class="ne">ModuleNotFoundError</span><span class="p">:</span> -</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> -</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">interval</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> <span class="n">unit</span> <span class="o">=</span> <span class="n">interval</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> -</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> -</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"year"</span><span class="p">:</span> -</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">years</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"month"</span><span class="p">:</span> -</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">months</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"week"</span><span class="p">:</span> -</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">weeks</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"day"</span><span class="p">:</span> -</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">days</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a> -</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a> -</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a><span class="k">def</span> <span class="nf">date_literal</span><span class="p">(</span><span class="n">date</span><span class="p">):</span> -</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span> -</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="n">date</span><span class="p">),</span> -</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a> <span class="s2">"DATETIME"</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">date</span><span class="p">,</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"DATE"</span><span class="p">,</span> -</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a> <span class="p">)</span> -</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> -</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a> -</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a><span class="k">def</span> <span class="nf">boolean_literal</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> -</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">condition</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a> -</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a> -</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a><span class="k">def</span> <span class="nf">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">simplifier</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a> <span class="k">if</span> <span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">:</span> -</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a> <span class="n">operands</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a> <span class="n">queue</span> <span class="o">=</span> <span class="n">deque</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(</span><span class="n">unnest</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> -</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a> <span class="n">size</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">queue</span><span class="p">)</span> -</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a> -</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a> <span class="k">while</span> <span class="n">queue</span><span class="p">:</span> -</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a> <span class="n">a</span> <span class="o">=</span> <span class="n">queue</span><span class="o">.</span><span class="n">popleft</span><span class="p">()</span> -</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a> -</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">queue</span><span class="p">:</span> -</span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a> <span class="n">result</span> <span class="o">=</span> <span class="n">simplifier</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span> -</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a> -</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> <span class="k">if</span> <span class="n">result</span><span class="p">:</span> -</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> <span class="n">queue</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> -</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> <span class="n">queue</span><span class="o">.</span><span class="n">appendleft</span><span class="p">(</span><span class="n">result</span><span class="p">)</span> -</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="k">break</span> -</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="n">operands</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> -</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> -</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">operands</span><span class="p">)</span> <span class="o"><</span> <span class="n">size</span><span class="p">:</span> -</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a> <span class="k">return</span> <span class="n">functools</span><span class="o">.</span><span class="n">reduce</span><span class="p">(</span> -</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a> <span class="k">lambda</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">:</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">a</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">b</span><span class="p">),</span> <span class="n">operands</span> -</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> <span class="p">)</span> -</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-387"><a href="#L-387"><span class="linenos">387</span></a> +</span><span id="L-388"><a href="#L-388"><span class="linenos">388</span></a><span class="k">def</span> <span class="nf">simplify_parens</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-389"><a href="#L-389"><span class="linenos">389</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> +</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a> +</span><span id="L-392"><a href="#L-392"><span class="linenos">392</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-393"><a href="#L-393"><span class="linenos">393</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-394"><a href="#L-394"><span class="linenos">394</span></a> +</span><span id="L-395"><a href="#L-395"><span class="linenos">395</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span> +</span><span id="L-396"><a href="#L-396"><span class="linenos">396</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">))</span> +</span><span id="L-397"><a href="#L-397"><span class="linenos">397</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">)</span> +</span><span id="L-398"><a href="#L-398"><span class="linenos">398</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> +</span><span id="L-399"><a href="#L-399"><span class="linenos">399</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">))</span> +</span><span id="L-400"><a href="#L-400"><span class="linenos">400</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">))</span> +</span><span id="L-401"><a href="#L-401"><span class="linenos">401</span></a> <span class="p">):</span> +</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a> +</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a> +</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a><span class="k">def</span> <span class="nf">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-407"><a href="#L-407"><span class="linenos">407</span></a> <span class="k">for</span> <span class="n">where</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">):</span> +</span><span id="L-408"><a href="#L-408"><span class="linenos">408</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="L-409"><a href="#L-409"><span class="linenos">409</span></a> <span class="n">where</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-410"><a href="#L-410"><span class="linenos">410</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-411"><a href="#L-411"><span class="linenos">411</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)):</span> +</span><span id="L-412"><a href="#L-412"><span class="linenos">412</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> +</span><span id="L-413"><a href="#L-413"><span class="linenos">413</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="L-414"><a href="#L-414"><span class="linenos">414</span></a> +</span><span id="L-415"><a href="#L-415"><span class="linenos">415</span></a> +</span><span id="L-416"><a href="#L-416"><span class="linenos">416</span></a><span class="k">def</span> <span class="nf">always_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-417"><a href="#L-417"><span class="linenos">417</span></a> <span class="k">return</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span> +</span><span id="L-418"><a href="#L-418"><span class="linenos">418</span></a> <span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span> +</span><span id="L-419"><a href="#L-419"><span class="linenos">419</span></a> <span class="p">)</span> +</span><span id="L-420"><a href="#L-420"><span class="linenos">420</span></a> +</span><span id="L-421"><a href="#L-421"><span class="linenos">421</span></a> +</span><span id="L-422"><a href="#L-422"><span class="linenos">422</span></a><span class="k">def</span> <span class="nf">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="L-423"><a href="#L-423"><span class="linenos">423</span></a> <span class="k">return</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">)</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">a</span> +</span><span id="L-424"><a href="#L-424"><span class="linenos">424</span></a> +</span><span id="L-425"><a href="#L-425"><span class="linenos">425</span></a> +</span><span id="L-426"><a href="#L-426"><span class="linenos">426</span></a><span class="k">def</span> <span class="nf">is_false</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> +</span><span id="L-427"><a href="#L-427"><span class="linenos">427</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span> +</span><span id="L-428"><a href="#L-428"><span class="linenos">428</span></a> +</span><span id="L-429"><a href="#L-429"><span class="linenos">429</span></a> +</span><span id="L-430"><a href="#L-430"><span class="linenos">430</span></a><span class="k">def</span> <span class="nf">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> +</span><span id="L-431"><a href="#L-431"><span class="linenos">431</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Null</span> +</span><span id="L-432"><a href="#L-432"><span class="linenos">432</span></a> +</span><span id="L-433"><a href="#L-433"><span class="linenos">433</span></a> +</span><span id="L-434"><a href="#L-434"><span class="linenos">434</span></a><span class="k">def</span> <span class="nf">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="L-435"><a href="#L-435"><span class="linenos">435</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">)):</span> +</span><span id="L-436"><a href="#L-436"><span class="linenos">436</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">==</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-437"><a href="#L-437"><span class="linenos">437</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> +</span><span id="L-438"><a href="#L-438"><span class="linenos">438</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">!=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-439"><a href="#L-439"><span class="linenos">439</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> +</span><span id="L-440"><a href="#L-440"><span class="linenos">440</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">></span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-441"><a href="#L-441"><span class="linenos">441</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> +</span><span id="L-442"><a href="#L-442"><span class="linenos">442</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">>=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-443"><a href="#L-443"><span class="linenos">443</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> +</span><span id="L-444"><a href="#L-444"><span class="linenos">444</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-445"><a href="#L-445"><span class="linenos">445</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> +</span><span id="L-446"><a href="#L-446"><span class="linenos">446</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-447"><a href="#L-447"><span class="linenos">447</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-448"><a href="#L-448"><span class="linenos">448</span></a> +</span><span id="L-449"><a href="#L-449"><span class="linenos">449</span></a> +</span><span id="L-450"><a href="#L-450"><span class="linenos">450</span></a><span class="k">def</span> <span class="nf">extract_date</span><span class="p">(</span><span class="n">cast</span><span class="p">):</span> +</span><span id="L-451"><a href="#L-451"><span class="linenos">451</span></a> <span class="c1"># The "fromisoformat" conversion could fail if the cast is used on an identifier,</span> +</span><span id="L-452"><a href="#L-452"><span class="linenos">452</span></a> <span class="c1"># so in that case we can't extract the date.</span> +</span><span id="L-453"><a href="#L-453"><span class="linenos">453</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-454"><a href="#L-454"><span class="linenos">454</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span><span class="p">:</span> +</span><span id="L-455"><a href="#L-455"><span class="linenos">455</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">date</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-456"><a href="#L-456"><span class="linenos">456</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATETIME</span><span class="p">:</span> +</span><span id="L-457"><a href="#L-457"><span class="linenos">457</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-458"><a href="#L-458"><span class="linenos">458</span></a> <span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span> +</span><span id="L-459"><a href="#L-459"><span class="linenos">459</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-460"><a href="#L-460"><span class="linenos">460</span></a> +</span><span id="L-461"><a href="#L-461"><span class="linenos">461</span></a> +</span><span id="L-462"><a href="#L-462"><span class="linenos">462</span></a><span class="k">def</span> <span class="nf">extract_interval</span><span class="p">(</span><span class="n">interval</span><span class="p">):</span> +</span><span id="L-463"><a href="#L-463"><span class="linenos">463</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="L-464"><a href="#L-464"><span class="linenos">464</span></a> <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="kn">import</span> <span class="n">relativedelta</span> <span class="c1"># type: ignore</span> +</span><span id="L-465"><a href="#L-465"><span class="linenos">465</span></a> <span class="k">except</span> <span class="ne">ModuleNotFoundError</span><span class="p">:</span> +</span><span id="L-466"><a href="#L-466"><span class="linenos">466</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-467"><a href="#L-467"><span class="linenos">467</span></a> +</span><span id="L-468"><a href="#L-468"><span class="linenos">468</span></a> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">interval</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-469"><a href="#L-469"><span class="linenos">469</span></a> <span class="n">unit</span> <span class="o">=</span> <span class="n">interval</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> +</span><span id="L-470"><a href="#L-470"><span class="linenos">470</span></a> +</span><span id="L-471"><a href="#L-471"><span class="linenos">471</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"year"</span><span class="p">:</span> +</span><span id="L-472"><a href="#L-472"><span class="linenos">472</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">years</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="L-473"><a href="#L-473"><span class="linenos">473</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"month"</span><span class="p">:</span> +</span><span id="L-474"><a href="#L-474"><span class="linenos">474</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">months</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="L-475"><a href="#L-475"><span class="linenos">475</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"week"</span><span class="p">:</span> +</span><span id="L-476"><a href="#L-476"><span class="linenos">476</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">weeks</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="L-477"><a href="#L-477"><span class="linenos">477</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"day"</span><span class="p">:</span> +</span><span id="L-478"><a href="#L-478"><span class="linenos">478</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">days</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="L-479"><a href="#L-479"><span class="linenos">479</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="L-480"><a href="#L-480"><span class="linenos">480</span></a> +</span><span id="L-481"><a href="#L-481"><span class="linenos">481</span></a> +</span><span id="L-482"><a href="#L-482"><span class="linenos">482</span></a><span class="k">def</span> <span class="nf">date_literal</span><span class="p">(</span><span class="n">date</span><span class="p">):</span> +</span><span id="L-483"><a href="#L-483"><span class="linenos">483</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span> +</span><span id="L-484"><a href="#L-484"><span class="linenos">484</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="n">date</span><span class="p">),</span> +</span><span id="L-485"><a href="#L-485"><span class="linenos">485</span></a> <span class="s2">"DATETIME"</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">date</span><span class="p">,</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"DATE"</span><span class="p">,</span> +</span><span id="L-486"><a href="#L-486"><span class="linenos">486</span></a> <span class="p">)</span> +</span><span id="L-487"><a href="#L-487"><span class="linenos">487</span></a> +</span><span id="L-488"><a href="#L-488"><span class="linenos">488</span></a> +</span><span id="L-489"><a href="#L-489"><span class="linenos">489</span></a><span class="k">def</span> <span class="nf">boolean_literal</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> +</span><span id="L-490"><a href="#L-490"><span class="linenos">490</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">condition</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="L-491"><a href="#L-491"><span class="linenos">491</span></a> +</span><span id="L-492"><a href="#L-492"><span class="linenos">492</span></a> +</span><span id="L-493"><a href="#L-493"><span class="linenos">493</span></a><span class="k">def</span> <span class="nf">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">simplifier</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="L-494"><a href="#L-494"><span class="linenos">494</span></a> <span class="k">if</span> <span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">:</span> +</span><span id="L-495"><a href="#L-495"><span class="linenos">495</span></a> <span class="n">operands</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-496"><a href="#L-496"><span class="linenos">496</span></a> <span class="n">queue</span> <span class="o">=</span> <span class="n">deque</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(</span><span class="n">unnest</span><span class="o">=</span><span class="kc">False</span><span class="p">))</span> +</span><span id="L-497"><a href="#L-497"><span class="linenos">497</span></a> <span class="n">size</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">queue</span><span class="p">)</span> +</span><span id="L-498"><a href="#L-498"><span class="linenos">498</span></a> +</span><span id="L-499"><a href="#L-499"><span class="linenos">499</span></a> <span class="k">while</span> <span class="n">queue</span><span class="p">:</span> +</span><span id="L-500"><a href="#L-500"><span class="linenos">500</span></a> <span class="n">a</span> <span class="o">=</span> <span class="n">queue</span><span class="o">.</span><span class="n">popleft</span><span class="p">()</span> +</span><span id="L-501"><a href="#L-501"><span class="linenos">501</span></a> +</span><span id="L-502"><a href="#L-502"><span class="linenos">502</span></a> <span class="k">for</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">queue</span><span class="p">:</span> +</span><span id="L-503"><a href="#L-503"><span class="linenos">503</span></a> <span class="n">result</span> <span class="o">=</span> <span class="n">simplifier</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span> +</span><span id="L-504"><a href="#L-504"><span class="linenos">504</span></a> +</span><span id="L-505"><a href="#L-505"><span class="linenos">505</span></a> <span class="k">if</span> <span class="n">result</span><span class="p">:</span> +</span><span id="L-506"><a href="#L-506"><span class="linenos">506</span></a> <span class="n">queue</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> +</span><span id="L-507"><a href="#L-507"><span class="linenos">507</span></a> <span class="n">queue</span><span class="o">.</span><span class="n">appendleft</span><span class="p">(</span><span class="n">result</span><span class="p">)</span> +</span><span id="L-508"><a href="#L-508"><span class="linenos">508</span></a> <span class="k">break</span> +</span><span id="L-509"><a href="#L-509"><span class="linenos">509</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-510"><a href="#L-510"><span class="linenos">510</span></a> <span class="n">operands</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> +</span><span id="L-511"><a href="#L-511"><span class="linenos">511</span></a> +</span><span id="L-512"><a href="#L-512"><span class="linenos">512</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">operands</span><span class="p">)</span> <span class="o"><</span> <span class="n">size</span><span class="p">:</span> +</span><span id="L-513"><a href="#L-513"><span class="linenos">513</span></a> <span class="k">return</span> <span class="n">functools</span><span class="o">.</span><span class="n">reduce</span><span class="p">(</span> +</span><span id="L-514"><a href="#L-514"><span class="linenos">514</span></a> <span class="k">lambda</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">:</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">a</span><span class="p">,</span> <span class="n">expression</span><span class="o">=</span><span class="n">b</span><span class="p">),</span> <span class="n">operands</span> +</span><span id="L-515"><a href="#L-515"><span class="linenos">515</span></a> <span class="p">)</span> +</span><span id="L-516"><a href="#L-516"><span class="linenos">516</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -642,44 +644,44 @@ </div> <a class="headerlink" href="#simplify"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="simplify-15"><a href="#simplify-15"><span class="linenos">15</span></a><span class="k">def</span> <span class="nf">simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="simplify-16"><a href="#simplify-16"><span class="linenos">16</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="simplify-17"><a href="#simplify-17"><span class="linenos">17</span></a><span class="sd"> Rewrite sqlglot AST to simplify expressions.</span> -</span><span id="simplify-18"><a href="#simplify-18"><span class="linenos">18</span></a> -</span><span id="simplify-19"><a href="#simplify-19"><span class="linenos">19</span></a><span class="sd"> Example:</span> -</span><span id="simplify-20"><a href="#simplify-20"><span class="linenos">20</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="simplify-21"><a href="#simplify-21"><span class="linenos">21</span></a><span class="sd"> >>> expression = sqlglot.parse_one("TRUE AND TRUE")</span> -</span><span id="simplify-22"><a href="#simplify-22"><span class="linenos">22</span></a><span class="sd"> >>> simplify(expression).sql()</span> -</span><span id="simplify-23"><a href="#simplify-23"><span class="linenos">23</span></a><span class="sd"> 'TRUE'</span> -</span><span id="simplify-24"><a href="#simplify-24"><span class="linenos">24</span></a> -</span><span id="simplify-25"><a href="#simplify-25"><span class="linenos">25</span></a><span class="sd"> Args:</span> -</span><span id="simplify-26"><a href="#simplify-26"><span class="linenos">26</span></a><span class="sd"> expression (sqlglot.Expression): expression to simplify</span> -</span><span id="simplify-27"><a href="#simplify-27"><span class="linenos">27</span></a><span class="sd"> Returns:</span> -</span><span id="simplify-28"><a href="#simplify-28"><span class="linenos">28</span></a><span class="sd"> sqlglot.Expression: simplified expression</span> -</span><span id="simplify-29"><a href="#simplify-29"><span class="linenos">29</span></a><span class="sd"> """</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="simplify-13"><a href="#simplify-13"><span class="linenos">13</span></a><span class="k">def</span> <span class="nf">simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="simplify-14"><a href="#simplify-14"><span class="linenos">14</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="simplify-15"><a href="#simplify-15"><span class="linenos">15</span></a><span class="sd"> Rewrite sqlglot AST to simplify expressions.</span> +</span><span id="simplify-16"><a href="#simplify-16"><span class="linenos">16</span></a> +</span><span id="simplify-17"><a href="#simplify-17"><span class="linenos">17</span></a><span class="sd"> Example:</span> +</span><span id="simplify-18"><a href="#simplify-18"><span class="linenos">18</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="simplify-19"><a href="#simplify-19"><span class="linenos">19</span></a><span class="sd"> >>> expression = sqlglot.parse_one("TRUE AND TRUE")</span> +</span><span id="simplify-20"><a href="#simplify-20"><span class="linenos">20</span></a><span class="sd"> >>> simplify(expression).sql()</span> +</span><span id="simplify-21"><a href="#simplify-21"><span class="linenos">21</span></a><span class="sd"> 'TRUE'</span> +</span><span id="simplify-22"><a href="#simplify-22"><span class="linenos">22</span></a> +</span><span id="simplify-23"><a href="#simplify-23"><span class="linenos">23</span></a><span class="sd"> Args:</span> +</span><span id="simplify-24"><a href="#simplify-24"><span class="linenos">24</span></a><span class="sd"> expression (sqlglot.Expression): expression to simplify</span> +</span><span id="simplify-25"><a href="#simplify-25"><span class="linenos">25</span></a><span class="sd"> Returns:</span> +</span><span id="simplify-26"><a href="#simplify-26"><span class="linenos">26</span></a><span class="sd"> sqlglot.Expression: simplified expression</span> +</span><span id="simplify-27"><a href="#simplify-27"><span class="linenos">27</span></a><span class="sd"> """</span> +</span><span id="simplify-28"><a href="#simplify-28"><span class="linenos">28</span></a> +</span><span id="simplify-29"><a href="#simplify-29"><span class="linenos">29</span></a> <span class="n">generate</span> <span class="o">=</span> <span class="n">cached_generator</span><span class="p">()</span> </span><span id="simplify-30"><a href="#simplify-30"><span class="linenos">30</span></a> -</span><span id="simplify-31"><a href="#simplify-31"><span class="linenos">31</span></a> <span class="n">cache</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="simplify-32"><a href="#simplify-32"><span class="linenos">32</span></a> -</span><span id="simplify-33"><a href="#simplify-33"><span class="linenos">33</span></a> <span class="k">def</span> <span class="nf">_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="simplify-34"><a href="#simplify-34"><span class="linenos">34</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">expression</span> -</span><span id="simplify-35"><a href="#simplify-35"><span class="linenos">35</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">rewrite_between</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="simplify-36"><a href="#simplify-36"><span class="linenos">36</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">cache</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify-37"><a href="#simplify-37"><span class="linenos">37</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">absorb_and_eliminate</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify-38"><a href="#simplify-38"><span class="linenos">38</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">_simplify</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="kc">False</span><span class="p">))</span> -</span><span id="simplify-39"><a href="#simplify-39"><span class="linenos">39</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_not</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="simplify-40"><a href="#simplify-40"><span class="linenos">40</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">flatten</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="simplify-41"><a href="#simplify-41"><span class="linenos">41</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_connectors</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify-42"><a href="#simplify-42"><span class="linenos">42</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">remove_compliments</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify-43"><a href="#simplify-43"><span class="linenos">43</span></a> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="simplify-44"><a href="#simplify-44"><span class="linenos">44</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_literals</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify-45"><a href="#simplify-45"><span class="linenos">45</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_parens</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="simplify-46"><a href="#simplify-46"><span class="linenos">46</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> -</span><span id="simplify-47"><a href="#simplify-47"><span class="linenos">47</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> -</span><span id="simplify-48"><a href="#simplify-48"><span class="linenos">48</span></a> <span class="k">return</span> <span class="n">node</span> -</span><span id="simplify-49"><a href="#simplify-49"><span class="linenos">49</span></a> -</span><span id="simplify-50"><a href="#simplify-50"><span class="linenos">50</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">while_changing</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify</span><span class="p">)</span> -</span><span id="simplify-51"><a href="#simplify-51"><span class="linenos">51</span></a> <span class="n">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="simplify-52"><a href="#simplify-52"><span class="linenos">52</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="simplify-31"><a href="#simplify-31"><span class="linenos">31</span></a> <span class="k">def</span> <span class="nf">_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="simplify-32"><a href="#simplify-32"><span class="linenos">32</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">expression</span> +</span><span id="simplify-33"><a href="#simplify-33"><span class="linenos">33</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">rewrite_between</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="simplify-34"><a href="#simplify-34"><span class="linenos">34</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">uniq_sort</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">generate</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify-35"><a href="#simplify-35"><span class="linenos">35</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">absorb_and_eliminate</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify-36"><a href="#simplify-36"><span class="linenos">36</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">replace_children</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">e</span><span class="p">:</span> <span class="n">_simplify</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="kc">False</span><span class="p">))</span> +</span><span id="simplify-37"><a href="#simplify-37"><span class="linenos">37</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_not</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="simplify-38"><a href="#simplify-38"><span class="linenos">38</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">flatten</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="simplify-39"><a href="#simplify-39"><span class="linenos">39</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_connectors</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify-40"><a href="#simplify-40"><span class="linenos">40</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">remove_compliments</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify-41"><a href="#simplify-41"><span class="linenos">41</span></a> <span class="n">node</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="simplify-42"><a href="#simplify-42"><span class="linenos">42</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_literals</span><span class="p">(</span><span class="n">node</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify-43"><a href="#simplify-43"><span class="linenos">43</span></a> <span class="n">node</span> <span class="o">=</span> <span class="n">simplify_parens</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="simplify-44"><a href="#simplify-44"><span class="linenos">44</span></a> <span class="k">if</span> <span class="n">root</span><span class="p">:</span> +</span><span id="simplify-45"><a href="#simplify-45"><span class="linenos">45</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">node</span><span class="p">)</span> +</span><span id="simplify-46"><a href="#simplify-46"><span class="linenos">46</span></a> <span class="k">return</span> <span class="n">node</span> +</span><span id="simplify-47"><a href="#simplify-47"><span class="linenos">47</span></a> +</span><span id="simplify-48"><a href="#simplify-48"><span class="linenos">48</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">while_changing</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify</span><span class="p">)</span> +</span><span id="simplify-49"><a href="#simplify-49"><span class="linenos">49</span></a> <span class="n">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="simplify-50"><a href="#simplify-50"><span class="linenos">50</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -723,18 +725,18 @@ </div> <a class="headerlink" href="#rewrite_between"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="rewrite_between-55"><a href="#rewrite_between-55"><span class="linenos">55</span></a><span class="k">def</span> <span class="nf">rewrite_between</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> -</span><span id="rewrite_between-56"><a href="#rewrite_between-56"><span class="linenos">56</span></a><span class="w"> </span><span class="sd">"""Rewrite x between y and z to x >= y AND x <= z.</span> -</span><span id="rewrite_between-57"><a href="#rewrite_between-57"><span class="linenos">57</span></a> -</span><span id="rewrite_between-58"><a href="#rewrite_between-58"><span class="linenos">58</span></a><span class="sd"> This is done because comparison simplification is only done on lt/lte/gt/gte.</span> -</span><span id="rewrite_between-59"><a href="#rewrite_between-59"><span class="linenos">59</span></a><span class="sd"> """</span> -</span><span id="rewrite_between-60"><a href="#rewrite_between-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Between</span><span class="p">):</span> -</span><span id="rewrite_between-61"><a href="#rewrite_between-61"><span class="linenos">61</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> -</span><span id="rewrite_between-62"><a href="#rewrite_between-62"><span class="linenos">62</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">]),</span> -</span><span id="rewrite_between-63"><a href="#rewrite_between-63"><span class="linenos">63</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"high"</span><span class="p">]),</span> -</span><span id="rewrite_between-64"><a href="#rewrite_between-64"><span class="linenos">64</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="rewrite_between-65"><a href="#rewrite_between-65"><span class="linenos">65</span></a> <span class="p">)</span> -</span><span id="rewrite_between-66"><a href="#rewrite_between-66"><span class="linenos">66</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="rewrite_between-53"><a href="#rewrite_between-53"><span class="linenos">53</span></a><span class="k">def</span> <span class="nf">rewrite_between</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">:</span> +</span><span id="rewrite_between-54"><a href="#rewrite_between-54"><span class="linenos">54</span></a><span class="w"> </span><span class="sd">"""Rewrite x between y and z to x >= y AND x <= z.</span> +</span><span id="rewrite_between-55"><a href="#rewrite_between-55"><span class="linenos">55</span></a> +</span><span id="rewrite_between-56"><a href="#rewrite_between-56"><span class="linenos">56</span></a><span class="sd"> This is done because comparison simplification is only done on lt/lte/gt/gte.</span> +</span><span id="rewrite_between-57"><a href="#rewrite_between-57"><span class="linenos">57</span></a><span class="sd"> """</span> +</span><span id="rewrite_between-58"><a href="#rewrite_between-58"><span class="linenos">58</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Between</span><span class="p">):</span> +</span><span id="rewrite_between-59"><a href="#rewrite_between-59"><span class="linenos">59</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> +</span><span id="rewrite_between-60"><a href="#rewrite_between-60"><span class="linenos">60</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"low"</span><span class="p">]),</span> +</span><span id="rewrite_between-61"><a href="#rewrite_between-61"><span class="linenos">61</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">expression</span><span class="o">=</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"high"</span><span class="p">]),</span> +</span><span id="rewrite_between-62"><a href="#rewrite_between-62"><span class="linenos">62</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="rewrite_between-63"><a href="#rewrite_between-63"><span class="linenos">63</span></a> <span class="p">)</span> +</span><span id="rewrite_between-64"><a href="#rewrite_between-64"><span class="linenos">64</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -756,40 +758,40 @@ </div> <a class="headerlink" href="#simplify_not"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_not-69"><a href="#simplify_not-69"><span class="linenos"> 69</span></a><span class="k">def</span> <span class="nf">simplify_not</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="simplify_not-70"><a href="#simplify_not-70"><span class="linenos"> 70</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="simplify_not-71"><a href="#simplify_not-71"><span class="linenos"> 71</span></a><span class="sd"> Demorgan's Law</span> -</span><span id="simplify_not-72"><a href="#simplify_not-72"><span class="linenos"> 72</span></a><span class="sd"> NOT (x OR y) -> NOT x AND NOT y</span> -</span><span id="simplify_not-73"><a href="#simplify_not-73"><span class="linenos"> 73</span></a><span class="sd"> NOT (x AND y) -> NOT x OR NOT y</span> -</span><span id="simplify_not-74"><a href="#simplify_not-74"><span class="linenos"> 74</span></a><span class="sd"> """</span> -</span><span id="simplify_not-75"><a href="#simplify_not-75"><span class="linenos"> 75</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> -</span><span id="simplify_not-76"><a href="#simplify_not-76"><span class="linenos"> 76</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="simplify_not-77"><a href="#simplify_not-77"><span class="linenos"> 77</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="simplify_not-78"><a href="#simplify_not-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> -</span><span id="simplify_not-79"><a href="#simplify_not-79"><span class="linenos"> 79</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="simplify_not-80"><a href="#simplify_not-80"><span class="linenos"> 80</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> -</span><span id="simplify_not-81"><a href="#simplify_not-81"><span class="linenos"> 81</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span> -</span><span id="simplify_not-82"><a href="#simplify_not-82"><span class="linenos"> 82</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="simplify_not-83"><a href="#simplify_not-83"><span class="linenos"> 83</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="simplify_not-84"><a href="#simplify_not-84"><span class="linenos"> 84</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="simplify_not-85"><a href="#simplify_not-85"><span class="linenos"> 85</span></a> <span class="p">)</span> -</span><span id="simplify_not-86"><a href="#simplify_not-86"><span class="linenos"> 86</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> -</span><span id="simplify_not-87"><a href="#simplify_not-87"><span class="linenos"> 87</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> -</span><span id="simplify_not-88"><a href="#simplify_not-88"><span class="linenos"> 88</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="simplify_not-89"><a href="#simplify_not-89"><span class="linenos"> 89</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="simplify_not-90"><a href="#simplify_not-90"><span class="linenos"> 90</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="simplify_not-91"><a href="#simplify_not-91"><span class="linenos"> 91</span></a> <span class="p">)</span> -</span><span id="simplify_not-92"><a href="#simplify_not-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> -</span><span id="simplify_not-93"><a href="#simplify_not-93"><span class="linenos"> 93</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="simplify_not-94"><a href="#simplify_not-94"><span class="linenos"> 94</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="simplify_not-95"><a href="#simplify_not-95"><span class="linenos"> 95</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="simplify_not-96"><a href="#simplify_not-96"><span class="linenos"> 96</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="simplify_not-97"><a href="#simplify_not-97"><span class="linenos"> 97</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="simplify_not-98"><a href="#simplify_not-98"><span class="linenos"> 98</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> -</span><span id="simplify_not-99"><a href="#simplify_not-99"><span class="linenos"> 99</span></a> <span class="c1"># double negation</span> -</span><span id="simplify_not-100"><a href="#simplify_not-100"><span class="linenos">100</span></a> <span class="c1"># NOT NOT x -> x</span> -</span><span id="simplify_not-101"><a href="#simplify_not-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> -</span><span id="simplify_not-102"><a href="#simplify_not-102"><span class="linenos">102</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_not-67"><a href="#simplify_not-67"><span class="linenos"> 67</span></a><span class="k">def</span> <span class="nf">simplify_not</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="simplify_not-68"><a href="#simplify_not-68"><span class="linenos"> 68</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="simplify_not-69"><a href="#simplify_not-69"><span class="linenos"> 69</span></a><span class="sd"> Demorgan's Law</span> +</span><span id="simplify_not-70"><a href="#simplify_not-70"><span class="linenos"> 70</span></a><span class="sd"> NOT (x OR y) -> NOT x AND NOT y</span> +</span><span id="simplify_not-71"><a href="#simplify_not-71"><span class="linenos"> 71</span></a><span class="sd"> NOT (x AND y) -> NOT x OR NOT y</span> +</span><span id="simplify_not-72"><a href="#simplify_not-72"><span class="linenos"> 72</span></a><span class="sd"> """</span> +</span><span id="simplify_not-73"><a href="#simplify_not-73"><span class="linenos"> 73</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> +</span><span id="simplify_not-74"><a href="#simplify_not-74"><span class="linenos"> 74</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="simplify_not-75"><a href="#simplify_not-75"><span class="linenos"> 75</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="simplify_not-76"><a href="#simplify_not-76"><span class="linenos"> 76</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> +</span><span id="simplify_not-77"><a href="#simplify_not-77"><span class="linenos"> 77</span></a> <span class="n">condition</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="simplify_not-78"><a href="#simplify_not-78"><span class="linenos"> 78</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> +</span><span id="simplify_not-79"><a href="#simplify_not-79"><span class="linenos"> 79</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span><span class="p">(</span> +</span><span id="simplify_not-80"><a href="#simplify_not-80"><span class="linenos"> 80</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="simplify_not-81"><a href="#simplify_not-81"><span class="linenos"> 81</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="simplify_not-82"><a href="#simplify_not-82"><span class="linenos"> 82</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="simplify_not-83"><a href="#simplify_not-83"><span class="linenos"> 83</span></a> <span class="p">)</span> +</span><span id="simplify_not-84"><a href="#simplify_not-84"><span class="linenos"> 84</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> +</span><span id="simplify_not-85"><a href="#simplify_not-85"><span class="linenos"> 85</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span><span class="p">(</span> +</span><span id="simplify_not-86"><a href="#simplify_not-86"><span class="linenos"> 86</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">left</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="simplify_not-87"><a href="#simplify_not-87"><span class="linenos"> 87</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">not_</span><span class="p">(</span><span class="n">condition</span><span class="o">.</span><span class="n">right</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="simplify_not-88"><a href="#simplify_not-88"><span class="linenos"> 88</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="simplify_not-89"><a href="#simplify_not-89"><span class="linenos"> 89</span></a> <span class="p">)</span> +</span><span id="simplify_not-90"><a href="#simplify_not-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> +</span><span id="simplify_not-91"><a href="#simplify_not-91"><span class="linenos"> 91</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="simplify_not-92"><a href="#simplify_not-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="simplify_not-93"><a href="#simplify_not-93"><span class="linenos"> 93</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="simplify_not-94"><a href="#simplify_not-94"><span class="linenos"> 94</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="simplify_not-95"><a href="#simplify_not-95"><span class="linenos"> 95</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="simplify_not-96"><a href="#simplify_not-96"><span class="linenos"> 96</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">):</span> +</span><span id="simplify_not-97"><a href="#simplify_not-97"><span class="linenos"> 97</span></a> <span class="c1"># double negation</span> +</span><span id="simplify_not-98"><a href="#simplify_not-98"><span class="linenos"> 98</span></a> <span class="c1"># NOT NOT x -> x</span> +</span><span id="simplify_not-99"><a href="#simplify_not-99"><span class="linenos"> 99</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">this</span> +</span><span id="simplify_not-100"><a href="#simplify_not-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -811,17 +813,17 @@ NOT (x AND y) -> NOT x OR NOT y</p> </div> <a class="headerlink" href="#flatten"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="flatten-105"><a href="#flatten-105"><span class="linenos">105</span></a><span class="k">def</span> <span class="nf">flatten</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="flatten-106"><a href="#flatten-106"><span class="linenos">106</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="flatten-107"><a href="#flatten-107"><span class="linenos">107</span></a><span class="sd"> A AND (B AND C) -> A AND B AND C</span> -</span><span id="flatten-108"><a href="#flatten-108"><span class="linenos">108</span></a><span class="sd"> A OR (B OR C) -> A OR B OR C</span> -</span><span id="flatten-109"><a href="#flatten-109"><span class="linenos">109</span></a><span class="sd"> """</span> -</span><span id="flatten-110"><a href="#flatten-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="flatten-111"><a href="#flatten-111"><span class="linenos">111</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="flatten-112"><a href="#flatten-112"><span class="linenos">112</span></a> <span class="n">child</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="flatten-113"><a href="#flatten-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span> -</span><span id="flatten-114"><a href="#flatten-114"><span class="linenos">114</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">child</span><span class="p">)</span> -</span><span id="flatten-115"><a href="#flatten-115"><span class="linenos">115</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="flatten-103"><a href="#flatten-103"><span class="linenos">103</span></a><span class="k">def</span> <span class="nf">flatten</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="flatten-104"><a href="#flatten-104"><span class="linenos">104</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="flatten-105"><a href="#flatten-105"><span class="linenos">105</span></a><span class="sd"> A AND (B AND C) -> A AND B AND C</span> +</span><span id="flatten-106"><a href="#flatten-106"><span class="linenos">106</span></a><span class="sd"> A OR (B OR C) -> A OR B OR C</span> +</span><span id="flatten-107"><a href="#flatten-107"><span class="linenos">107</span></a><span class="sd"> """</span> +</span><span id="flatten-108"><a href="#flatten-108"><span class="linenos">108</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="flatten-109"><a href="#flatten-109"><span class="linenos">109</span></a> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="flatten-110"><a href="#flatten-110"><span class="linenos">110</span></a> <span class="n">child</span> <span class="o">=</span> <span class="n">node</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="flatten-111"><a href="#flatten-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span> +</span><span id="flatten-112"><a href="#flatten-112"><span class="linenos">112</span></a> <span class="n">node</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">child</span><span class="p">)</span> +</span><span id="flatten-113"><a href="#flatten-113"><span class="linenos">113</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -842,42 +844,42 @@ A OR (B OR C) -> A OR B OR C</p> </div> <a class="headerlink" href="#simplify_connectors"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_connectors-118"><a href="#simplify_connectors-118"><span class="linenos">118</span></a><span class="k">def</span> <span class="nf">simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="simplify_connectors-119"><a href="#simplify_connectors-119"><span class="linenos">119</span></a> <span class="k">def</span> <span class="nf">_simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-120"><a href="#simplify_connectors-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="p">:</span> -</span><span id="simplify_connectors-121"><a href="#simplify_connectors-121"><span class="linenos">121</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="simplify_connectors-122"><a href="#simplify_connectors-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> -</span><span id="simplify_connectors-123"><a href="#simplify_connectors-123"><span class="linenos">123</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-124"><a href="#simplify_connectors-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="simplify_connectors-125"><a href="#simplify_connectors-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-126"><a href="#simplify_connectors-126"><span class="linenos">126</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="simplify_connectors-127"><a href="#simplify_connectors-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-128"><a href="#simplify_connectors-128"><span class="linenos">128</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="simplify_connectors-129"><a href="#simplify_connectors-129"><span class="linenos">129</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> -</span><span id="simplify_connectors-130"><a href="#simplify_connectors-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="n">right</span> -</span><span id="simplify_connectors-131"><a href="#simplify_connectors-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-132"><a href="#simplify_connectors-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="simplify_connectors-133"><a href="#simplify_connectors-133"><span class="linenos">133</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">)</span> -</span><span id="simplify_connectors-134"><a href="#simplify_connectors-134"><span class="linenos">134</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> -</span><span id="simplify_connectors-135"><a href="#simplify_connectors-135"><span class="linenos">135</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-136"><a href="#simplify_connectors-136"><span class="linenos">136</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="simplify_connectors-137"><a href="#simplify_connectors-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-138"><a href="#simplify_connectors-138"><span class="linenos">138</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> -</span><span id="simplify_connectors-139"><a href="#simplify_connectors-139"><span class="linenos">139</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="simplify_connectors-140"><a href="#simplify_connectors-140"><span class="linenos">140</span></a> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="simplify_connectors-141"><a href="#simplify_connectors-141"><span class="linenos">141</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="simplify_connectors-142"><a href="#simplify_connectors-142"><span class="linenos">142</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> -</span><span id="simplify_connectors-143"><a href="#simplify_connectors-143"><span class="linenos">143</span></a> <span class="p">):</span> -</span><span id="simplify_connectors-144"><a href="#simplify_connectors-144"><span class="linenos">144</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="simplify_connectors-145"><a href="#simplify_connectors-145"><span class="linenos">145</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> -</span><span id="simplify_connectors-146"><a href="#simplify_connectors-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="n">right</span> -</span><span id="simplify_connectors-147"><a href="#simplify_connectors-147"><span class="linenos">147</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> -</span><span id="simplify_connectors-148"><a href="#simplify_connectors-148"><span class="linenos">148</span></a> <span class="k">return</span> <span class="n">left</span> -</span><span id="simplify_connectors-149"><a href="#simplify_connectors-149"><span class="linenos">149</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> -</span><span id="simplify_connectors-150"><a href="#simplify_connectors-150"><span class="linenos">150</span></a> -</span><span id="simplify_connectors-151"><a href="#simplify_connectors-151"><span class="linenos">151</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="simplify_connectors-152"><a href="#simplify_connectors-152"><span class="linenos">152</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_connectors</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify_connectors-153"><a href="#simplify_connectors-153"><span class="linenos">153</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_connectors-116"><a href="#simplify_connectors-116"><span class="linenos">116</span></a><span class="k">def</span> <span class="nf">simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="simplify_connectors-117"><a href="#simplify_connectors-117"><span class="linenos">117</span></a> <span class="k">def</span> <span class="nf">_simplify_connectors</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-118"><a href="#simplify_connectors-118"><span class="linenos">118</span></a> <span class="k">if</span> <span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="p">:</span> +</span><span id="simplify_connectors-119"><a href="#simplify_connectors-119"><span class="linenos">119</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="simplify_connectors-120"><a href="#simplify_connectors-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">):</span> +</span><span id="simplify_connectors-121"><a href="#simplify_connectors-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-122"><a href="#simplify_connectors-122"><span class="linenos">122</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="simplify_connectors-123"><a href="#simplify_connectors-123"><span class="linenos">123</span></a> <span class="k">if</span> <span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-124"><a href="#simplify_connectors-124"><span class="linenos">124</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="simplify_connectors-125"><a href="#simplify_connectors-125"><span class="linenos">125</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-126"><a href="#simplify_connectors-126"><span class="linenos">126</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="simplify_connectors-127"><a href="#simplify_connectors-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> +</span><span id="simplify_connectors-128"><a href="#simplify_connectors-128"><span class="linenos">128</span></a> <span class="k">return</span> <span class="n">right</span> +</span><span id="simplify_connectors-129"><a href="#simplify_connectors-129"><span class="linenos">129</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-130"><a href="#simplify_connectors-130"><span class="linenos">130</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="simplify_connectors-131"><a href="#simplify_connectors-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">)</span> +</span><span id="simplify_connectors-132"><a href="#simplify_connectors-132"><span class="linenos">132</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span><span class="p">):</span> +</span><span id="simplify_connectors-133"><a href="#simplify_connectors-133"><span class="linenos">133</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">or</span> <span class="n">always_true</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-134"><a href="#simplify_connectors-134"><span class="linenos">134</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="simplify_connectors-135"><a href="#simplify_connectors-135"><span class="linenos">135</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-136"><a href="#simplify_connectors-136"><span class="linenos">136</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> +</span><span id="simplify_connectors-137"><a href="#simplify_connectors-137"><span class="linenos">137</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="simplify_connectors-138"><a href="#simplify_connectors-138"><span class="linenos">138</span></a> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="simplify_connectors-139"><a href="#simplify_connectors-139"><span class="linenos">139</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_null</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="simplify_connectors-140"><a href="#simplify_connectors-140"><span class="linenos">140</span></a> <span class="ow">or</span> <span class="p">(</span><span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">)</span> <span class="ow">and</span> <span class="n">is_null</span><span class="p">(</span><span class="n">right</span><span class="p">))</span> +</span><span id="simplify_connectors-141"><a href="#simplify_connectors-141"><span class="linenos">141</span></a> <span class="p">):</span> +</span><span id="simplify_connectors-142"><a href="#simplify_connectors-142"><span class="linenos">142</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> +</span><span id="simplify_connectors-143"><a href="#simplify_connectors-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">left</span><span class="p">):</span> +</span><span id="simplify_connectors-144"><a href="#simplify_connectors-144"><span class="linenos">144</span></a> <span class="k">return</span> <span class="n">right</span> +</span><span id="simplify_connectors-145"><a href="#simplify_connectors-145"><span class="linenos">145</span></a> <span class="k">if</span> <span class="n">is_false</span><span class="p">(</span><span class="n">right</span><span class="p">):</span> +</span><span id="simplify_connectors-146"><a href="#simplify_connectors-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="n">left</span> +</span><span id="simplify_connectors-147"><a href="#simplify_connectors-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="n">_simplify_comparison</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">left</span><span class="p">,</span> <span class="n">right</span><span class="p">,</span> <span class="n">or_</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> +</span><span id="simplify_connectors-148"><a href="#simplify_connectors-148"><span class="linenos">148</span></a> +</span><span id="simplify_connectors-149"><a href="#simplify_connectors-149"><span class="linenos">149</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="simplify_connectors-150"><a href="#simplify_connectors-150"><span class="linenos">150</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_connectors</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify_connectors-151"><a href="#simplify_connectors-151"><span class="linenos">151</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -895,20 +897,20 @@ A OR (B OR C) -> A OR B OR C</p> </div> <a class="headerlink" href="#remove_compliments"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="remove_compliments-235"><a href="#remove_compliments-235"><span class="linenos">235</span></a><span class="k">def</span> <span class="nf">remove_compliments</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="remove_compliments-236"><a href="#remove_compliments-236"><span class="linenos">236</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="remove_compliments-237"><a href="#remove_compliments-237"><span class="linenos">237</span></a><span class="sd"> Removing compliments.</span> -</span><span id="remove_compliments-238"><a href="#remove_compliments-238"><span class="linenos">238</span></a> -</span><span id="remove_compliments-239"><a href="#remove_compliments-239"><span class="linenos">239</span></a><span class="sd"> A AND NOT A -> FALSE</span> -</span><span id="remove_compliments-240"><a href="#remove_compliments-240"><span class="linenos">240</span></a><span class="sd"> A OR NOT A -> TRUE</span> -</span><span id="remove_compliments-241"><a href="#remove_compliments-241"><span class="linenos">241</span></a><span class="sd"> """</span> -</span><span id="remove_compliments-242"><a href="#remove_compliments-242"><span class="linenos">242</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="remove_compliments-243"><a href="#remove_compliments-243"><span class="linenos">243</span></a> <span class="n">compliment</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> -</span><span id="remove_compliments-244"><a href="#remove_compliments-244"><span class="linenos">244</span></a> -</span><span id="remove_compliments-245"><a href="#remove_compliments-245"><span class="linenos">245</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> -</span><span id="remove_compliments-246"><a href="#remove_compliments-246"><span class="linenos">246</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="remove_compliments-247"><a href="#remove_compliments-247"><span class="linenos">247</span></a> <span class="k">return</span> <span class="n">compliment</span> -</span><span id="remove_compliments-248"><a href="#remove_compliments-248"><span class="linenos">248</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="remove_compliments-233"><a href="#remove_compliments-233"><span class="linenos">233</span></a><span class="k">def</span> <span class="nf">remove_compliments</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="remove_compliments-234"><a href="#remove_compliments-234"><span class="linenos">234</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="remove_compliments-235"><a href="#remove_compliments-235"><span class="linenos">235</span></a><span class="sd"> Removing compliments.</span> +</span><span id="remove_compliments-236"><a href="#remove_compliments-236"><span class="linenos">236</span></a> +</span><span id="remove_compliments-237"><a href="#remove_compliments-237"><span class="linenos">237</span></a><span class="sd"> A AND NOT A -> FALSE</span> +</span><span id="remove_compliments-238"><a href="#remove_compliments-238"><span class="linenos">238</span></a><span class="sd"> A OR NOT A -> TRUE</span> +</span><span id="remove_compliments-239"><a href="#remove_compliments-239"><span class="linenos">239</span></a><span class="sd"> """</span> +</span><span id="remove_compliments-240"><a href="#remove_compliments-240"><span class="linenos">240</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="remove_compliments-241"><a href="#remove_compliments-241"><span class="linenos">241</span></a> <span class="n">compliment</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> +</span><span id="remove_compliments-242"><a href="#remove_compliments-242"><span class="linenos">242</span></a> +</span><span id="remove_compliments-243"><a href="#remove_compliments-243"><span class="linenos">243</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> +</span><span id="remove_compliments-244"><a href="#remove_compliments-244"><span class="linenos">244</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="remove_compliments-245"><a href="#remove_compliments-245"><span class="linenos">245</span></a> <span class="k">return</span> <span class="n">compliment</span> +</span><span id="remove_compliments-246"><a href="#remove_compliments-246"><span class="linenos">246</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -925,36 +927,36 @@ A OR NOT A -> TRUE</p> <div class="attr function"> <span class="def">def</span> - <span class="name">uniq_sort</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">cache</span><span class="o">=</span><span class="kc">None</span>, </span><span class="param"><span class="n">root</span><span class="o">=</span><span class="kc">True</span></span><span class="return-annotation">):</span></span> + <span class="name">uniq_sort</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">generate</span>, </span><span class="param"><span class="n">root</span><span class="o">=</span><span class="kc">True</span></span><span class="return-annotation">):</span></span> <label class="view-source-button" for="uniq_sort-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#uniq_sort"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="uniq_sort-251"><a href="#uniq_sort-251"><span class="linenos">251</span></a><span class="k">def</span> <span class="nf">uniq_sort</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">cache</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="uniq_sort-252"><a href="#uniq_sort-252"><span class="linenos">252</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="uniq_sort-253"><a href="#uniq_sort-253"><span class="linenos">253</span></a><span class="sd"> Uniq and sort a connector.</span> -</span><span id="uniq_sort-254"><a href="#uniq_sort-254"><span class="linenos">254</span></a> -</span><span id="uniq_sort-255"><a href="#uniq_sort-255"><span class="linenos">255</span></a><span class="sd"> C AND A AND B AND B -> A AND B AND C</span> -</span><span id="uniq_sort-256"><a href="#uniq_sort-256"><span class="linenos">256</span></a><span class="sd"> """</span> -</span><span id="uniq_sort-257"><a href="#uniq_sort-257"><span class="linenos">257</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="uniq_sort-258"><a href="#uniq_sort-258"><span class="linenos">258</span></a> <span class="n">result_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> -</span><span id="uniq_sort-259"><a href="#uniq_sort-259"><span class="linenos">259</span></a> <span class="n">flattened</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> -</span><span id="uniq_sort-260"><a href="#uniq_sort-260"><span class="linenos">260</span></a> <span class="n">deduped</span> <span class="o">=</span> <span class="p">{</span><span class="n">GENERATOR</span><span class="o">.</span><span class="n">generate</span><span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">cache</span><span class="p">):</span> <span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">flattened</span><span class="p">}</span> -</span><span id="uniq_sort-261"><a href="#uniq_sort-261"><span class="linenos">261</span></a> <span class="n">arr</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">deduped</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> -</span><span id="uniq_sort-262"><a href="#uniq_sort-262"><span class="linenos">262</span></a> -</span><span id="uniq_sort-263"><a href="#uniq_sort-263"><span class="linenos">263</span></a> <span class="c1"># check if the operands are already sorted, if not sort them</span> -</span><span id="uniq_sort-264"><a href="#uniq_sort-264"><span class="linenos">264</span></a> <span class="c1"># A AND C AND B -> A AND B AND C</span> -</span><span id="uniq_sort-265"><a href="#uniq_sort-265"><span class="linenos">265</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">arr</span><span class="p">[</span><span class="mi">1</span><span class="p">:]):</span> -</span><span id="uniq_sort-266"><a href="#uniq_sort-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="n">sql</span> <span class="o"><</span> <span class="n">arr</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="mi">0</span><span class="p">]:</span> -</span><span id="uniq_sort-267"><a href="#uniq_sort-267"><span class="linenos">267</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="p">(</span><span class="n">e</span> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">arr</span><span class="p">)),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="uniq_sort-268"><a href="#uniq_sort-268"><span class="linenos">268</span></a> <span class="k">break</span> -</span><span id="uniq_sort-269"><a href="#uniq_sort-269"><span class="linenos">269</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="uniq_sort-270"><a href="#uniq_sort-270"><span class="linenos">270</span></a> <span class="c1"># we didn't have to sort but maybe we need to dedup</span> -</span><span id="uniq_sort-271"><a href="#uniq_sort-271"><span class="linenos">271</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">deduped</span><span class="p">)</span> <span class="o"><</span> <span class="nb">len</span><span class="p">(</span><span class="n">flattened</span><span class="p">):</span> -</span><span id="uniq_sort-272"><a href="#uniq_sort-272"><span class="linenos">272</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="n">deduped</span><span class="o">.</span><span class="n">values</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="uniq_sort-273"><a href="#uniq_sort-273"><span class="linenos">273</span></a> -</span><span id="uniq_sort-274"><a href="#uniq_sort-274"><span class="linenos">274</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="uniq_sort-249"><a href="#uniq_sort-249"><span class="linenos">249</span></a><span class="k">def</span> <span class="nf">uniq_sort</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">generate</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="uniq_sort-250"><a href="#uniq_sort-250"><span class="linenos">250</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="uniq_sort-251"><a href="#uniq_sort-251"><span class="linenos">251</span></a><span class="sd"> Uniq and sort a connector.</span> +</span><span id="uniq_sort-252"><a href="#uniq_sort-252"><span class="linenos">252</span></a> +</span><span id="uniq_sort-253"><a href="#uniq_sort-253"><span class="linenos">253</span></a><span class="sd"> C AND A AND B AND B -> A AND B AND C</span> +</span><span id="uniq_sort-254"><a href="#uniq_sort-254"><span class="linenos">254</span></a><span class="sd"> """</span> +</span><span id="uniq_sort-255"><a href="#uniq_sort-255"><span class="linenos">255</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="uniq_sort-256"><a href="#uniq_sort-256"><span class="linenos">256</span></a> <span class="n">result_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">and_</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">or_</span> +</span><span id="uniq_sort-257"><a href="#uniq_sort-257"><span class="linenos">257</span></a> <span class="n">flattened</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> +</span><span id="uniq_sort-258"><a href="#uniq_sort-258"><span class="linenos">258</span></a> <span class="n">deduped</span> <span class="o">=</span> <span class="p">{</span><span class="n">generate</span><span class="p">(</span><span class="n">e</span><span class="p">):</span> <span class="n">e</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">flattened</span><span class="p">}</span> +</span><span id="uniq_sort-259"><a href="#uniq_sort-259"><span class="linenos">259</span></a> <span class="n">arr</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">deduped</span><span class="o">.</span><span class="n">items</span><span class="p">())</span> +</span><span id="uniq_sort-260"><a href="#uniq_sort-260"><span class="linenos">260</span></a> +</span><span id="uniq_sort-261"><a href="#uniq_sort-261"><span class="linenos">261</span></a> <span class="c1"># check if the operands are already sorted, if not sort them</span> +</span><span id="uniq_sort-262"><a href="#uniq_sort-262"><span class="linenos">262</span></a> <span class="c1"># A AND C AND B -> A AND B AND C</span> +</span><span id="uniq_sort-263"><a href="#uniq_sort-263"><span class="linenos">263</span></a> <span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="p">(</span><span class="n">sql</span><span class="p">,</span> <span class="n">e</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">arr</span><span class="p">[</span><span class="mi">1</span><span class="p">:]):</span> +</span><span id="uniq_sort-264"><a href="#uniq_sort-264"><span class="linenos">264</span></a> <span class="k">if</span> <span class="n">sql</span> <span class="o"><</span> <span class="n">arr</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="mi">0</span><span class="p">]:</span> +</span><span id="uniq_sort-265"><a href="#uniq_sort-265"><span class="linenos">265</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="p">(</span><span class="n">e</span> <span class="k">for</span> <span class="n">_</span><span class="p">,</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">arr</span><span class="p">)),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="uniq_sort-266"><a href="#uniq_sort-266"><span class="linenos">266</span></a> <span class="k">break</span> +</span><span id="uniq_sort-267"><a href="#uniq_sort-267"><span class="linenos">267</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="uniq_sort-268"><a href="#uniq_sort-268"><span class="linenos">268</span></a> <span class="c1"># we didn't have to sort but maybe we need to dedup</span> +</span><span id="uniq_sort-269"><a href="#uniq_sort-269"><span class="linenos">269</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">deduped</span><span class="p">)</span> <span class="o"><</span> <span class="nb">len</span><span class="p">(</span><span class="n">flattened</span><span class="p">):</span> +</span><span id="uniq_sort-270"><a href="#uniq_sort-270"><span class="linenos">270</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">result_func</span><span class="p">(</span><span class="o">*</span><span class="n">deduped</span><span class="o">.</span><span class="n">values</span><span class="p">(),</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="uniq_sort-271"><a href="#uniq_sort-271"><span class="linenos">271</span></a> +</span><span id="uniq_sort-272"><a href="#uniq_sort-272"><span class="linenos">272</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -976,44 +978,44 @@ A OR NOT A -> TRUE</p> </div> <a class="headerlink" href="#absorb_and_eliminate"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="absorb_and_eliminate-277"><a href="#absorb_and_eliminate-277"><span class="linenos">277</span></a><span class="k">def</span> <span class="nf">absorb_and_eliminate</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-278"><a href="#absorb_and_eliminate-278"><span class="linenos">278</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="absorb_and_eliminate-279"><a href="#absorb_and_eliminate-279"><span class="linenos">279</span></a><span class="sd"> absorption:</span> -</span><span id="absorb_and_eliminate-280"><a href="#absorb_and_eliminate-280"><span class="linenos">280</span></a><span class="sd"> A AND (A OR B) -> A</span> -</span><span id="absorb_and_eliminate-281"><a href="#absorb_and_eliminate-281"><span class="linenos">281</span></a><span class="sd"> A OR (A AND B) -> A</span> -</span><span id="absorb_and_eliminate-282"><a href="#absorb_and_eliminate-282"><span class="linenos">282</span></a><span class="sd"> A AND (NOT A OR B) -> A AND B</span> -</span><span id="absorb_and_eliminate-283"><a href="#absorb_and_eliminate-283"><span class="linenos">283</span></a><span class="sd"> A OR (NOT A AND B) -> A OR B</span> -</span><span id="absorb_and_eliminate-284"><a href="#absorb_and_eliminate-284"><span class="linenos">284</span></a><span class="sd"> elimination:</span> -</span><span id="absorb_and_eliminate-285"><a href="#absorb_and_eliminate-285"><span class="linenos">285</span></a><span class="sd"> (A AND B) OR (A AND NOT B) -> A</span> -</span><span id="absorb_and_eliminate-286"><a href="#absorb_and_eliminate-286"><span class="linenos">286</span></a><span class="sd"> (A OR B) AND (A OR NOT B) -> A</span> -</span><span id="absorb_and_eliminate-287"><a href="#absorb_and_eliminate-287"><span class="linenos">287</span></a><span class="sd"> """</span> -</span><span id="absorb_and_eliminate-288"><a href="#absorb_and_eliminate-288"><span class="linenos">288</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-289"><a href="#absorb_and_eliminate-289"><span class="linenos">289</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> -</span><span id="absorb_and_eliminate-290"><a href="#absorb_and_eliminate-290"><span class="linenos">290</span></a> -</span><span id="absorb_and_eliminate-291"><a href="#absorb_and_eliminate-291"><span class="linenos">291</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-292"><a href="#absorb_and_eliminate-292"><span class="linenos">292</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-293"><a href="#absorb_and_eliminate-293"><span class="linenos">293</span></a> <span class="n">aa</span><span class="p">,</span> <span class="n">ab</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="absorb_and_eliminate-294"><a href="#absorb_and_eliminate-294"><span class="linenos">294</span></a> -</span><span id="absorb_and_eliminate-295"><a href="#absorb_and_eliminate-295"><span class="linenos">295</span></a> <span class="c1"># absorb</span> -</span><span id="absorb_and_eliminate-296"><a href="#absorb_and_eliminate-296"><span class="linenos">296</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">aa</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-297"><a href="#absorb_and_eliminate-297"><span class="linenos">297</span></a> <span class="n">aa</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> -</span><span id="absorb_and_eliminate-298"><a href="#absorb_and_eliminate-298"><span class="linenos">298</span></a> <span class="k">elif</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">ab</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-299"><a href="#absorb_and_eliminate-299"><span class="linenos">299</span></a> <span class="n">ab</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> -</span><span id="absorb_and_eliminate-300"><a href="#absorb_and_eliminate-300"><span class="linenos">300</span></a> <span class="k">elif</span> <span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span><span class="n">b</span><span class="p">})</span> <span class="o"><</span> <span class="nb">set</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">flatten</span><span class="p">()):</span> -</span><span id="absorb_and_eliminate-301"><a href="#absorb_and_eliminate-301"><span class="linenos">301</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> -</span><span id="absorb_and_eliminate-302"><a href="#absorb_and_eliminate-302"><span class="linenos">302</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> -</span><span id="absorb_and_eliminate-303"><a href="#absorb_and_eliminate-303"><span class="linenos">303</span></a> <span class="c1"># eliminate</span> -</span><span id="absorb_and_eliminate-304"><a href="#absorb_and_eliminate-304"><span class="linenos">304</span></a> <span class="n">rhs</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> -</span><span id="absorb_and_eliminate-305"><a href="#absorb_and_eliminate-305"><span class="linenos">305</span></a> <span class="n">ba</span><span class="p">,</span> <span class="n">bb</span> <span class="o">=</span> <span class="n">rhs</span> -</span><span id="absorb_and_eliminate-306"><a href="#absorb_and_eliminate-306"><span class="linenos">306</span></a> -</span><span id="absorb_and_eliminate-307"><a href="#absorb_and_eliminate-307"><span class="linenos">307</span></a> <span class="k">if</span> <span class="n">aa</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> -</span><span id="absorb_and_eliminate-308"><a href="#absorb_and_eliminate-308"><span class="linenos">308</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> -</span><span id="absorb_and_eliminate-309"><a href="#absorb_and_eliminate-309"><span class="linenos">309</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> -</span><span id="absorb_and_eliminate-310"><a href="#absorb_and_eliminate-310"><span class="linenos">310</span></a> <span class="k">elif</span> <span class="n">ab</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> -</span><span id="absorb_and_eliminate-311"><a href="#absorb_and_eliminate-311"><span class="linenos">311</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> -</span><span id="absorb_and_eliminate-312"><a href="#absorb_and_eliminate-312"><span class="linenos">312</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> -</span><span id="absorb_and_eliminate-313"><a href="#absorb_and_eliminate-313"><span class="linenos">313</span></a> -</span><span id="absorb_and_eliminate-314"><a href="#absorb_and_eliminate-314"><span class="linenos">314</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="absorb_and_eliminate-275"><a href="#absorb_and_eliminate-275"><span class="linenos">275</span></a><span class="k">def</span> <span class="nf">absorb_and_eliminate</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-276"><a href="#absorb_and_eliminate-276"><span class="linenos">276</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="absorb_and_eliminate-277"><a href="#absorb_and_eliminate-277"><span class="linenos">277</span></a><span class="sd"> absorption:</span> +</span><span id="absorb_and_eliminate-278"><a href="#absorb_and_eliminate-278"><span class="linenos">278</span></a><span class="sd"> A AND (A OR B) -> A</span> +</span><span id="absorb_and_eliminate-279"><a href="#absorb_and_eliminate-279"><span class="linenos">279</span></a><span class="sd"> A OR (A AND B) -> A</span> +</span><span id="absorb_and_eliminate-280"><a href="#absorb_and_eliminate-280"><span class="linenos">280</span></a><span class="sd"> A AND (NOT A OR B) -> A AND B</span> +</span><span id="absorb_and_eliminate-281"><a href="#absorb_and_eliminate-281"><span class="linenos">281</span></a><span class="sd"> A OR (NOT A AND B) -> A OR B</span> +</span><span id="absorb_and_eliminate-282"><a href="#absorb_and_eliminate-282"><span class="linenos">282</span></a><span class="sd"> elimination:</span> +</span><span id="absorb_and_eliminate-283"><a href="#absorb_and_eliminate-283"><span class="linenos">283</span></a><span class="sd"> (A AND B) OR (A AND NOT B) -> A</span> +</span><span id="absorb_and_eliminate-284"><a href="#absorb_and_eliminate-284"><span class="linenos">284</span></a><span class="sd"> (A OR B) AND (A OR NOT B) -> A</span> +</span><span id="absorb_and_eliminate-285"><a href="#absorb_and_eliminate-285"><span class="linenos">285</span></a><span class="sd"> """</span> +</span><span id="absorb_and_eliminate-286"><a href="#absorb_and_eliminate-286"><span class="linenos">286</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="n">root</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">expression</span><span class="o">.</span><span class="n">same_parent</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-287"><a href="#absorb_and_eliminate-287"><span class="linenos">287</span></a> <span class="n">kind</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Or</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span><span class="p">)</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> +</span><span id="absorb_and_eliminate-288"><a href="#absorb_and_eliminate-288"><span class="linenos">288</span></a> +</span><span id="absorb_and_eliminate-289"><a href="#absorb_and_eliminate-289"><span class="linenos">289</span></a> <span class="k">for</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">permutations</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">flatten</span><span class="p">(),</span> <span class="mi">2</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-290"><a href="#absorb_and_eliminate-290"><span class="linenos">290</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-291"><a href="#absorb_and_eliminate-291"><span class="linenos">291</span></a> <span class="n">aa</span><span class="p">,</span> <span class="n">ab</span> <span class="o">=</span> <span class="n">a</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="absorb_and_eliminate-292"><a href="#absorb_and_eliminate-292"><span class="linenos">292</span></a> +</span><span id="absorb_and_eliminate-293"><a href="#absorb_and_eliminate-293"><span class="linenos">293</span></a> <span class="c1"># absorb</span> +</span><span id="absorb_and_eliminate-294"><a href="#absorb_and_eliminate-294"><span class="linenos">294</span></a> <span class="k">if</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">aa</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-295"><a href="#absorb_and_eliminate-295"><span class="linenos">295</span></a> <span class="n">aa</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> +</span><span id="absorb_and_eliminate-296"><a href="#absorb_and_eliminate-296"><span class="linenos">296</span></a> <span class="k">elif</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">ab</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-297"><a href="#absorb_and_eliminate-297"><span class="linenos">297</span></a> <span class="n">ab</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">())</span> +</span><span id="absorb_and_eliminate-298"><a href="#absorb_and_eliminate-298"><span class="linenos">298</span></a> <span class="k">elif</span> <span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">b</span><span class="o">.</span><span class="n">flatten</span><span class="p">())</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span><span class="n">b</span><span class="p">})</span> <span class="o"><</span> <span class="nb">set</span><span class="p">(</span><span class="n">a</span><span class="o">.</span><span class="n">flatten</span><span class="p">()):</span> +</span><span id="absorb_and_eliminate-299"><a href="#absorb_and_eliminate-299"><span class="linenos">299</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> <span class="k">if</span> <span class="n">kind</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">And</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">())</span> +</span><span id="absorb_and_eliminate-300"><a href="#absorb_and_eliminate-300"><span class="linenos">300</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">kind</span><span class="p">):</span> +</span><span id="absorb_and_eliminate-301"><a href="#absorb_and_eliminate-301"><span class="linenos">301</span></a> <span class="c1"># eliminate</span> +</span><span id="absorb_and_eliminate-302"><a href="#absorb_and_eliminate-302"><span class="linenos">302</span></a> <span class="n">rhs</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">unnest_operands</span><span class="p">()</span> +</span><span id="absorb_and_eliminate-303"><a href="#absorb_and_eliminate-303"><span class="linenos">303</span></a> <span class="n">ba</span><span class="p">,</span> <span class="n">bb</span> <span class="o">=</span> <span class="n">rhs</span> +</span><span id="absorb_and_eliminate-304"><a href="#absorb_and_eliminate-304"><span class="linenos">304</span></a> +</span><span id="absorb_and_eliminate-305"><a href="#absorb_and_eliminate-305"><span class="linenos">305</span></a> <span class="k">if</span> <span class="n">aa</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">ab</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> +</span><span id="absorb_and_eliminate-306"><a href="#absorb_and_eliminate-306"><span class="linenos">306</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> +</span><span id="absorb_and_eliminate-307"><a href="#absorb_and_eliminate-307"><span class="linenos">307</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">aa</span><span class="p">)</span> +</span><span id="absorb_and_eliminate-308"><a href="#absorb_and_eliminate-308"><span class="linenos">308</span></a> <span class="k">elif</span> <span class="n">ab</span> <span class="ow">in</span> <span class="n">rhs</span> <span class="ow">and</span> <span class="p">(</span><span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">ba</span><span class="p">)</span> <span class="ow">or</span> <span class="n">is_complement</span><span class="p">(</span><span class="n">aa</span><span class="p">,</span> <span class="n">bb</span><span class="p">)):</span> +</span><span id="absorb_and_eliminate-309"><a href="#absorb_and_eliminate-309"><span class="linenos">309</span></a> <span class="n">a</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> +</span><span id="absorb_and_eliminate-310"><a href="#absorb_and_eliminate-310"><span class="linenos">310</span></a> <span class="n">b</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span> +</span><span id="absorb_and_eliminate-311"><a href="#absorb_and_eliminate-311"><span class="linenos">311</span></a> +</span><span id="absorb_and_eliminate-312"><a href="#absorb_and_eliminate-312"><span class="linenos">312</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -1040,18 +1042,18 @@ elimination: </div> <a class="headerlink" href="#simplify_literals"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_literals-317"><a href="#simplify_literals-317"><span class="linenos">317</span></a><span class="k">def</span> <span class="nf">simplify_literals</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> -</span><span id="simplify_literals-318"><a href="#simplify_literals-318"><span class="linenos">318</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> -</span><span id="simplify_literals-319"><a href="#simplify_literals-319"><span class="linenos">319</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_binary</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> -</span><span id="simplify_literals-320"><a href="#simplify_literals-320"><span class="linenos">320</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Neg</span><span class="p">):</span> -</span><span id="simplify_literals-321"><a href="#simplify_literals-321"><span class="linenos">321</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> -</span><span id="simplify_literals-322"><a href="#simplify_literals-322"><span class="linenos">322</span></a> <span class="k">if</span> <span class="n">this</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> -</span><span id="simplify_literals-323"><a href="#simplify_literals-323"><span class="linenos">323</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">this</span><span class="o">.</span><span class="n">name</span> -</span><span id="simplify_literals-324"><a href="#simplify_literals-324"><span class="linenos">324</span></a> <span class="k">if</span> <span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"-"</span><span class="p">:</span> -</span><span id="simplify_literals-325"><a href="#simplify_literals-325"><span class="linenos">325</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> -</span><span id="simplify_literals-326"><a href="#simplify_literals-326"><span class="linenos">326</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="sa">f</span><span class="s2">"-</span><span class="si">{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="simplify_literals-327"><a href="#simplify_literals-327"><span class="linenos">327</span></a> -</span><span id="simplify_literals-328"><a href="#simplify_literals-328"><span class="linenos">328</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_literals-315"><a href="#simplify_literals-315"><span class="linenos">315</span></a><span class="k">def</span> <span class="nf">simplify_literals</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> +</span><span id="simplify_literals-316"><a href="#simplify_literals-316"><span class="linenos">316</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Connector</span><span class="p">):</span> +</span><span id="simplify_literals-317"><a href="#simplify_literals-317"><span class="linenos">317</span></a> <span class="k">return</span> <span class="n">_flat_simplify</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">_simplify_binary</span><span class="p">,</span> <span class="n">root</span><span class="p">)</span> +</span><span id="simplify_literals-318"><a href="#simplify_literals-318"><span class="linenos">318</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Neg</span><span class="p">):</span> +</span><span id="simplify_literals-319"><a href="#simplify_literals-319"><span class="linenos">319</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="simplify_literals-320"><a href="#simplify_literals-320"><span class="linenos">320</span></a> <span class="k">if</span> <span class="n">this</span><span class="o">.</span><span class="n">is_number</span><span class="p">:</span> +</span><span id="simplify_literals-321"><a href="#simplify_literals-321"><span class="linenos">321</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">this</span><span class="o">.</span><span class="n">name</span> +</span><span id="simplify_literals-322"><a href="#simplify_literals-322"><span class="linenos">322</span></a> <span class="k">if</span> <span class="n">value</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"-"</span><span class="p">:</span> +</span><span id="simplify_literals-323"><a href="#simplify_literals-323"><span class="linenos">323</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="n">value</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span> +</span><span id="simplify_literals-324"><a href="#simplify_literals-324"><span class="linenos">324</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">number</span><span class="p">(</span><span class="sa">f</span><span class="s2">"-</span><span class="si">{</span><span class="n">value</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="simplify_literals-325"><a href="#simplify_literals-325"><span class="linenos">325</span></a> +</span><span id="simplify_literals-326"><a href="#simplify_literals-326"><span class="linenos">326</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -1069,18 +1071,22 @@ elimination: </div> <a class="headerlink" href="#simplify_parens"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_parens-391"><a href="#simplify_parens-391"><span class="linenos">391</span></a><span class="k">def</span> <span class="nf">simplify_parens</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="simplify_parens-392"><a href="#simplify_parens-392"><span class="linenos">392</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="simplify_parens-393"><a href="#simplify_parens-393"><span class="linenos">393</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">)</span> -</span><span id="simplify_parens-394"><a href="#simplify_parens-394"><span class="linenos">394</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="simplify_parens-395"><a href="#simplify_parens-395"><span class="linenos">395</span></a> <span class="ow">and</span> <span class="p">(</span> -</span><span id="simplify_parens-396"><a href="#simplify_parens-396"><span class="linenos">396</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">))</span> -</span><span id="simplify_parens-397"><a href="#simplify_parens-397"><span class="linenos">397</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">)</span> -</span><span id="simplify_parens-398"><a href="#simplify_parens-398"><span class="linenos">398</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> -</span><span id="simplify_parens-399"><a href="#simplify_parens-399"><span class="linenos">399</span></a> <span class="p">)</span> -</span><span id="simplify_parens-400"><a href="#simplify_parens-400"><span class="linenos">400</span></a> <span class="p">):</span> -</span><span id="simplify_parens-401"><a href="#simplify_parens-401"><span class="linenos">401</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> -</span><span id="simplify_parens-402"><a href="#simplify_parens-402"><span class="linenos">402</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="simplify_parens-389"><a href="#simplify_parens-389"><span class="linenos">389</span></a><span class="k">def</span> <span class="nf">simplify_parens</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="simplify_parens-390"><a href="#simplify_parens-390"><span class="linenos">390</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Paren</span><span class="p">):</span> +</span><span id="simplify_parens-391"><a href="#simplify_parens-391"><span class="linenos">391</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="simplify_parens-392"><a href="#simplify_parens-392"><span class="linenos">392</span></a> +</span><span id="simplify_parens-393"><a href="#simplify_parens-393"><span class="linenos">393</span></a> <span class="n">this</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="simplify_parens-394"><a href="#simplify_parens-394"><span class="linenos">394</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="simplify_parens-395"><a href="#simplify_parens-395"><span class="linenos">395</span></a> +</span><span id="simplify_parens-396"><a href="#simplify_parens-396"><span class="linenos">396</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span> +</span><span id="simplify_parens-397"><a href="#simplify_parens-397"><span class="linenos">397</span></a> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Condition</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">))</span> +</span><span id="simplify_parens-398"><a href="#simplify_parens-398"><span class="linenos">398</span></a> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Predicate</span><span class="p">)</span> +</span><span id="simplify_parens-399"><a href="#simplify_parens-399"><span class="linenos">399</span></a> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Binary</span><span class="p">)</span> +</span><span id="simplify_parens-400"><a href="#simplify_parens-400"><span class="linenos">400</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Add</span><span class="p">))</span> +</span><span id="simplify_parens-401"><a href="#simplify_parens-401"><span class="linenos">401</span></a> <span class="ow">or</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Mul</span><span class="p">))</span> +</span><span id="simplify_parens-402"><a href="#simplify_parens-402"><span class="linenos">402</span></a> <span class="p">):</span> +</span><span id="simplify_parens-403"><a href="#simplify_parens-403"><span class="linenos">403</span></a> <span class="k">return</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span> +</span><span id="simplify_parens-404"><a href="#simplify_parens-404"><span class="linenos">404</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -1098,14 +1104,14 @@ elimination: </div> <a class="headerlink" href="#remove_where_true"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="remove_where_true-405"><a href="#remove_where_true-405"><span class="linenos">405</span></a><span class="k">def</span> <span class="nf">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="remove_where_true-406"><a href="#remove_where_true-406"><span class="linenos">406</span></a> <span class="k">for</span> <span class="n">where</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">):</span> -</span><span id="remove_where_true-407"><a href="#remove_where_true-407"><span class="linenos">407</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> -</span><span id="remove_where_true-408"><a href="#remove_where_true-408"><span class="linenos">408</span></a> <span class="n">where</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> -</span><span id="remove_where_true-409"><a href="#remove_where_true-409"><span class="linenos">409</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="remove_where_true-410"><a href="#remove_where_true-410"><span class="linenos">410</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)):</span> -</span><span id="remove_where_true-411"><a href="#remove_where_true-411"><span class="linenos">411</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> -</span><span id="remove_where_true-412"><a href="#remove_where_true-412"><span class="linenos">412</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="remove_where_true-407"><a href="#remove_where_true-407"><span class="linenos">407</span></a><span class="k">def</span> <span class="nf">remove_where_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="remove_where_true-408"><a href="#remove_where_true-408"><span class="linenos">408</span></a> <span class="k">for</span> <span class="n">where</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">):</span> +</span><span id="remove_where_true-409"><a href="#remove_where_true-409"><span class="linenos">409</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">):</span> +</span><span id="remove_where_true-410"><a href="#remove_where_true-410"><span class="linenos">410</span></a> <span class="n">where</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> +</span><span id="remove_where_true-411"><a href="#remove_where_true-411"><span class="linenos">411</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="remove_where_true-412"><a href="#remove_where_true-412"><span class="linenos">412</span></a> <span class="k">if</span> <span class="n">always_true</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)):</span> +</span><span id="remove_where_true-413"><a href="#remove_where_true-413"><span class="linenos">413</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"kind"</span><span class="p">,</span> <span class="s2">"CROSS"</span><span class="p">)</span> +</span><span id="remove_where_true-414"><a href="#remove_where_true-414"><span class="linenos">414</span></a> <span class="n">join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> </span></pre></div> @@ -1123,10 +1129,10 @@ elimination: </div> <a class="headerlink" href="#always_true"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="always_true-415"><a href="#always_true-415"><span class="linenos">415</span></a><span class="k">def</span> <span class="nf">always_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="always_true-416"><a href="#always_true-416"><span class="linenos">416</span></a> <span class="k">return</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span> -</span><span id="always_true-417"><a href="#always_true-417"><span class="linenos">417</span></a> <span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span> -</span><span id="always_true-418"><a href="#always_true-418"><span class="linenos">418</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="always_true-417"><a href="#always_true-417"><span class="linenos">417</span></a><span class="k">def</span> <span class="nf">always_true</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="always_true-418"><a href="#always_true-418"><span class="linenos">418</span></a> <span class="k">return</span> <span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span><span class="p">)</span> <span class="ow">and</span> <span class="n">expression</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="ow">or</span> <span class="nb">isinstance</span><span class="p">(</span> +</span><span id="always_true-419"><a href="#always_true-419"><span class="linenos">419</span></a> <span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span> +</span><span id="always_true-420"><a href="#always_true-420"><span class="linenos">420</span></a> <span class="p">)</span> </span></pre></div> @@ -1144,8 +1150,8 @@ elimination: </div> <a class="headerlink" href="#is_complement"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="is_complement-421"><a href="#is_complement-421"><span class="linenos">421</span></a><span class="k">def</span> <span class="nf">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="is_complement-422"><a href="#is_complement-422"><span class="linenos">422</span></a> <span class="k">return</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">)</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">a</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="is_complement-423"><a href="#is_complement-423"><span class="linenos">423</span></a><span class="k">def</span> <span class="nf">is_complement</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="is_complement-424"><a href="#is_complement-424"><span class="linenos">424</span></a> <span class="k">return</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Not</span><span class="p">)</span> <span class="ow">and</span> <span class="n">b</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">a</span> </span></pre></div> @@ -1163,8 +1169,8 @@ elimination: </div> <a class="headerlink" href="#is_false"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="is_false-425"><a href="#is_false-425"><span class="linenos">425</span></a><span class="k">def</span> <span class="nf">is_false</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> -</span><span id="is_false-426"><a href="#is_false-426"><span class="linenos">426</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="is_false-427"><a href="#is_false-427"><span class="linenos">427</span></a><span class="k">def</span> <span class="nf">is_false</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> +</span><span id="is_false-428"><a href="#is_false-428"><span class="linenos">428</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Boolean</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">a</span><span class="o">.</span><span class="n">this</span> </span></pre></div> @@ -1182,8 +1188,8 @@ elimination: </div> <a class="headerlink" href="#is_null"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="is_null-429"><a href="#is_null-429"><span class="linenos">429</span></a><span class="k">def</span> <span class="nf">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> -</span><span id="is_null-430"><a href="#is_null-430"><span class="linenos">430</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Null</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="is_null-431"><a href="#is_null-431"><span class="linenos">431</span></a><span class="k">def</span> <span class="nf">is_null</span><span class="p">(</span><span class="n">a</span><span class="p">:</span> <span class="n">exp</span><span class="o">.</span><span class="n">Expression</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> +</span><span id="is_null-432"><a href="#is_null-432"><span class="linenos">432</span></a> <span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="n">a</span><span class="p">)</span> <span class="ow">is</span> <span class="n">exp</span><span class="o">.</span><span class="n">Null</span> </span></pre></div> @@ -1201,20 +1207,20 @@ elimination: </div> <a class="headerlink" href="#eval_boolean"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="eval_boolean-433"><a href="#eval_boolean-433"><span class="linenos">433</span></a><span class="k">def</span> <span class="nf">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> -</span><span id="eval_boolean-434"><a href="#eval_boolean-434"><span class="linenos">434</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">)):</span> -</span><span id="eval_boolean-435"><a href="#eval_boolean-435"><span class="linenos">435</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">==</span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-436"><a href="#eval_boolean-436"><span class="linenos">436</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> -</span><span id="eval_boolean-437"><a href="#eval_boolean-437"><span class="linenos">437</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">!=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-438"><a href="#eval_boolean-438"><span class="linenos">438</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> -</span><span id="eval_boolean-439"><a href="#eval_boolean-439"><span class="linenos">439</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">></span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-440"><a href="#eval_boolean-440"><span class="linenos">440</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> -</span><span id="eval_boolean-441"><a href="#eval_boolean-441"><span class="linenos">441</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">>=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-442"><a href="#eval_boolean-442"><span class="linenos">442</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> -</span><span id="eval_boolean-443"><a href="#eval_boolean-443"><span class="linenos">443</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><</span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-444"><a href="#eval_boolean-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> -</span><span id="eval_boolean-445"><a href="#eval_boolean-445"><span class="linenos">445</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><=</span> <span class="n">b</span><span class="p">)</span> -</span><span id="eval_boolean-446"><a href="#eval_boolean-446"><span class="linenos">446</span></a> <span class="k">return</span> <span class="kc">None</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="eval_boolean-435"><a href="#eval_boolean-435"><span class="linenos">435</span></a><span class="k">def</span> <span class="nf">eval_boolean</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span> +</span><span id="eval_boolean-436"><a href="#eval_boolean-436"><span class="linenos">436</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">EQ</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Is</span><span class="p">)):</span> +</span><span id="eval_boolean-437"><a href="#eval_boolean-437"><span class="linenos">437</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">==</span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-438"><a href="#eval_boolean-438"><span class="linenos">438</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">NEQ</span><span class="p">):</span> +</span><span id="eval_boolean-439"><a href="#eval_boolean-439"><span class="linenos">439</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">!=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-440"><a href="#eval_boolean-440"><span class="linenos">440</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GT</span><span class="p">):</span> +</span><span id="eval_boolean-441"><a href="#eval_boolean-441"><span class="linenos">441</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">></span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-442"><a href="#eval_boolean-442"><span class="linenos">442</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">GTE</span><span class="p">):</span> +</span><span id="eval_boolean-443"><a href="#eval_boolean-443"><span class="linenos">443</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o">>=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-444"><a href="#eval_boolean-444"><span class="linenos">444</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LT</span><span class="p">):</span> +</span><span id="eval_boolean-445"><a href="#eval_boolean-445"><span class="linenos">445</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><</span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-446"><a href="#eval_boolean-446"><span class="linenos">446</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">LTE</span><span class="p">):</span> +</span><span id="eval_boolean-447"><a href="#eval_boolean-447"><span class="linenos">447</span></a> <span class="k">return</span> <span class="n">boolean_literal</span><span class="p">(</span><span class="n">a</span> <span class="o"><=</span> <span class="n">b</span><span class="p">)</span> +</span><span id="eval_boolean-448"><a href="#eval_boolean-448"><span class="linenos">448</span></a> <span class="k">return</span> <span class="kc">None</span> </span></pre></div> @@ -1232,16 +1238,16 @@ elimination: </div> <a class="headerlink" href="#extract_date"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="extract_date-449"><a href="#extract_date-449"><span class="linenos">449</span></a><span class="k">def</span> <span class="nf">extract_date</span><span class="p">(</span><span class="n">cast</span><span class="p">):</span> -</span><span id="extract_date-450"><a href="#extract_date-450"><span class="linenos">450</span></a> <span class="c1"># The "fromisoformat" conversion could fail if the cast is used on an identifier,</span> -</span><span id="extract_date-451"><a href="#extract_date-451"><span class="linenos">451</span></a> <span class="c1"># so in that case we can't extract the date.</span> -</span><span id="extract_date-452"><a href="#extract_date-452"><span class="linenos">452</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="extract_date-453"><a href="#extract_date-453"><span class="linenos">453</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span><span class="p">:</span> -</span><span id="extract_date-454"><a href="#extract_date-454"><span class="linenos">454</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">date</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="extract_date-455"><a href="#extract_date-455"><span class="linenos">455</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATETIME</span><span class="p">:</span> -</span><span id="extract_date-456"><a href="#extract_date-456"><span class="linenos">456</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="extract_date-457"><a href="#extract_date-457"><span class="linenos">457</span></a> <span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span> -</span><span id="extract_date-458"><a href="#extract_date-458"><span class="linenos">458</span></a> <span class="k">return</span> <span class="kc">None</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="extract_date-451"><a href="#extract_date-451"><span class="linenos">451</span></a><span class="k">def</span> <span class="nf">extract_date</span><span class="p">(</span><span class="n">cast</span><span class="p">):</span> +</span><span id="extract_date-452"><a href="#extract_date-452"><span class="linenos">452</span></a> <span class="c1"># The "fromisoformat" conversion could fail if the cast is used on an identifier,</span> +</span><span id="extract_date-453"><a href="#extract_date-453"><span class="linenos">453</span></a> <span class="c1"># so in that case we can't extract the date.</span> +</span><span id="extract_date-454"><a href="#extract_date-454"><span class="linenos">454</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="extract_date-455"><a href="#extract_date-455"><span class="linenos">455</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATE</span><span class="p">:</span> +</span><span id="extract_date-456"><a href="#extract_date-456"><span class="linenos">456</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">date</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="extract_date-457"><a href="#extract_date-457"><span class="linenos">457</span></a> <span class="k">if</span> <span class="n">cast</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"to"</span><span class="p">]</span><span class="o">.</span><span class="n">this</span> <span class="o">==</span> <span class="n">exp</span><span class="o">.</span><span class="n">DataType</span><span class="o">.</span><span class="n">Type</span><span class="o">.</span><span class="n">DATETIME</span><span class="p">:</span> +</span><span id="extract_date-458"><a href="#extract_date-458"><span class="linenos">458</span></a> <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromisoformat</span><span class="p">(</span><span class="n">cast</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="extract_date-459"><a href="#extract_date-459"><span class="linenos">459</span></a> <span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span> +</span><span id="extract_date-460"><a href="#extract_date-460"><span class="linenos">460</span></a> <span class="k">return</span> <span class="kc">None</span> </span></pre></div> @@ -1259,24 +1265,24 @@ elimination: </div> <a class="headerlink" href="#extract_interval"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="extract_interval-461"><a href="#extract_interval-461"><span class="linenos">461</span></a><span class="k">def</span> <span class="nf">extract_interval</span><span class="p">(</span><span class="n">interval</span><span class="p">):</span> -</span><span id="extract_interval-462"><a href="#extract_interval-462"><span class="linenos">462</span></a> <span class="k">try</span><span class="p">:</span> -</span><span id="extract_interval-463"><a href="#extract_interval-463"><span class="linenos">463</span></a> <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="kn">import</span> <span class="n">relativedelta</span> <span class="c1"># type: ignore</span> -</span><span id="extract_interval-464"><a href="#extract_interval-464"><span class="linenos">464</span></a> <span class="k">except</span> <span class="ne">ModuleNotFoundError</span><span class="p">:</span> -</span><span id="extract_interval-465"><a href="#extract_interval-465"><span class="linenos">465</span></a> <span class="k">return</span> <span class="kc">None</span> -</span><span id="extract_interval-466"><a href="#extract_interval-466"><span class="linenos">466</span></a> -</span><span id="extract_interval-467"><a href="#extract_interval-467"><span class="linenos">467</span></a> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">interval</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> -</span><span id="extract_interval-468"><a href="#extract_interval-468"><span class="linenos">468</span></a> <span class="n">unit</span> <span class="o">=</span> <span class="n">interval</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> -</span><span id="extract_interval-469"><a href="#extract_interval-469"><span class="linenos">469</span></a> -</span><span id="extract_interval-470"><a href="#extract_interval-470"><span class="linenos">470</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"year"</span><span class="p">:</span> -</span><span id="extract_interval-471"><a href="#extract_interval-471"><span class="linenos">471</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">years</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="extract_interval-472"><a href="#extract_interval-472"><span class="linenos">472</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"month"</span><span class="p">:</span> -</span><span id="extract_interval-473"><a href="#extract_interval-473"><span class="linenos">473</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">months</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="extract_interval-474"><a href="#extract_interval-474"><span class="linenos">474</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"week"</span><span class="p">:</span> -</span><span id="extract_interval-475"><a href="#extract_interval-475"><span class="linenos">475</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">weeks</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="extract_interval-476"><a href="#extract_interval-476"><span class="linenos">476</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"day"</span><span class="p">:</span> -</span><span id="extract_interval-477"><a href="#extract_interval-477"><span class="linenos">477</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">days</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> -</span><span id="extract_interval-478"><a href="#extract_interval-478"><span class="linenos">478</span></a> <span class="k">return</span> <span class="kc">None</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="extract_interval-463"><a href="#extract_interval-463"><span class="linenos">463</span></a><span class="k">def</span> <span class="nf">extract_interval</span><span class="p">(</span><span class="n">interval</span><span class="p">):</span> +</span><span id="extract_interval-464"><a href="#extract_interval-464"><span class="linenos">464</span></a> <span class="k">try</span><span class="p">:</span> +</span><span id="extract_interval-465"><a href="#extract_interval-465"><span class="linenos">465</span></a> <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="kn">import</span> <span class="n">relativedelta</span> <span class="c1"># type: ignore</span> +</span><span id="extract_interval-466"><a href="#extract_interval-466"><span class="linenos">466</span></a> <span class="k">except</span> <span class="ne">ModuleNotFoundError</span><span class="p">:</span> +</span><span id="extract_interval-467"><a href="#extract_interval-467"><span class="linenos">467</span></a> <span class="k">return</span> <span class="kc">None</span> +</span><span id="extract_interval-468"><a href="#extract_interval-468"><span class="linenos">468</span></a> +</span><span id="extract_interval-469"><a href="#extract_interval-469"><span class="linenos">469</span></a> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">interval</span><span class="o">.</span><span class="n">name</span><span class="p">)</span> +</span><span id="extract_interval-470"><a href="#extract_interval-470"><span class="linenos">470</span></a> <span class="n">unit</span> <span class="o">=</span> <span class="n">interval</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="s2">"unit"</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> +</span><span id="extract_interval-471"><a href="#extract_interval-471"><span class="linenos">471</span></a> +</span><span id="extract_interval-472"><a href="#extract_interval-472"><span class="linenos">472</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"year"</span><span class="p">:</span> +</span><span id="extract_interval-473"><a href="#extract_interval-473"><span class="linenos">473</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">years</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="extract_interval-474"><a href="#extract_interval-474"><span class="linenos">474</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"month"</span><span class="p">:</span> +</span><span id="extract_interval-475"><a href="#extract_interval-475"><span class="linenos">475</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">months</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="extract_interval-476"><a href="#extract_interval-476"><span class="linenos">476</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"week"</span><span class="p">:</span> +</span><span id="extract_interval-477"><a href="#extract_interval-477"><span class="linenos">477</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">weeks</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="extract_interval-478"><a href="#extract_interval-478"><span class="linenos">478</span></a> <span class="k">if</span> <span class="n">unit</span> <span class="o">==</span> <span class="s2">"day"</span><span class="p">:</span> +</span><span id="extract_interval-479"><a href="#extract_interval-479"><span class="linenos">479</span></a> <span class="k">return</span> <span class="n">relativedelta</span><span class="p">(</span><span class="n">days</span><span class="o">=</span><span class="n">n</span><span class="p">)</span> +</span><span id="extract_interval-480"><a href="#extract_interval-480"><span class="linenos">480</span></a> <span class="k">return</span> <span class="kc">None</span> </span></pre></div> @@ -1294,11 +1300,11 @@ elimination: </div> <a class="headerlink" href="#date_literal"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="date_literal-481"><a href="#date_literal-481"><span class="linenos">481</span></a><span class="k">def</span> <span class="nf">date_literal</span><span class="p">(</span><span class="n">date</span><span class="p">):</span> -</span><span id="date_literal-482"><a href="#date_literal-482"><span class="linenos">482</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span> -</span><span id="date_literal-483"><a href="#date_literal-483"><span class="linenos">483</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="n">date</span><span class="p">),</span> -</span><span id="date_literal-484"><a href="#date_literal-484"><span class="linenos">484</span></a> <span class="s2">"DATETIME"</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">date</span><span class="p">,</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"DATE"</span><span class="p">,</span> -</span><span id="date_literal-485"><a href="#date_literal-485"><span class="linenos">485</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="date_literal-483"><a href="#date_literal-483"><span class="linenos">483</span></a><span class="k">def</span> <span class="nf">date_literal</span><span class="p">(</span><span class="n">date</span><span class="p">):</span> +</span><span id="date_literal-484"><a href="#date_literal-484"><span class="linenos">484</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span> +</span><span id="date_literal-485"><a href="#date_literal-485"><span class="linenos">485</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Literal</span><span class="o">.</span><span class="n">string</span><span class="p">(</span><span class="n">date</span><span class="p">),</span> +</span><span id="date_literal-486"><a href="#date_literal-486"><span class="linenos">486</span></a> <span class="s2">"DATETIME"</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">date</span><span class="p">,</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="p">)</span> <span class="k">else</span> <span class="s2">"DATE"</span><span class="p">,</span> +</span><span id="date_literal-487"><a href="#date_literal-487"><span class="linenos">487</span></a> <span class="p">)</span> </span></pre></div> @@ -1316,8 +1322,8 @@ elimination: </div> <a class="headerlink" href="#boolean_literal"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="boolean_literal-488"><a href="#boolean_literal-488"><span class="linenos">488</span></a><span class="k">def</span> <span class="nf">boolean_literal</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> -</span><span id="boolean_literal-489"><a href="#boolean_literal-489"><span class="linenos">489</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">condition</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="boolean_literal-490"><a href="#boolean_literal-490"><span class="linenos">490</span></a><span class="k">def</span> <span class="nf">boolean_literal</span><span class="p">(</span><span class="n">condition</span><span class="p">):</span> +</span><span id="boolean_literal-491"><a href="#boolean_literal-491"><span class="linenos">491</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">true</span><span class="p">()</span> <span class="k">if</span> <span class="n">condition</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">false</span><span class="p">()</span> </span></pre></div> |