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diff --git a/docs/sqlglot/optimizer/unnest_subqueries.html b/docs/sqlglot/optimizer/unnest_subqueries.html index ed5ae03..2f4ae9b 100644 --- a/docs/sqlglot/optimizer/unnest_subqueries.html +++ b/docs/sqlglot/optimizer/unnest_subqueries.html @@ -62,275 +62,270 @@ <label class="view-source-button" for="mod-unnest_subqueries-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><span id="L-3"><a href="#L-3"><span class="linenos"> 3</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-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">ScopeType</span><span class="p">,</span> <span class="n">traverse_scope</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">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">name_sequence</span> +</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">ScopeType</span><span class="p">,</span> <span class="n">traverse_scope</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><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">unnest_subqueries</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"> Rewrite sqlglot AST to convert some predicates with subqueries into joins.</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"> Convert scalar subqueries into cross joins.</span> -</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a><span class="sd"> Convert correlated or vectorized subqueries into a group by so it is not a many to many left join.</span> -</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 * FROM x AS x WHERE (SELECT y.a AS a FROM y AS y WHERE x.a = y.a) = 1 ")</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> unnest_subqueries(expression).sql()</span> -</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> 'SELECT * FROM x AS x LEFT JOIN (SELECT y.a AS a FROM y AS y WHERE TRUE GROUP BY y.a) AS _u_0 ON x.a = _u_0.a WHERE _u_0.a = 1'</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"> Args:</span> -</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> expression (sqlglot.Expression): expression to unnest</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> Returns:</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> sqlglot.Expression: unnested expression</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> """</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</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-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="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-28"><a href="#L-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="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">parent_select</span> -</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">parent</span><span class="p">:</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="k">continue</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">:</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="n">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">,</span> <span class="n">sequence</span><span class="p">)</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="k">elif</span> <span class="n">scope</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 class="p">:</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">sequence</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">return</span> <span class="n">expression</span> +</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a><span class="k">def</span> <span class="nf">unnest_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="sd"> Rewrite sqlglot AST to convert some predicates with subqueries into joins.</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="sd"> Convert scalar subqueries into cross joins.</span> +</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="sd"> Convert correlated or vectorized subqueries into a group by so it is not a many to many left join.</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"> Example:</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 * FROM x AS x WHERE (SELECT y.a AS a FROM y AS y WHERE x.a = y.a) = 1 ")</span> +</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> >>> unnest_subqueries(expression).sql()</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> 'SELECT * FROM x AS x LEFT JOIN (SELECT y.a AS a FROM y AS y WHERE TRUE GROUP BY y.a) AS _u_0 ON x.a = _u_0.a WHERE _u_0.a = 1'</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="sd"> Args:</span> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> expression (sqlglot.Expression): expression to unnest</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> Returns:</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> sqlglot.Expression: unnested expression</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> """</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a> <span class="n">next_alias_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_u_"</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="n">traverse_scope</span><span class="p">(</span><span class="n">expression</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">parent</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">parent_select</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">parent</span><span class="p">:</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a> <span class="k">continue</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">:</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a> <span class="n">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">)</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a> <span class="k">elif</span> <span class="n">scope</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 class="p">:</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">next_alias_name</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="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><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">def</span> <span class="nf">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">sequence</span><span class="p">):</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</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><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="n">predicate</span> <span class="o">=</span> <span class="n">select</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-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</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="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> <span class="k">return</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="c1"># this subquery returns a scalar and can just be converted to a cross join</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="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">)):</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">having</span> <span class="o">=</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">Having</span><span class="p">)</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</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">select</span><span class="o">.</span><span class="n">selects</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 class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="k">if</span> <span class="n">having</span> <span class="ow">and</span> <span class="n">having</span><span class="o">.</span><span class="n">parent_select</span> <span class="ow">is</span> <span class="n">parent_select</span><span class="p">:</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">column</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_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <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="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> -</span><span id="L-62"><a href="#L-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="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <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><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="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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> -</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="k">return</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">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">predicate</span> <span class="o">=</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">EQ</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">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="k">return</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="n">column</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</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="n">on</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span><span class="sa">f</span><span class="s1">'</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s1"> = "</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s1">"."</span><span class="si">{</span><span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="si">}</span><span class="s1">"'</span><span class="p">)</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">on</span><span class="o">.</span><span class="n">right</span><span class="si">}</span><span class="s2"> IS NULL"</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="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="n">value</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-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="n">on</span><span class="o">=</span><span class="n">on</span><span class="p">,</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <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="p">)</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a><span class="k">def</span> <span class="nf">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">next_alias_name</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">len</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="k">return</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="n">predicate</span> <span class="o">=</span> <span class="n">select</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-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">next_alias_name</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">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</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><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="c1"># this subquery returns a scalar and can just be converted to a cross join</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">)):</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">having</span> <span class="o">=</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">Having</span><span class="p">)</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</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">select</span><span class="o">.</span><span class="n">selects</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 class="p">,</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="k">if</span> <span class="n">having</span> <span class="ow">and</span> <span class="n">having</span><span class="o">.</span><span class="n">parent_select</span> <span class="ow">is</span> <span class="n">parent_select</span><span class="p">:</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">column</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">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="n">select</span><span class="p">,</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</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><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">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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <span class="k">return</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">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="n">predicate</span> <span class="o">=</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">EQ</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">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="k">return</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="n">column</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</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="n">on</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span><span class="sa">f</span><span class="s1">'</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s1"> = "</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s1">"."</span><span class="si">{</span><span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="si">}</span><span class="s1">"'</span><span class="p">)</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">on</span><span class="o">.</span><span class="n">right</span><span class="si">}</span><span class="s2"> IS NULL"</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="n">parent_select</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">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="n">value</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-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="n">on</span><span class="o">=</span><span class="n">on</span><span class="p">,</span> +</span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <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="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><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">def</span> <span class="nf">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">external_columns</span><span class="p">,</span> <span class="n">sequence</span><span class="p">):</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</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-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">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="n">where</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">Or</span><span class="p">)</span> <span class="ow">or</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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</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><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="n">table_alias</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">keys</span> <span class="o">=</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="c1"># for all external columns in the where statement, find the relevant predicate</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="c1"># keys to convert it into a join</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">external_columns</span><span class="p">:</span> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</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><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">predicate</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">Predicate</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="ow">not</span> <span class="n">predicate</span> <span class="ow">or</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</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><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="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">key</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">right</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">node</span> <span class="ow">is</span> <span class="n">column</span> <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="n">predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">walk</span><span class="p">())</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="k">else</span> <span class="n">predicate</span><span class="o">.</span><span class="n">left</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="p">)</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">return</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="n">keys</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</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">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">):</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">return</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="n">is_subquery_projection</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">node</span> <span class="ow">is</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">parent_select</span><span class="o">.</span><span class="n">selects</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">Subquery</span><span class="p">)</span> -</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> <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">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">key_aliases</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="n">group_by</span> <span class="o">=</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">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="c1"># if we filter on the value of the subquery, it needs to be unique</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="k">else</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="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="p">:</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="c1"># all predicates that are equalities must also be in the unique</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="c1"># so that we don't do a many to many join</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">predicate</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="ow">and</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</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="n">parent_predicate</span> <span class="o">=</span> <span class="n">select</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">Predicate</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="c1"># if the value of the subquery is not an agg or a key, we need to collect it into an array</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="c1"># so that it can be grouped. For subquery projections, we use a MAX aggregation instead.</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">agg_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span> <span class="k">if</span> <span class="n">is_subquery_projection</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArrayAgg</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">value</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="ow">and</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">),</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="p">)</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="c1"># exists queries should not have any selects as it only checks if there are any rows</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="c1"># all selects will be added by the optimizer and only used for join keys</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">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"expressions"</span><span class="p">]</span> <span class="o">=</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">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">alias</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="c1"># add all keys to the projections of the subquery</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="c1"># so that we can use it as a join key</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">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">)</span> <span class="ow">or</span> <span class="n">key</span> <span class="o">!=</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">key</span><span class="si">}</span><span class="s2"> AS </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</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-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="n">select</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">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">key</span><span class="o">.</span><span class="n">copy</span><span class="p">()),</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</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-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</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">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="n">other</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">)</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> -</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">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">alias</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="nb">list</span><span class="p">(</span><span class="n">key_aliases</span><span class="o">.</span><span class="n">values</span><span class="p">())[</span><span class="mi">0</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2"> IS NULL"</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">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">):</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ALL(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</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="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span><span class="p">)</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</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="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><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">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">this</span><span class="si">}</span><span class="s2">)"</span><span class="p">,</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="p">)</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="k">else</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="n">is_subquery_projection</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">alias_</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">)</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="c1"># COUNT always returns 0 on empty datasets, so we need take that into consideration here</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="c1"># by transforming all counts into 0 and using that as the coalesced value</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="k">if</span> <span class="n">value</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">Count</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">def</span> <span class="nf">remove_aggs</span><span class="p">(</span><span class="n">node</span><span class="p">):</span> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</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">Count</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="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="mi">0</span><span class="p">)</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</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">AggFunc</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">exp</span><span class="o">.</span><span class="n">null</span><span class="p">()</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="k">return</span> <span class="n">node</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="n">alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">this</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">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">remove_aggs</span><span class="p">)],</span> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <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 class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">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">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</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-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="n">nested</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">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> -</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a> <span class="k">continue</span> -</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">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="sa">f</span><span class="s2">"(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s2"> AND ARRAY_CONTAINS(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s2">, </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-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="p">)</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">key</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">to_identifier</span><span class="p">(</span><span class="s2">"_x"</span><span class="p">))</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="sa">f</span><span class="s1">'(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s1"> AND ARRAY_ANY(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s1">, "_x" -> </span><span class="si">{</span><span class="n">predicate</span><span class="si">}</span><span class="s1">))'</span><span class="p">,</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="p">)</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="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="o">*</span><span class="n">group_by</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-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">on</span><span class="o">=</span><span class="p">[</span><span class="n">predicate</span> <span class="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">table_alias</span><span class="p">,</span> -</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> <span class="p">)</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a><span class="k">def</span> <span class="nf">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">external_columns</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">):</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</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-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">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="n">where</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">Or</span><span class="p">)</span> <span class="ow">or</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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">return</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">table_alias</span> <span class="o">=</span> <span class="n">next_alias_name</span><span class="p">()</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">keys</span> <span class="o">=</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="c1"># for all external columns in the where statement, find the relevant predicate</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="c1"># keys to convert it into a join</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">external_columns</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">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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</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><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="n">predicate</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">Predicate</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">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</span><span class="p">:</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> <span class="k">return</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> +</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">predicate</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-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">key</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">right</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">node</span> <span class="ow">is</span> <span class="n">column</span> <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="n">predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">walk</span><span class="p">())</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> <span class="k">else</span> <span class="n">predicate</span><span class="o">.</span><span class="n">left</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="p">)</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">return</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">keys</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span><span class="p">))</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</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><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">is_subquery_projection</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="n">node</span> <span class="ow">is</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">parent_select</span><span class="o">.</span><span class="n">selects</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">Subquery</span><span class="p">)</span> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <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">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">key_aliases</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="n">group_by</span> <span class="o">=</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">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="c1"># if we filter on the value of the subquery, it needs to be unique</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="k">else</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="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="p">:</span> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">next_alias_name</span><span class="p">()</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="c1"># all predicates that are equalities must also be in the unique</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="c1"># so that we don't do a many to many join</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">predicate</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="ow">and</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</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 class="n">parent_predicate</span> <span class="o">=</span> <span class="n">select</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">Predicate</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="c1"># if the value of the subquery is not an agg or a key, we need to collect it into an array</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="c1"># so that it can be grouped. For subquery projections, we use a MAX aggregation instead.</span> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">agg_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span> <span class="k">if</span> <span class="n">is_subquery_projection</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArrayAgg</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">value</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="ow">and</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</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">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">),</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <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"># exists queries should not have any selects as it only checks if there are any rows</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="c1"># all selects will be added by the optimizer and only used for join keys</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"expressions"</span><span class="p">]</span> <span class="o">=</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 class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">alias</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="c1"># add all keys to the projections of the subquery</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="c1"># so that we can use it as a join key</span> +</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">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">)</span> <span class="ow">or</span> <span class="n">key</span> <span class="o">!=</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">key</span><span class="si">}</span><span class="s2"> AS </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</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-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="k">else</span><span class="p">:</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">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 class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">key</span><span class="o">.</span><span class="n">copy</span><span class="p">()),</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</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-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="n">alias</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">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">other</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">parent_predicate</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">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">alias</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="nb">list</span><span class="p">(</span><span class="n">key_aliases</span><span class="o">.</span><span class="n">values</span><span class="p">())[</span><span class="mi">0</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2"> IS NULL"</span><span class="p">)</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">):</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ALL(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="p">)</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</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="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">):</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">this</span><span class="si">}</span><span class="s2">)"</span><span class="p">,</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="p">)</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="k">else</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">is_subquery_projection</span><span class="p">:</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="n">alias</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">alias</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</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="c1"># COUNT always returns 0 on empty datasets, so we need take that into consideration here</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="c1"># by transforming all counts into 0 and using that as the coalesced value</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="k">if</span> <span class="n">value</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">Count</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 class="k">def</span> <span class="nf">remove_aggs</span><span class="p">(</span><span class="n">node</span><span class="p">):</span> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</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">Count</span><span class="p">):</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</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="mi">0</span><span class="p">)</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</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">AggFunc</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 class="n">exp</span><span class="o">.</span><span class="n">null</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">node</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="n">alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">remove_aggs</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><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">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">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</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-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="n">nested</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">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">],</span> <span class="n">table_alias</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="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> +</span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="k">continue</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="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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-226"><a href="#L-226"><span class="linenos">226</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a> <span class="sa">f</span><span class="s2">"(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s2"> AND ARRAY_CONTAINS(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s2">, </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-229"><a href="#L-229"><span class="linenos">229</span></a> <span class="p">)</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="n">key</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">to_identifier</span><span class="p">(</span><span class="s2">"_x"</span><span class="p">))</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="sa">f</span><span class="s1">'(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s1"> AND ARRAY_ANY(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s1">, "_x" -> </span><span class="si">{</span><span class="n">predicate</span><span class="si">}</span><span class="s1">))'</span><span class="p">,</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="p">)</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="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="o">*</span><span class="n">group_by</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-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">on</span><span class="o">=</span><span class="p">[</span><span class="n">predicate</span> <span class="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">table_alias</span><span class="p">,</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> <span class="p">)</span> +</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><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="k">def</span> <span class="nf">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">):</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> <span class="k">return</span> <span class="sa">f</span><span class="s2">"_u_</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-246"><a href="#L-246"><span class="linenos">246</span></a><span class="k">def</span> <span class="nf">_replace</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">condition</span><span class="p">):</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 class="o">.</span><span class="n">replace</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">condition</span><span class="p">))</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><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="k">def</span> <span class="nf">_replace</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">condition</span><span class="p">):</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a> <span class="k">return</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">condition</span><span class="p">(</span><span class="n">condition</span><span class="p">))</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="k">def</span> <span class="nf">_other_operand</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</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">In</span><span class="p">):</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</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-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><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a><span class="k">def</span> <span class="nf">_other_operand</span><span class="p">(</span><span class="n">expression</span><span class="p">):</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">In</span><span class="p">):</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</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-258"><a href="#L-258"><span class="linenos">258</span></a> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</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">Any</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">)):</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="k">return</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</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="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><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="k">return</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">right</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</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">left</span><span class="p">,</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="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">))</span> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">else</span> <span class="n">expression</span><span class="o">.</span><span class="n">left</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><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">return</span> <span class="kc">None</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="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">)):</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="k">return</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> +</span><span id="L-257"><a href="#L-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">Binary</span><span class="p">):</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="k">return</span> <span class="p">(</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">right</span> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</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">left</span><span class="p">,</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="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">))</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="k">else</span> <span class="n">expression</span><span class="o">.</span><span class="n">left</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <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="k">return</span> <span class="kc">None</span> </span></pre></div> @@ -346,37 +341,37 @@ </div> <a class="headerlink" href="#unnest_subqueries"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="unnest_subqueries-8"><a href="#unnest_subqueries-8"><span class="linenos"> 8</span></a><span class="k">def</span> <span class="nf">unnest_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> -</span><span id="unnest_subqueries-9"><a href="#unnest_subqueries-9"><span class="linenos"> 9</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="unnest_subqueries-10"><a href="#unnest_subqueries-10"><span class="linenos">10</span></a><span class="sd"> Rewrite sqlglot AST to convert some predicates with subqueries into joins.</span> -</span><span id="unnest_subqueries-11"><a href="#unnest_subqueries-11"><span class="linenos">11</span></a> -</span><span id="unnest_subqueries-12"><a href="#unnest_subqueries-12"><span class="linenos">12</span></a><span class="sd"> Convert scalar subqueries into cross joins.</span> -</span><span id="unnest_subqueries-13"><a href="#unnest_subqueries-13"><span class="linenos">13</span></a><span class="sd"> Convert correlated or vectorized subqueries into a group by so it is not a many to many left join.</span> -</span><span id="unnest_subqueries-14"><a href="#unnest_subqueries-14"><span class="linenos">14</span></a> -</span><span id="unnest_subqueries-15"><a href="#unnest_subqueries-15"><span class="linenos">15</span></a><span class="sd"> Example:</span> -</span><span id="unnest_subqueries-16"><a href="#unnest_subqueries-16"><span class="linenos">16</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="unnest_subqueries-17"><a href="#unnest_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT * FROM x AS x WHERE (SELECT y.a AS a FROM y AS y WHERE x.a = y.a) = 1 ")</span> -</span><span id="unnest_subqueries-18"><a href="#unnest_subqueries-18"><span class="linenos">18</span></a><span class="sd"> >>> unnest_subqueries(expression).sql()</span> -</span><span id="unnest_subqueries-19"><a href="#unnest_subqueries-19"><span class="linenos">19</span></a><span class="sd"> 'SELECT * FROM x AS x LEFT JOIN (SELECT y.a AS a FROM y AS y WHERE TRUE GROUP BY y.a) AS _u_0 ON x.a = _u_0.a WHERE _u_0.a = 1'</span> -</span><span id="unnest_subqueries-20"><a href="#unnest_subqueries-20"><span class="linenos">20</span></a> -</span><span id="unnest_subqueries-21"><a href="#unnest_subqueries-21"><span class="linenos">21</span></a><span class="sd"> Args:</span> -</span><span id="unnest_subqueries-22"><a href="#unnest_subqueries-22"><span class="linenos">22</span></a><span class="sd"> expression (sqlglot.Expression): expression to unnest</span> -</span><span id="unnest_subqueries-23"><a href="#unnest_subqueries-23"><span class="linenos">23</span></a><span class="sd"> Returns:</span> -</span><span id="unnest_subqueries-24"><a href="#unnest_subqueries-24"><span class="linenos">24</span></a><span class="sd"> sqlglot.Expression: unnested expression</span> -</span><span id="unnest_subqueries-25"><a href="#unnest_subqueries-25"><span class="linenos">25</span></a><span class="sd"> """</span> -</span><span id="unnest_subqueries-26"><a href="#unnest_subqueries-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="unnest_subqueries-27"><a href="#unnest_subqueries-27"><span class="linenos">27</span></a> -</span><span id="unnest_subqueries-28"><a href="#unnest_subqueries-28"><span class="linenos">28</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="unnest_subqueries-29"><a href="#unnest_subqueries-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="unnest_subqueries-30"><a href="#unnest_subqueries-30"><span class="linenos">30</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">parent_select</span> -</span><span id="unnest_subqueries-31"><a href="#unnest_subqueries-31"><span class="linenos">31</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">parent</span><span class="p">:</span> -</span><span id="unnest_subqueries-32"><a href="#unnest_subqueries-32"><span class="linenos">32</span></a> <span class="k">continue</span> -</span><span id="unnest_subqueries-33"><a href="#unnest_subqueries-33"><span class="linenos">33</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">:</span> -</span><span id="unnest_subqueries-34"><a href="#unnest_subqueries-34"><span class="linenos">34</span></a> <span class="n">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">,</span> <span class="n">sequence</span><span class="p">)</span> -</span><span id="unnest_subqueries-35"><a href="#unnest_subqueries-35"><span class="linenos">35</span></a> <span class="k">elif</span> <span class="n">scope</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 class="p">:</span> -</span><span id="unnest_subqueries-36"><a href="#unnest_subqueries-36"><span class="linenos">36</span></a> <span class="n">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">sequence</span><span class="p">)</span> -</span><span id="unnest_subqueries-37"><a href="#unnest_subqueries-37"><span class="linenos">37</span></a> -</span><span id="unnest_subqueries-38"><a href="#unnest_subqueries-38"><span class="linenos">38</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="unnest_subqueries-7"><a href="#unnest_subqueries-7"><span class="linenos"> 7</span></a><span class="k">def</span> <span class="nf">unnest_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span> +</span><span id="unnest_subqueries-8"><a href="#unnest_subqueries-8"><span class="linenos"> 8</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="unnest_subqueries-9"><a href="#unnest_subqueries-9"><span class="linenos"> 9</span></a><span class="sd"> Rewrite sqlglot AST to convert some predicates with subqueries into joins.</span> +</span><span id="unnest_subqueries-10"><a href="#unnest_subqueries-10"><span class="linenos">10</span></a> +</span><span id="unnest_subqueries-11"><a href="#unnest_subqueries-11"><span class="linenos">11</span></a><span class="sd"> Convert scalar subqueries into cross joins.</span> +</span><span id="unnest_subqueries-12"><a href="#unnest_subqueries-12"><span class="linenos">12</span></a><span class="sd"> Convert correlated or vectorized subqueries into a group by so it is not a many to many left join.</span> +</span><span id="unnest_subqueries-13"><a href="#unnest_subqueries-13"><span class="linenos">13</span></a> +</span><span id="unnest_subqueries-14"><a href="#unnest_subqueries-14"><span class="linenos">14</span></a><span class="sd"> Example:</span> +</span><span id="unnest_subqueries-15"><a href="#unnest_subqueries-15"><span class="linenos">15</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="unnest_subqueries-16"><a href="#unnest_subqueries-16"><span class="linenos">16</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT * FROM x AS x WHERE (SELECT y.a AS a FROM y AS y WHERE x.a = y.a) = 1 ")</span> +</span><span id="unnest_subqueries-17"><a href="#unnest_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> unnest_subqueries(expression).sql()</span> +</span><span id="unnest_subqueries-18"><a href="#unnest_subqueries-18"><span class="linenos">18</span></a><span class="sd"> 'SELECT * FROM x AS x LEFT JOIN (SELECT y.a AS a FROM y AS y WHERE TRUE GROUP BY y.a) AS _u_0 ON x.a = _u_0.a WHERE _u_0.a = 1'</span> +</span><span id="unnest_subqueries-19"><a href="#unnest_subqueries-19"><span class="linenos">19</span></a> +</span><span id="unnest_subqueries-20"><a href="#unnest_subqueries-20"><span class="linenos">20</span></a><span class="sd"> Args:</span> +</span><span id="unnest_subqueries-21"><a href="#unnest_subqueries-21"><span class="linenos">21</span></a><span class="sd"> expression (sqlglot.Expression): expression to unnest</span> +</span><span id="unnest_subqueries-22"><a href="#unnest_subqueries-22"><span class="linenos">22</span></a><span class="sd"> Returns:</span> +</span><span id="unnest_subqueries-23"><a href="#unnest_subqueries-23"><span class="linenos">23</span></a><span class="sd"> sqlglot.Expression: unnested expression</span> +</span><span id="unnest_subqueries-24"><a href="#unnest_subqueries-24"><span class="linenos">24</span></a><span class="sd"> """</span> +</span><span id="unnest_subqueries-25"><a href="#unnest_subqueries-25"><span class="linenos">25</span></a> <span class="n">next_alias_name</span> <span class="o">=</span> <span class="n">name_sequence</span><span class="p">(</span><span class="s2">"_u_"</span><span class="p">)</span> +</span><span id="unnest_subqueries-26"><a href="#unnest_subqueries-26"><span class="linenos">26</span></a> +</span><span id="unnest_subqueries-27"><a href="#unnest_subqueries-27"><span class="linenos">27</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="unnest_subqueries-28"><a href="#unnest_subqueries-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="unnest_subqueries-29"><a href="#unnest_subqueries-29"><span class="linenos">29</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">parent_select</span> +</span><span id="unnest_subqueries-30"><a href="#unnest_subqueries-30"><span class="linenos">30</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">parent</span><span class="p">:</span> +</span><span id="unnest_subqueries-31"><a href="#unnest_subqueries-31"><span class="linenos">31</span></a> <span class="k">continue</span> +</span><span id="unnest_subqueries-32"><a href="#unnest_subqueries-32"><span class="linenos">32</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">:</span> +</span><span id="unnest_subqueries-33"><a href="#unnest_subqueries-33"><span class="linenos">33</span></a> <span class="n">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">scope</span><span class="o">.</span><span class="n">external_columns</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">)</span> +</span><span id="unnest_subqueries-34"><a href="#unnest_subqueries-34"><span class="linenos">34</span></a> <span class="k">elif</span> <span class="n">scope</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 class="p">:</span> +</span><span id="unnest_subqueries-35"><a href="#unnest_subqueries-35"><span class="linenos">35</span></a> <span class="n">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">)</span> +</span><span id="unnest_subqueries-36"><a href="#unnest_subqueries-36"><span class="linenos">36</span></a> +</span><span id="unnest_subqueries-37"><a href="#unnest_subqueries-37"><span class="linenos">37</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -417,60 +412,60 @@ Convert correlated or vectorized subqueries into a group by so it is not a many <div class="attr function"> <span class="def">def</span> - <span class="name">unnest</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">select</span>, </span><span class="param"><span class="n">parent_select</span>, </span><span class="param"><span class="n">sequence</span></span><span class="return-annotation">):</span></span> + <span class="name">unnest</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">select</span>, </span><span class="param"><span class="n">parent_select</span>, </span><span class="param"><span class="n">next_alias_name</span></span><span class="return-annotation">):</span></span> <label class="view-source-button" for="unnest-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#unnest"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="unnest-41"><a href="#unnest-41"><span class="linenos">41</span></a><span class="k">def</span> <span class="nf">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">sequence</span><span class="p">):</span> -</span><span id="unnest-42"><a href="#unnest-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span> -</span><span id="unnest-43"><a href="#unnest-43"><span class="linenos">43</span></a> <span class="k">return</span> -</span><span id="unnest-44"><a href="#unnest-44"><span class="linenos">44</span></a> -</span><span id="unnest-45"><a href="#unnest-45"><span class="linenos">45</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">select</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="unnest-46"><a href="#unnest-46"><span class="linenos">46</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span> -</span><span id="unnest-47"><a href="#unnest-47"><span class="linenos">47</span></a> -</span><span id="unnest-48"><a href="#unnest-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> -</span><span id="unnest-49"><a href="#unnest-49"><span class="linenos">49</span></a> <span class="k">return</span> -</span><span id="unnest-50"><a href="#unnest-50"><span class="linenos">50</span></a> -</span><span id="unnest-51"><a href="#unnest-51"><span class="linenos">51</span></a> <span class="c1"># this subquery returns a scalar and can just be converted to a cross join</span> -</span><span id="unnest-52"><a href="#unnest-52"><span class="linenos">52</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">)):</span> -</span><span id="unnest-53"><a href="#unnest-53"><span class="linenos">53</span></a> <span class="n">having</span> <span class="o">=</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">Having</span><span class="p">)</span> -</span><span id="unnest-54"><a href="#unnest-54"><span class="linenos">54</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">select</span><span class="o">.</span><span class="n">selects</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 class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="unnest-55"><a href="#unnest-55"><span class="linenos">55</span></a> <span class="k">if</span> <span class="n">having</span> <span class="ow">and</span> <span class="n">having</span><span class="o">.</span><span class="n">parent_select</span> <span class="ow">is</span> <span class="n">parent_select</span><span class="p">:</span> -</span><span id="unnest-56"><a href="#unnest-56"><span class="linenos">56</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)</span> -</span><span id="unnest-57"><a href="#unnest-57"><span class="linenos">57</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">column</span><span class="p">)</span> -</span><span id="unnest-58"><a href="#unnest-58"><span class="linenos">58</span></a> -</span><span id="unnest-59"><a href="#unnest-59"><span class="linenos">59</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="unnest-60"><a href="#unnest-60"><span class="linenos">60</span></a> <span class="n">select</span><span class="p">,</span> -</span><span id="unnest-61"><a href="#unnest-61"><span class="linenos">61</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> -</span><span id="unnest-62"><a href="#unnest-62"><span class="linenos">62</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> -</span><span id="unnest-63"><a href="#unnest-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="unnest-64"><a href="#unnest-64"><span class="linenos">64</span></a> <span class="p">)</span> -</span><span id="unnest-65"><a href="#unnest-65"><span class="linenos">65</span></a> <span class="k">return</span> -</span><span id="unnest-66"><a href="#unnest-66"><span class="linenos">66</span></a> -</span><span id="unnest-67"><a href="#unnest-67"><span class="linenos">67</span></a> <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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> -</span><span id="unnest-68"><a href="#unnest-68"><span class="linenos">68</span></a> <span class="k">return</span> -</span><span id="unnest-69"><a href="#unnest-69"><span class="linenos">69</span></a> -</span><span id="unnest-70"><a href="#unnest-70"><span class="linenos">70</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> -</span><span id="unnest-71"><a href="#unnest-71"><span class="linenos">71</span></a> <span class="n">predicate</span> <span class="o">=</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">EQ</span><span class="p">)</span> -</span><span id="unnest-72"><a href="#unnest-72"><span class="linenos">72</span></a> -</span><span id="unnest-73"><a href="#unnest-73"><span class="linenos">73</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> -</span><span id="unnest-74"><a href="#unnest-74"><span class="linenos">74</span></a> <span class="k">return</span> -</span><span id="unnest-75"><a href="#unnest-75"><span class="linenos">75</span></a> -</span><span id="unnest-76"><a href="#unnest-76"><span class="linenos">76</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> -</span><span id="unnest-77"><a href="#unnest-77"><span class="linenos">77</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="unnest-78"><a href="#unnest-78"><span class="linenos">78</span></a> -</span><span id="unnest-79"><a href="#unnest-79"><span class="linenos">79</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span><span class="sa">f</span><span class="s1">'</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s1"> = "</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s1">"."</span><span class="si">{</span><span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="si">}</span><span class="s1">"'</span><span class="p">)</span> -</span><span id="unnest-80"><a href="#unnest-80"><span class="linenos">80</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">on</span><span class="o">.</span><span class="n">right</span><span class="si">}</span><span class="s2"> IS NULL"</span><span class="p">)</span> -</span><span id="unnest-81"><a href="#unnest-81"><span class="linenos">81</span></a> -</span><span id="unnest-82"><a href="#unnest-82"><span class="linenos">82</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="unnest-83"><a href="#unnest-83"><span class="linenos">83</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="n">value</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="unnest-84"><a href="#unnest-84"><span class="linenos">84</span></a> <span class="n">on</span><span class="o">=</span><span class="n">on</span><span class="p">,</span> -</span><span id="unnest-85"><a href="#unnest-85"><span class="linenos">85</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> -</span><span id="unnest-86"><a href="#unnest-86"><span class="linenos">86</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> -</span><span id="unnest-87"><a href="#unnest-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="unnest-88"><a href="#unnest-88"><span class="linenos">88</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="unnest-40"><a href="#unnest-40"><span class="linenos">40</span></a><span class="k">def</span> <span class="nf">unnest</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">):</span> +</span><span id="unnest-41"><a href="#unnest-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span> +</span><span id="unnest-42"><a href="#unnest-42"><span class="linenos">42</span></a> <span class="k">return</span> +</span><span id="unnest-43"><a href="#unnest-43"><span class="linenos">43</span></a> +</span><span id="unnest-44"><a href="#unnest-44"><span class="linenos">44</span></a> <span class="n">predicate</span> <span class="o">=</span> <span class="n">select</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="unnest-45"><a href="#unnest-45"><span class="linenos">45</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">next_alias_name</span><span class="p">()</span> +</span><span id="unnest-46"><a href="#unnest-46"><span class="linenos">46</span></a> +</span><span id="unnest-47"><a href="#unnest-47"><span class="linenos">47</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> +</span><span id="unnest-48"><a href="#unnest-48"><span class="linenos">48</span></a> <span class="k">return</span> +</span><span id="unnest-49"><a href="#unnest-49"><span class="linenos">49</span></a> +</span><span id="unnest-50"><a href="#unnest-50"><span class="linenos">50</span></a> <span class="c1"># this subquery returns a scalar and can just be converted to a cross join</span> +</span><span id="unnest-51"><a href="#unnest-51"><span class="linenos">51</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">)):</span> +</span><span id="unnest-52"><a href="#unnest-52"><span class="linenos">52</span></a> <span class="n">having</span> <span class="o">=</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">Having</span><span class="p">)</span> +</span><span id="unnest-53"><a href="#unnest-53"><span class="linenos">53</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">select</span><span class="o">.</span><span class="n">selects</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 class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="unnest-54"><a href="#unnest-54"><span class="linenos">54</span></a> <span class="k">if</span> <span class="n">having</span> <span class="ow">and</span> <span class="n">having</span><span class="o">.</span><span class="n">parent_select</span> <span class="ow">is</span> <span class="n">parent_select</span><span class="p">:</span> +</span><span id="unnest-55"><a href="#unnest-55"><span class="linenos">55</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">column</span><span class="p">)</span> +</span><span id="unnest-56"><a href="#unnest-56"><span class="linenos">56</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="n">column</span><span class="p">)</span> +</span><span id="unnest-57"><a href="#unnest-57"><span class="linenos">57</span></a> +</span><span id="unnest-58"><a href="#unnest-58"><span class="linenos">58</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="unnest-59"><a href="#unnest-59"><span class="linenos">59</span></a> <span class="n">select</span><span class="p">,</span> +</span><span id="unnest-60"><a href="#unnest-60"><span class="linenos">60</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">,</span> +</span><span id="unnest-61"><a href="#unnest-61"><span class="linenos">61</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> +</span><span id="unnest-62"><a href="#unnest-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="unnest-63"><a href="#unnest-63"><span class="linenos">63</span></a> <span class="p">)</span> +</span><span id="unnest-64"><a href="#unnest-64"><span class="linenos">64</span></a> <span class="k">return</span> +</span><span id="unnest-65"><a href="#unnest-65"><span class="linenos">65</span></a> +</span><span id="unnest-66"><a href="#unnest-66"><span class="linenos">66</span></a> <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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> +</span><span id="unnest-67"><a href="#unnest-67"><span class="linenos">67</span></a> <span class="k">return</span> +</span><span id="unnest-68"><a href="#unnest-68"><span class="linenos">68</span></a> +</span><span id="unnest-69"><a href="#unnest-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> +</span><span id="unnest-70"><a href="#unnest-70"><span class="linenos">70</span></a> <span class="n">predicate</span> <span class="o">=</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">EQ</span><span class="p">)</span> +</span><span id="unnest-71"><a href="#unnest-71"><span class="linenos">71</span></a> +</span><span id="unnest-72"><a href="#unnest-72"><span class="linenos">72</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</span> <span class="n">parent_select</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">predicate</span><span class="o">.</span><span class="n">parent_select</span><span class="p">:</span> +</span><span id="unnest-73"><a href="#unnest-73"><span class="linenos">73</span></a> <span class="k">return</span> +</span><span id="unnest-74"><a href="#unnest-74"><span class="linenos">74</span></a> +</span><span id="unnest-75"><a href="#unnest-75"><span class="linenos">75</span></a> <span class="n">column</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span> +</span><span id="unnest-76"><a href="#unnest-76"><span class="linenos">76</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="unnest-77"><a href="#unnest-77"><span class="linenos">77</span></a> +</span><span id="unnest-78"><a href="#unnest-78"><span class="linenos">78</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">condition</span><span class="p">(</span><span class="sa">f</span><span class="s1">'</span><span class="si">{</span><span class="n">column</span><span class="si">}</span><span class="s1"> = "</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s1">"."</span><span class="si">{</span><span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="si">}</span><span class="s1">"'</span><span class="p">)</span> +</span><span id="unnest-79"><a href="#unnest-79"><span class="linenos">79</span></a> <span class="n">_replace</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">on</span><span class="o">.</span><span class="n">right</span><span class="si">}</span><span class="s2"> IS NULL"</span><span class="p">)</span> +</span><span id="unnest-80"><a href="#unnest-80"><span class="linenos">80</span></a> +</span><span id="unnest-81"><a href="#unnest-81"><span class="linenos">81</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="unnest-82"><a href="#unnest-82"><span class="linenos">82</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="n">value</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="unnest-83"><a href="#unnest-83"><span class="linenos">83</span></a> <span class="n">on</span><span class="o">=</span><span class="n">on</span><span class="p">,</span> +</span><span id="unnest-84"><a href="#unnest-84"><span class="linenos">84</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> +</span><span id="unnest-85"><a href="#unnest-85"><span class="linenos">85</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> +</span><span id="unnest-86"><a href="#unnest-86"><span class="linenos">86</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="unnest-87"><a href="#unnest-87"><span class="linenos">87</span></a> <span class="p">)</span> </span></pre></div> @@ -482,167 +477,167 @@ Convert correlated or vectorized subqueries into a group by so it is not a many <div class="attr function"> <span class="def">def</span> - <span class="name">decorrelate</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">select</span>, </span><span class="param"><span class="n">parent_select</span>, </span><span class="param"><span class="n">external_columns</span>, </span><span class="param"><span class="n">sequence</span></span><span class="return-annotation">):</span></span> + <span class="name">decorrelate</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">select</span>, </span><span class="param"><span class="n">parent_select</span>, </span><span class="param"><span class="n">external_columns</span>, </span><span class="param"><span class="n">next_alias_name</span></span><span class="return-annotation">):</span></span> <label class="view-source-button" for="decorrelate-view-source"><span>View Source</span></label> </div> <a class="headerlink" href="#decorrelate"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="decorrelate-91"><a href="#decorrelate-91"><span class="linenos"> 91</span></a><span class="k">def</span> <span class="nf">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">external_columns</span><span class="p">,</span> <span class="n">sequence</span><span class="p">):</span> -</span><span id="decorrelate-92"><a href="#decorrelate-92"><span class="linenos"> 92</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="decorrelate-93"><a href="#decorrelate-93"><span class="linenos"> 93</span></a> -</span><span id="decorrelate-94"><a href="#decorrelate-94"><span class="linenos"> 94</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="n">where</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">Or</span><span class="p">)</span> <span class="ow">or</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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> -</span><span id="decorrelate-95"><a href="#decorrelate-95"><span class="linenos"> 95</span></a> <span class="k">return</span> -</span><span id="decorrelate-96"><a href="#decorrelate-96"><span class="linenos"> 96</span></a> -</span><span id="decorrelate-97"><a href="#decorrelate-97"><span class="linenos"> 97</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span> -</span><span id="decorrelate-98"><a href="#decorrelate-98"><span class="linenos"> 98</span></a> <span class="n">keys</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="decorrelate-99"><a href="#decorrelate-99"><span class="linenos"> 99</span></a> -</span><span id="decorrelate-100"><a href="#decorrelate-100"><span class="linenos">100</span></a> <span class="c1"># for all external columns in the where statement, find the relevant predicate</span> -</span><span id="decorrelate-101"><a href="#decorrelate-101"><span class="linenos">101</span></a> <span class="c1"># keys to convert it into a join</span> -</span><span id="decorrelate-102"><a href="#decorrelate-102"><span class="linenos">102</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">external_columns</span><span class="p">:</span> -</span><span id="decorrelate-103"><a href="#decorrelate-103"><span class="linenos">103</span></a> <span class="k">if</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</span><span class="p">:</span> -</span><span id="decorrelate-104"><a href="#decorrelate-104"><span class="linenos">104</span></a> <span class="k">return</span> -</span><span id="decorrelate-105"><a href="#decorrelate-105"><span class="linenos">105</span></a> -</span><span id="decorrelate-106"><a href="#decorrelate-106"><span class="linenos">106</span></a> <span class="n">predicate</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">Predicate</span><span class="p">)</span> -</span><span id="decorrelate-107"><a href="#decorrelate-107"><span class="linenos">107</span></a> -</span><span id="decorrelate-108"><a href="#decorrelate-108"><span class="linenos">108</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</span><span class="p">:</span> -</span><span id="decorrelate-109"><a href="#decorrelate-109"><span class="linenos">109</span></a> <span class="k">return</span> -</span><span id="decorrelate-110"><a href="#decorrelate-110"><span class="linenos">110</span></a> -</span><span id="decorrelate-111"><a href="#decorrelate-111"><span class="linenos">111</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-112"><a href="#decorrelate-112"><span class="linenos">112</span></a> <span class="n">key</span> <span class="o">=</span> <span class="p">(</span> -</span><span id="decorrelate-113"><a href="#decorrelate-113"><span class="linenos">113</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">right</span> -</span><span id="decorrelate-114"><a href="#decorrelate-114"><span class="linenos">114</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">node</span> <span class="ow">is</span> <span class="n">column</span> <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="n">predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">walk</span><span class="p">())</span> -</span><span id="decorrelate-115"><a href="#decorrelate-115"><span class="linenos">115</span></a> <span class="k">else</span> <span class="n">predicate</span><span class="o">.</span><span class="n">left</span> -</span><span id="decorrelate-116"><a href="#decorrelate-116"><span class="linenos">116</span></a> <span class="p">)</span> -</span><span id="decorrelate-117"><a href="#decorrelate-117"><span class="linenos">117</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-118"><a href="#decorrelate-118"><span class="linenos">118</span></a> <span class="k">return</span> -</span><span id="decorrelate-119"><a href="#decorrelate-119"><span class="linenos">119</span></a> -</span><span id="decorrelate-120"><a href="#decorrelate-120"><span class="linenos">120</span></a> <span class="n">keys</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span><span class="p">))</span> -</span><span id="decorrelate-121"><a href="#decorrelate-121"><span class="linenos">121</span></a> -</span><span id="decorrelate-122"><a href="#decorrelate-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">):</span> -</span><span id="decorrelate-123"><a href="#decorrelate-123"><span class="linenos">123</span></a> <span class="k">return</span> -</span><span id="decorrelate-124"><a href="#decorrelate-124"><span class="linenos">124</span></a> -</span><span id="decorrelate-125"><a href="#decorrelate-125"><span class="linenos">125</span></a> <span class="n">is_subquery_projection</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="decorrelate-126"><a href="#decorrelate-126"><span class="linenos">126</span></a> <span class="n">node</span> <span class="ow">is</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">parent_select</span><span class="o">.</span><span class="n">selects</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">Subquery</span><span class="p">)</span> -</span><span id="decorrelate-127"><a href="#decorrelate-127"><span class="linenos">127</span></a> <span class="p">)</span> -</span><span id="decorrelate-128"><a href="#decorrelate-128"><span class="linenos">128</span></a> -</span><span id="decorrelate-129"><a href="#decorrelate-129"><span class="linenos">129</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="decorrelate-130"><a href="#decorrelate-130"><span class="linenos">130</span></a> <span class="n">key_aliases</span> <span class="o">=</span> <span class="p">{}</span> -</span><span id="decorrelate-131"><a href="#decorrelate-131"><span class="linenos">131</span></a> <span class="n">group_by</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="decorrelate-132"><a href="#decorrelate-132"><span class="linenos">132</span></a> -</span><span id="decorrelate-133"><a href="#decorrelate-133"><span class="linenos">133</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> -</span><span id="decorrelate-134"><a href="#decorrelate-134"><span class="linenos">134</span></a> <span class="c1"># if we filter on the value of the subquery, it needs to be unique</span> -</span><span id="decorrelate-135"><a href="#decorrelate-135"><span class="linenos">135</span></a> <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="decorrelate-136"><a href="#decorrelate-136"><span class="linenos">136</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span> -</span><span id="decorrelate-137"><a href="#decorrelate-137"><span class="linenos">137</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> -</span><span id="decorrelate-138"><a href="#decorrelate-138"><span class="linenos">138</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-139"><a href="#decorrelate-139"><span class="linenos">139</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="p">:</span> -</span><span id="decorrelate-140"><a href="#decorrelate-140"><span class="linenos">140</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">_alias</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span> -</span><span id="decorrelate-141"><a href="#decorrelate-141"><span class="linenos">141</span></a> <span class="c1"># all predicates that are equalities must also be in the unique</span> -</span><span id="decorrelate-142"><a href="#decorrelate-142"><span class="linenos">142</span></a> <span class="c1"># so that we don't do a many to many join</span> -</span><span id="decorrelate-143"><a href="#decorrelate-143"><span class="linenos">143</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="ow">and</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-144"><a href="#decorrelate-144"><span class="linenos">144</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> -</span><span id="decorrelate-145"><a href="#decorrelate-145"><span class="linenos">145</span></a> -</span><span id="decorrelate-146"><a href="#decorrelate-146"><span class="linenos">146</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">select</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">Predicate</span><span class="p">)</span> -</span><span id="decorrelate-147"><a href="#decorrelate-147"><span class="linenos">147</span></a> -</span><span id="decorrelate-148"><a href="#decorrelate-148"><span class="linenos">148</span></a> <span class="c1"># if the value of the subquery is not an agg or a key, we need to collect it into an array</span> -</span><span id="decorrelate-149"><a href="#decorrelate-149"><span class="linenos">149</span></a> <span class="c1"># so that it can be grouped. For subquery projections, we use a MAX aggregation instead.</span> -</span><span id="decorrelate-150"><a href="#decorrelate-150"><span class="linenos">150</span></a> <span class="n">agg_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span> <span class="k">if</span> <span class="n">is_subquery_projection</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArrayAgg</span> -</span><span id="decorrelate-151"><a href="#decorrelate-151"><span class="linenos">151</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">value</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="ow">and</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-152"><a href="#decorrelate-152"><span class="linenos">152</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span> -</span><span id="decorrelate-153"><a href="#decorrelate-153"><span class="linenos">153</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">),</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> -</span><span id="decorrelate-154"><a href="#decorrelate-154"><span class="linenos">154</span></a> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="decorrelate-155"><a href="#decorrelate-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="decorrelate-156"><a href="#decorrelate-156"><span class="linenos">156</span></a> <span class="p">)</span> -</span><span id="decorrelate-157"><a href="#decorrelate-157"><span class="linenos">157</span></a> -</span><span id="decorrelate-158"><a href="#decorrelate-158"><span class="linenos">158</span></a> <span class="c1"># exists queries should not have any selects as it only checks if there are any rows</span> -</span><span id="decorrelate-159"><a href="#decorrelate-159"><span class="linenos">159</span></a> <span class="c1"># all selects will be added by the optimizer and only used for join keys</span> -</span><span id="decorrelate-160"><a href="#decorrelate-160"><span class="linenos">160</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> -</span><span id="decorrelate-161"><a href="#decorrelate-161"><span class="linenos">161</span></a> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"expressions"</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="decorrelate-162"><a href="#decorrelate-162"><span class="linenos">162</span></a> -</span><span id="decorrelate-163"><a href="#decorrelate-163"><span class="linenos">163</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">alias</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> -</span><span id="decorrelate-164"><a href="#decorrelate-164"><span class="linenos">164</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-165"><a href="#decorrelate-165"><span class="linenos">165</span></a> <span class="c1"># add all keys to the projections of the subquery</span> -</span><span id="decorrelate-166"><a href="#decorrelate-166"><span class="linenos">166</span></a> <span class="c1"># so that we can use it as a join key</span> -</span><span id="decorrelate-167"><a href="#decorrelate-167"><span class="linenos">167</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">)</span> <span class="ow">or</span> <span class="n">key</span> <span class="o">!=</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="decorrelate-168"><a href="#decorrelate-168"><span class="linenos">168</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">key</span><span class="si">}</span><span class="s2"> AS </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</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="decorrelate-169"><a href="#decorrelate-169"><span class="linenos">169</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-170"><a href="#decorrelate-170"><span class="linenos">170</span></a> <span class="n">select</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">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">key</span><span class="o">.</span><span class="n">copy</span><span class="p">()),</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</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="decorrelate-171"><a href="#decorrelate-171"><span class="linenos">171</span></a> -</span><span id="decorrelate-172"><a href="#decorrelate-172"><span class="linenos">172</span></a> <span class="n">alias</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">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="decorrelate-173"><a href="#decorrelate-173"><span class="linenos">173</span></a> <span class="n">other</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">)</span> -</span><span id="decorrelate-174"><a href="#decorrelate-174"><span class="linenos">174</span></a> -</span><span id="decorrelate-175"><a href="#decorrelate-175"><span class="linenos">175</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> -</span><span id="decorrelate-176"><a href="#decorrelate-176"><span class="linenos">176</span></a> <span class="n">alias</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="nb">list</span><span class="p">(</span><span class="n">key_aliases</span><span class="o">.</span><span class="n">values</span><span class="p">())[</span><span class="mi">0</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="decorrelate-177"><a href="#decorrelate-177"><span class="linenos">177</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2"> IS NULL"</span><span class="p">)</span> -</span><span id="decorrelate-178"><a href="#decorrelate-178"><span class="linenos">178</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">):</span> -</span><span id="decorrelate-179"><a href="#decorrelate-179"><span class="linenos">179</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="decorrelate-180"><a href="#decorrelate-180"><span class="linenos">180</span></a> <span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ALL(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span> -</span><span id="decorrelate-181"><a href="#decorrelate-181"><span class="linenos">181</span></a> <span class="p">)</span> -</span><span id="decorrelate-182"><a href="#decorrelate-182"><span class="linenos">182</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> -</span><span id="decorrelate-183"><a href="#decorrelate-183"><span class="linenos">183</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-184"><a href="#decorrelate-184"><span class="linenos">184</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="decorrelate-185"><a href="#decorrelate-185"><span class="linenos">185</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-186"><a href="#decorrelate-186"><span class="linenos">186</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span><span class="p">)</span> -</span><span id="decorrelate-187"><a href="#decorrelate-187"><span class="linenos">187</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">):</span> -</span><span id="decorrelate-188"><a href="#decorrelate-188"><span class="linenos">188</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-189"><a href="#decorrelate-189"><span class="linenos">189</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> -</span><span id="decorrelate-190"><a href="#decorrelate-190"><span class="linenos">190</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-191"><a href="#decorrelate-191"><span class="linenos">191</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="decorrelate-192"><a href="#decorrelate-192"><span class="linenos">192</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="decorrelate-193"><a href="#decorrelate-193"><span class="linenos">193</span></a> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">this</span><span class="si">}</span><span class="s2">)"</span><span class="p">,</span> -</span><span id="decorrelate-194"><a href="#decorrelate-194"><span class="linenos">194</span></a> <span class="p">)</span> -</span><span id="decorrelate-195"><a href="#decorrelate-195"><span class="linenos">195</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-196"><a href="#decorrelate-196"><span class="linenos">196</span></a> <span class="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> -</span><span id="decorrelate-197"><a href="#decorrelate-197"><span class="linenos">197</span></a> <span class="n">alias</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">alias</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">)</span> -</span><span id="decorrelate-198"><a href="#decorrelate-198"><span class="linenos">198</span></a> -</span><span id="decorrelate-199"><a href="#decorrelate-199"><span class="linenos">199</span></a> <span class="c1"># COUNT always returns 0 on empty datasets, so we need take that into consideration here</span> -</span><span id="decorrelate-200"><a href="#decorrelate-200"><span class="linenos">200</span></a> <span class="c1"># by transforming all counts into 0 and using that as the coalesced value</span> -</span><span id="decorrelate-201"><a href="#decorrelate-201"><span class="linenos">201</span></a> <span class="k">if</span> <span class="n">value</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">Count</span><span class="p">):</span> -</span><span id="decorrelate-202"><a href="#decorrelate-202"><span class="linenos">202</span></a> -</span><span id="decorrelate-203"><a href="#decorrelate-203"><span class="linenos">203</span></a> <span class="k">def</span> <span class="nf">remove_aggs</span><span class="p">(</span><span class="n">node</span><span class="p">):</span> -</span><span id="decorrelate-204"><a href="#decorrelate-204"><span class="linenos">204</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">Count</span><span class="p">):</span> -</span><span id="decorrelate-205"><a href="#decorrelate-205"><span class="linenos">205</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="mi">0</span><span class="p">)</span> -</span><span id="decorrelate-206"><a href="#decorrelate-206"><span class="linenos">206</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">AggFunc</span><span class="p">):</span> -</span><span id="decorrelate-207"><a href="#decorrelate-207"><span class="linenos">207</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="decorrelate-208"><a href="#decorrelate-208"><span class="linenos">208</span></a> <span class="k">return</span> <span class="n">node</span> -</span><span id="decorrelate-209"><a href="#decorrelate-209"><span class="linenos">209</span></a> -</span><span id="decorrelate-210"><a href="#decorrelate-210"><span class="linenos">210</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span> -</span><span id="decorrelate-211"><a href="#decorrelate-211"><span class="linenos">211</span></a> <span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> -</span><span id="decorrelate-212"><a href="#decorrelate-212"><span class="linenos">212</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">remove_aggs</span><span class="p">)],</span> -</span><span id="decorrelate-213"><a href="#decorrelate-213"><span class="linenos">213</span></a> <span class="p">)</span> -</span><span id="decorrelate-214"><a href="#decorrelate-214"><span class="linenos">214</span></a> -</span><span id="decorrelate-215"><a href="#decorrelate-215"><span class="linenos">215</span></a> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> -</span><span id="decorrelate-216"><a href="#decorrelate-216"><span class="linenos">216</span></a> -</span><span id="decorrelate-217"><a href="#decorrelate-217"><span class="linenos">217</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> -</span><span id="decorrelate-218"><a href="#decorrelate-218"><span class="linenos">218</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="decorrelate-219"><a href="#decorrelate-219"><span class="linenos">219</span></a> <span class="n">nested</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">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> -</span><span id="decorrelate-220"><a href="#decorrelate-220"><span class="linenos">220</span></a> -</span><span id="decorrelate-221"><a href="#decorrelate-221"><span class="linenos">221</span></a> <span class="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> -</span><span id="decorrelate-222"><a href="#decorrelate-222"><span class="linenos">222</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> -</span><span id="decorrelate-223"><a href="#decorrelate-223"><span class="linenos">223</span></a> <span class="k">continue</span> -</span><span id="decorrelate-224"><a href="#decorrelate-224"><span class="linenos">224</span></a> -</span><span id="decorrelate-225"><a href="#decorrelate-225"><span class="linenos">225</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> -</span><span id="decorrelate-226"><a href="#decorrelate-226"><span class="linenos">226</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> -</span><span id="decorrelate-227"><a href="#decorrelate-227"><span class="linenos">227</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-228"><a href="#decorrelate-228"><span class="linenos">228</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="decorrelate-229"><a href="#decorrelate-229"><span class="linenos">229</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="decorrelate-230"><a href="#decorrelate-230"><span class="linenos">230</span></a> <span class="sa">f</span><span class="s2">"(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s2"> AND ARRAY_CONTAINS(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s2">, </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="decorrelate-231"><a href="#decorrelate-231"><span class="linenos">231</span></a> <span class="p">)</span> -</span><span id="decorrelate-232"><a href="#decorrelate-232"><span class="linenos">232</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="decorrelate-233"><a href="#decorrelate-233"><span class="linenos">233</span></a> <span class="n">key</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">to_identifier</span><span class="p">(</span><span class="s2">"_x"</span><span class="p">))</span> -</span><span id="decorrelate-234"><a href="#decorrelate-234"><span class="linenos">234</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> -</span><span id="decorrelate-235"><a href="#decorrelate-235"><span class="linenos">235</span></a> <span class="n">parent_predicate</span><span class="p">,</span> -</span><span id="decorrelate-236"><a href="#decorrelate-236"><span class="linenos">236</span></a> <span class="sa">f</span><span class="s1">'(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s1"> AND ARRAY_ANY(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s1">, "_x" -> </span><span class="si">{</span><span class="n">predicate</span><span class="si">}</span><span class="s1">))'</span><span class="p">,</span> -</span><span id="decorrelate-237"><a href="#decorrelate-237"><span class="linenos">237</span></a> <span class="p">)</span> -</span><span id="decorrelate-238"><a href="#decorrelate-238"><span class="linenos">238</span></a> -</span><span id="decorrelate-239"><a href="#decorrelate-239"><span class="linenos">239</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> -</span><span id="decorrelate-240"><a href="#decorrelate-240"><span class="linenos">240</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="o">*</span><span class="n">group_by</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="decorrelate-241"><a href="#decorrelate-241"><span class="linenos">241</span></a> <span class="n">on</span><span class="o">=</span><span class="p">[</span><span class="n">predicate</span> <span class="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-242"><a href="#decorrelate-242"><span class="linenos">242</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> -</span><span id="decorrelate-243"><a href="#decorrelate-243"><span class="linenos">243</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">table_alias</span><span class="p">,</span> -</span><span id="decorrelate-244"><a href="#decorrelate-244"><span class="linenos">244</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> -</span><span id="decorrelate-245"><a href="#decorrelate-245"><span class="linenos">245</span></a> <span class="p">)</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="decorrelate-90"><a href="#decorrelate-90"><span class="linenos"> 90</span></a><span class="k">def</span> <span class="nf">decorrelate</span><span class="p">(</span><span class="n">select</span><span class="p">,</span> <span class="n">parent_select</span><span class="p">,</span> <span class="n">external_columns</span><span class="p">,</span> <span class="n">next_alias_name</span><span class="p">):</span> +</span><span id="decorrelate-91"><a href="#decorrelate-91"><span class="linenos"> 91</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="decorrelate-92"><a href="#decorrelate-92"><span class="linenos"> 92</span></a> +</span><span id="decorrelate-93"><a href="#decorrelate-93"><span class="linenos"> 93</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="n">where</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">Or</span><span class="p">)</span> <span class="ow">or</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">Limit</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Offset</span><span class="p">):</span> +</span><span id="decorrelate-94"><a href="#decorrelate-94"><span class="linenos"> 94</span></a> <span class="k">return</span> +</span><span id="decorrelate-95"><a href="#decorrelate-95"><span class="linenos"> 95</span></a> +</span><span id="decorrelate-96"><a href="#decorrelate-96"><span class="linenos"> 96</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">next_alias_name</span><span class="p">()</span> +</span><span id="decorrelate-97"><a href="#decorrelate-97"><span class="linenos"> 97</span></a> <span class="n">keys</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="decorrelate-98"><a href="#decorrelate-98"><span class="linenos"> 98</span></a> +</span><span id="decorrelate-99"><a href="#decorrelate-99"><span class="linenos"> 99</span></a> <span class="c1"># for all external columns in the where statement, find the relevant predicate</span> +</span><span id="decorrelate-100"><a href="#decorrelate-100"><span class="linenos">100</span></a> <span class="c1"># keys to convert it into a join</span> +</span><span id="decorrelate-101"><a href="#decorrelate-101"><span class="linenos">101</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">external_columns</span><span class="p">:</span> +</span><span id="decorrelate-102"><a href="#decorrelate-102"><span class="linenos">102</span></a> <span class="k">if</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</span><span class="p">:</span> +</span><span id="decorrelate-103"><a href="#decorrelate-103"><span class="linenos">103</span></a> <span class="k">return</span> +</span><span id="decorrelate-104"><a href="#decorrelate-104"><span class="linenos">104</span></a> +</span><span id="decorrelate-105"><a href="#decorrelate-105"><span class="linenos">105</span></a> <span class="n">predicate</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">Predicate</span><span class="p">)</span> +</span><span id="decorrelate-106"><a href="#decorrelate-106"><span class="linenos">106</span></a> +</span><span id="decorrelate-107"><a href="#decorrelate-107"><span class="linenos">107</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">predicate</span> <span class="ow">or</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">Where</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">where</span><span class="p">:</span> +</span><span id="decorrelate-108"><a href="#decorrelate-108"><span class="linenos">108</span></a> <span class="k">return</span> +</span><span id="decorrelate-109"><a href="#decorrelate-109"><span class="linenos">109</span></a> +</span><span id="decorrelate-110"><a href="#decorrelate-110"><span class="linenos">110</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-111"><a href="#decorrelate-111"><span class="linenos">111</span></a> <span class="n">key</span> <span class="o">=</span> <span class="p">(</span> +</span><span id="decorrelate-112"><a href="#decorrelate-112"><span class="linenos">112</span></a> <span class="n">predicate</span><span class="o">.</span><span class="n">right</span> +</span><span id="decorrelate-113"><a href="#decorrelate-113"><span class="linenos">113</span></a> <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">node</span> <span class="ow">is</span> <span class="n">column</span> <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="n">predicate</span><span class="o">.</span><span class="n">left</span><span class="o">.</span><span class="n">walk</span><span class="p">())</span> +</span><span id="decorrelate-114"><a href="#decorrelate-114"><span class="linenos">114</span></a> <span class="k">else</span> <span class="n">predicate</span><span class="o">.</span><span class="n">left</span> +</span><span id="decorrelate-115"><a href="#decorrelate-115"><span class="linenos">115</span></a> <span class="p">)</span> +</span><span id="decorrelate-116"><a href="#decorrelate-116"><span class="linenos">116</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-117"><a href="#decorrelate-117"><span class="linenos">117</span></a> <span class="k">return</span> +</span><span id="decorrelate-118"><a href="#decorrelate-118"><span class="linenos">118</span></a> +</span><span id="decorrelate-119"><a href="#decorrelate-119"><span class="linenos">119</span></a> <span class="n">keys</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span><span class="p">))</span> +</span><span id="decorrelate-120"><a href="#decorrelate-120"><span class="linenos">120</span></a> +</span><span id="decorrelate-121"><a href="#decorrelate-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">):</span> +</span><span id="decorrelate-122"><a href="#decorrelate-122"><span class="linenos">122</span></a> <span class="k">return</span> +</span><span id="decorrelate-123"><a href="#decorrelate-123"><span class="linenos">123</span></a> +</span><span id="decorrelate-124"><a href="#decorrelate-124"><span class="linenos">124</span></a> <span class="n">is_subquery_projection</span> <span class="o">=</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="decorrelate-125"><a href="#decorrelate-125"><span class="linenos">125</span></a> <span class="n">node</span> <span class="ow">is</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span> <span class="k">for</span> <span class="n">node</span> <span class="ow">in</span> <span class="n">parent_select</span><span class="o">.</span><span class="n">selects</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">Subquery</span><span class="p">)</span> +</span><span id="decorrelate-126"><a href="#decorrelate-126"><span class="linenos">126</span></a> <span class="p">)</span> +</span><span id="decorrelate-127"><a href="#decorrelate-127"><span class="linenos">127</span></a> +</span><span id="decorrelate-128"><a href="#decorrelate-128"><span class="linenos">128</span></a> <span class="n">value</span> <span class="o">=</span> <span class="n">select</span><span class="o">.</span><span class="n">selects</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="decorrelate-129"><a href="#decorrelate-129"><span class="linenos">129</span></a> <span class="n">key_aliases</span> <span class="o">=</span> <span class="p">{}</span> +</span><span id="decorrelate-130"><a href="#decorrelate-130"><span class="linenos">130</span></a> <span class="n">group_by</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="decorrelate-131"><a href="#decorrelate-131"><span class="linenos">131</span></a> +</span><span id="decorrelate-132"><a href="#decorrelate-132"><span class="linenos">132</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> +</span><span id="decorrelate-133"><a href="#decorrelate-133"><span class="linenos">133</span></a> <span class="c1"># if we filter on the value of the subquery, it needs to be unique</span> +</span><span id="decorrelate-134"><a href="#decorrelate-134"><span class="linenos">134</span></a> <span class="k">if</span> <span class="n">key</span> <span class="o">==</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="decorrelate-135"><a href="#decorrelate-135"><span class="linenos">135</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span> +</span><span id="decorrelate-136"><a href="#decorrelate-136"><span class="linenos">136</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> +</span><span id="decorrelate-137"><a href="#decorrelate-137"><span class="linenos">137</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-138"><a href="#decorrelate-138"><span class="linenos">138</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="p">:</span> +</span><span id="decorrelate-139"><a href="#decorrelate-139"><span class="linenos">139</span></a> <span class="n">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">next_alias_name</span><span class="p">()</span> +</span><span id="decorrelate-140"><a href="#decorrelate-140"><span class="linenos">140</span></a> <span class="c1"># all predicates that are equalities must also be in the unique</span> +</span><span id="decorrelate-141"><a href="#decorrelate-141"><span class="linenos">141</span></a> <span class="c1"># so that we don't do a many to many join</span> +</span><span id="decorrelate-142"><a href="#decorrelate-142"><span class="linenos">142</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="ow">and</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-143"><a href="#decorrelate-143"><span class="linenos">143</span></a> <span class="n">group_by</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> +</span><span id="decorrelate-144"><a href="#decorrelate-144"><span class="linenos">144</span></a> +</span><span id="decorrelate-145"><a href="#decorrelate-145"><span class="linenos">145</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">select</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">Predicate</span><span class="p">)</span> +</span><span id="decorrelate-146"><a href="#decorrelate-146"><span class="linenos">146</span></a> +</span><span id="decorrelate-147"><a href="#decorrelate-147"><span class="linenos">147</span></a> <span class="c1"># if the value of the subquery is not an agg or a key, we need to collect it into an array</span> +</span><span id="decorrelate-148"><a href="#decorrelate-148"><span class="linenos">148</span></a> <span class="c1"># so that it can be grouped. For subquery projections, we use a MAX aggregation instead.</span> +</span><span id="decorrelate-149"><a href="#decorrelate-149"><span class="linenos">149</span></a> <span class="n">agg_func</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Max</span> <span class="k">if</span> <span class="n">is_subquery_projection</span> <span class="k">else</span> <span class="n">exp</span><span class="o">.</span><span class="n">ArrayAgg</span> +</span><span id="decorrelate-150"><a href="#decorrelate-150"><span class="linenos">150</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">value</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="ow">and</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-151"><a href="#decorrelate-151"><span class="linenos">151</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span> +</span><span id="decorrelate-152"><a href="#decorrelate-152"><span class="linenos">152</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">),</span> <span class="n">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> +</span><span id="decorrelate-153"><a href="#decorrelate-153"><span class="linenos">153</span></a> <span class="n">append</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="decorrelate-154"><a href="#decorrelate-154"><span class="linenos">154</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="decorrelate-155"><a href="#decorrelate-155"><span class="linenos">155</span></a> <span class="p">)</span> +</span><span id="decorrelate-156"><a href="#decorrelate-156"><span class="linenos">156</span></a> +</span><span id="decorrelate-157"><a href="#decorrelate-157"><span class="linenos">157</span></a> <span class="c1"># exists queries should not have any selects as it only checks if there are any rows</span> +</span><span id="decorrelate-158"><a href="#decorrelate-158"><span class="linenos">158</span></a> <span class="c1"># all selects will be added by the optimizer and only used for join keys</span> +</span><span id="decorrelate-159"><a href="#decorrelate-159"><span class="linenos">159</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> +</span><span id="decorrelate-160"><a href="#decorrelate-160"><span class="linenos">160</span></a> <span class="n">select</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"expressions"</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="decorrelate-161"><a href="#decorrelate-161"><span class="linenos">161</span></a> +</span><span id="decorrelate-162"><a href="#decorrelate-162"><span class="linenos">162</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">alias</span> <span class="ow">in</span> <span class="n">key_aliases</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> +</span><span id="decorrelate-163"><a href="#decorrelate-163"><span class="linenos">163</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-164"><a href="#decorrelate-164"><span class="linenos">164</span></a> <span class="c1"># add all keys to the projections of the subquery</span> +</span><span id="decorrelate-165"><a href="#decorrelate-165"><span class="linenos">165</span></a> <span class="c1"># so that we can use it as a join key</span> +</span><span id="decorrelate-166"><a href="#decorrelate-166"><span class="linenos">166</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">)</span> <span class="ow">or</span> <span class="n">key</span> <span class="o">!=</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="decorrelate-167"><a href="#decorrelate-167"><span class="linenos">167</span></a> <span class="n">select</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">key</span><span class="si">}</span><span class="s2"> AS </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</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="decorrelate-168"><a href="#decorrelate-168"><span class="linenos">168</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-169"><a href="#decorrelate-169"><span class="linenos">169</span></a> <span class="n">select</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">alias_</span><span class="p">(</span><span class="n">agg_func</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">key</span><span class="o">.</span><span class="n">copy</span><span class="p">()),</span> <span class="n">alias</span><span class="p">,</span> <span class="n">quoted</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="decorrelate-170"><a href="#decorrelate-170"><span class="linenos">170</span></a> +</span><span id="decorrelate-171"><a href="#decorrelate-171"><span class="linenos">171</span></a> <span class="n">alias</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">value</span><span class="o">.</span><span class="n">alias</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="decorrelate-172"><a href="#decorrelate-172"><span class="linenos">172</span></a> <span class="n">other</span> <span class="o">=</span> <span class="n">_other_operand</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">)</span> +</span><span id="decorrelate-173"><a href="#decorrelate-173"><span class="linenos">173</span></a> +</span><span id="decorrelate-174"><a href="#decorrelate-174"><span class="linenos">174</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Exists</span><span class="p">):</span> +</span><span id="decorrelate-175"><a href="#decorrelate-175"><span class="linenos">175</span></a> <span class="n">alias</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="nb">list</span><span class="p">(</span><span class="n">key_aliases</span><span class="o">.</span><span class="n">values</span><span class="p">())[</span><span class="mi">0</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="decorrelate-176"><a href="#decorrelate-176"><span class="linenos">176</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"NOT </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2"> IS NULL"</span><span class="p">)</span> +</span><span id="decorrelate-177"><a href="#decorrelate-177"><span class="linenos">177</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">All</span><span class="p">):</span> +</span><span id="decorrelate-178"><a href="#decorrelate-178"><span class="linenos">178</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="decorrelate-179"><a href="#decorrelate-179"><span class="linenos">179</span></a> <span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ALL(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span> +</span><span id="decorrelate-180"><a href="#decorrelate-180"><span class="linenos">180</span></a> <span class="p">)</span> +</span><span id="decorrelate-181"><a href="#decorrelate-181"><span class="linenos">181</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Any</span><span class="p">):</span> +</span><span id="decorrelate-182"><a href="#decorrelate-182"><span class="linenos">182</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-183"><a href="#decorrelate-183"><span class="linenos">183</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">parent</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="decorrelate-184"><a href="#decorrelate-184"><span class="linenos">184</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-185"><a href="#decorrelate-185"><span class="linenos">185</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">)"</span><span class="p">)</span> +</span><span id="decorrelate-186"><a href="#decorrelate-186"><span class="linenos">186</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">In</span><span class="p">):</span> +</span><span id="decorrelate-187"><a href="#decorrelate-187"><span class="linenos">187</span></a> <span class="k">if</span> <span class="n">value</span><span class="o">.</span><span class="n">this</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-188"><a href="#decorrelate-188"><span class="linenos">188</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span><span class="n">parent_predicate</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2"> = </span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> +</span><span id="decorrelate-189"><a href="#decorrelate-189"><span class="linenos">189</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-190"><a href="#decorrelate-190"><span class="linenos">190</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="decorrelate-191"><a href="#decorrelate-191"><span class="linenos">191</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="decorrelate-192"><a href="#decorrelate-192"><span class="linenos">192</span></a> <span class="sa">f</span><span class="s2">"ARRAY_ANY(</span><span class="si">{</span><span class="n">alias</span><span class="si">}</span><span class="s2">, _x -> _x = </span><span class="si">{</span><span class="n">parent_predicate</span><span class="o">.</span><span class="n">this</span><span class="si">}</span><span class="s2">)"</span><span class="p">,</span> +</span><span id="decorrelate-193"><a href="#decorrelate-193"><span class="linenos">193</span></a> <span class="p">)</span> +</span><span id="decorrelate-194"><a href="#decorrelate-194"><span class="linenos">194</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-195"><a href="#decorrelate-195"><span class="linenos">195</span></a> <span class="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> +</span><span id="decorrelate-196"><a href="#decorrelate-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">alias_</span><span class="p">(</span><span class="n">alias</span><span class="p">,</span> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span><span class="p">)</span> +</span><span id="decorrelate-197"><a href="#decorrelate-197"><span class="linenos">197</span></a> +</span><span id="decorrelate-198"><a href="#decorrelate-198"><span class="linenos">198</span></a> <span class="c1"># COUNT always returns 0 on empty datasets, so we need take that into consideration here</span> +</span><span id="decorrelate-199"><a href="#decorrelate-199"><span class="linenos">199</span></a> <span class="c1"># by transforming all counts into 0 and using that as the coalesced value</span> +</span><span id="decorrelate-200"><a href="#decorrelate-200"><span class="linenos">200</span></a> <span class="k">if</span> <span class="n">value</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">Count</span><span class="p">):</span> +</span><span id="decorrelate-201"><a href="#decorrelate-201"><span class="linenos">201</span></a> +</span><span id="decorrelate-202"><a href="#decorrelate-202"><span class="linenos">202</span></a> <span class="k">def</span> <span class="nf">remove_aggs</span><span class="p">(</span><span class="n">node</span><span class="p">):</span> +</span><span id="decorrelate-203"><a href="#decorrelate-203"><span class="linenos">203</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">Count</span><span class="p">):</span> +</span><span id="decorrelate-204"><a href="#decorrelate-204"><span class="linenos">204</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="mi">0</span><span class="p">)</span> +</span><span id="decorrelate-205"><a href="#decorrelate-205"><span class="linenos">205</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">AggFunc</span><span class="p">):</span> +</span><span id="decorrelate-206"><a href="#decorrelate-206"><span class="linenos">206</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="decorrelate-207"><a href="#decorrelate-207"><span class="linenos">207</span></a> <span class="k">return</span> <span class="n">node</span> +</span><span id="decorrelate-208"><a href="#decorrelate-208"><span class="linenos">208</span></a> +</span><span id="decorrelate-209"><a href="#decorrelate-209"><span class="linenos">209</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">Coalesce</span><span class="p">(</span> +</span><span id="decorrelate-210"><a href="#decorrelate-210"><span class="linenos">210</span></a> <span class="n">this</span><span class="o">=</span><span class="n">alias</span><span class="p">,</span> +</span><span id="decorrelate-211"><a href="#decorrelate-211"><span class="linenos">211</span></a> <span class="n">expressions</span><span class="o">=</span><span class="p">[</span><span class="n">value</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="n">remove_aggs</span><span class="p">)],</span> +</span><span id="decorrelate-212"><a href="#decorrelate-212"><span class="linenos">212</span></a> <span class="p">)</span> +</span><span id="decorrelate-213"><a href="#decorrelate-213"><span class="linenos">213</span></a> +</span><span id="decorrelate-214"><a href="#decorrelate-214"><span class="linenos">214</span></a> <span class="n">select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> +</span><span id="decorrelate-215"><a href="#decorrelate-215"><span class="linenos">215</span></a> +</span><span id="decorrelate-216"><a href="#decorrelate-216"><span class="linenos">216</span></a> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">column</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">:</span> +</span><span id="decorrelate-217"><a href="#decorrelate-217"><span class="linenos">217</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="decorrelate-218"><a href="#decorrelate-218"><span class="linenos">218</span></a> <span class="n">nested</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">key_aliases</span><span class="p">[</span><span class="n">key</span><span class="p">],</span> <span class="n">table_alias</span><span class="p">)</span> +</span><span id="decorrelate-219"><a href="#decorrelate-219"><span class="linenos">219</span></a> +</span><span id="decorrelate-220"><a href="#decorrelate-220"><span class="linenos">220</span></a> <span class="k">if</span> <span class="n">is_subquery_projection</span><span class="p">:</span> +</span><span id="decorrelate-221"><a href="#decorrelate-221"><span class="linenos">221</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> +</span><span id="decorrelate-222"><a href="#decorrelate-222"><span class="linenos">222</span></a> <span class="k">continue</span> +</span><span id="decorrelate-223"><a href="#decorrelate-223"><span class="linenos">223</span></a> +</span><span id="decorrelate-224"><a href="#decorrelate-224"><span class="linenos">224</span></a> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">group_by</span><span class="p">:</span> +</span><span id="decorrelate-225"><a href="#decorrelate-225"><span class="linenos">225</span></a> <span class="n">key</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">nested</span><span class="p">)</span> +</span><span id="decorrelate-226"><a href="#decorrelate-226"><span class="linenos">226</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-227"><a href="#decorrelate-227"><span class="linenos">227</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="decorrelate-228"><a href="#decorrelate-228"><span class="linenos">228</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="decorrelate-229"><a href="#decorrelate-229"><span class="linenos">229</span></a> <span class="sa">f</span><span class="s2">"(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s2"> AND ARRAY_CONTAINS(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s2">, </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="decorrelate-230"><a href="#decorrelate-230"><span class="linenos">230</span></a> <span class="p">)</span> +</span><span id="decorrelate-231"><a href="#decorrelate-231"><span class="linenos">231</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="decorrelate-232"><a href="#decorrelate-232"><span class="linenos">232</span></a> <span class="n">key</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">to_identifier</span><span class="p">(</span><span class="s2">"_x"</span><span class="p">))</span> +</span><span id="decorrelate-233"><a href="#decorrelate-233"><span class="linenos">233</span></a> <span class="n">parent_predicate</span> <span class="o">=</span> <span class="n">_replace</span><span class="p">(</span> +</span><span id="decorrelate-234"><a href="#decorrelate-234"><span class="linenos">234</span></a> <span class="n">parent_predicate</span><span class="p">,</span> +</span><span id="decorrelate-235"><a href="#decorrelate-235"><span class="linenos">235</span></a> <span class="sa">f</span><span class="s1">'(</span><span class="si">{</span><span class="n">parent_predicate</span><span class="si">}</span><span class="s1"> AND ARRAY_ANY(</span><span class="si">{</span><span class="n">nested</span><span class="si">}</span><span class="s1">, "_x" -> </span><span class="si">{</span><span class="n">predicate</span><span class="si">}</span><span class="s1">))'</span><span class="p">,</span> +</span><span id="decorrelate-236"><a href="#decorrelate-236"><span class="linenos">236</span></a> <span class="p">)</span> +</span><span id="decorrelate-237"><a href="#decorrelate-237"><span class="linenos">237</span></a> +</span><span id="decorrelate-238"><a href="#decorrelate-238"><span class="linenos">238</span></a> <span class="n">parent_select</span><span class="o">.</span><span class="n">join</span><span class="p">(</span> +</span><span id="decorrelate-239"><a href="#decorrelate-239"><span class="linenos">239</span></a> <span class="n">select</span><span class="o">.</span><span class="n">group_by</span><span class="p">(</span><span class="o">*</span><span class="n">group_by</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="decorrelate-240"><a href="#decorrelate-240"><span class="linenos">240</span></a> <span class="n">on</span><span class="o">=</span><span class="p">[</span><span class="n">predicate</span> <span class="k">for</span> <span class="o">*</span><span class="n">_</span><span class="p">,</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">keys</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">predicate</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="decorrelate-241"><a href="#decorrelate-241"><span class="linenos">241</span></a> <span class="n">join_type</span><span class="o">=</span><span class="s2">"LEFT"</span><span class="p">,</span> +</span><span id="decorrelate-242"><a href="#decorrelate-242"><span class="linenos">242</span></a> <span class="n">join_alias</span><span class="o">=</span><span class="n">table_alias</span><span class="p">,</span> +</span><span id="decorrelate-243"><a href="#decorrelate-243"><span class="linenos">243</span></a> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> +</span><span id="decorrelate-244"><a href="#decorrelate-244"><span class="linenos">244</span></a> <span class="p">)</span> </span></pre></div> |