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+ <a class="pdoc-button git-button" href="https://github.com/tobymao/sqlglot/tree/main/sqlglot/optimizer/qualify_tables.py">Edit on GitHub</a>
+ <h1 class="modulename">
+<a href="./../../sqlglot.html">sqlglot</a><wbr>.<a href="./../optimizer.html">optimizer</a><wbr>.qualify_tables </h1>
+
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+ <input id="mod-qualify_tables-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
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+ <label class="view-source-button" for="mod-qualify_tables-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">alias</span><span class="p">,</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.helper</span> <span class="kn">import</span> <span class="n">csv_reader</span>
+</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span>
+</span><span id="L-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><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="k">def</span> <span class="nf">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">catalog</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
+</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
+</span><span id="L-10"><a href="#L-10"><span class="linenos">10</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables.</span>
+</span><span id="L-11"><a href="#L-11"><span class="linenos">11</span></a>
+</span><span id="L-12"><a href="#L-12"><span class="linenos">12</span></a><span class="sd"> Example:</span>
+</span><span id="L-13"><a href="#L-13"><span class="linenos">13</span></a><span class="sd"> &gt;&gt;&gt; import sqlglot</span>
+</span><span id="L-14"><a href="#L-14"><span class="linenos">14</span></a><span class="sd"> &gt;&gt;&gt; expression = sqlglot.parse_one(&quot;SELECT 1 FROM tbl&quot;)</span>
+</span><span id="L-15"><a href="#L-15"><span class="linenos">15</span></a><span class="sd"> &gt;&gt;&gt; qualify_tables(expression, db=&quot;db&quot;).sql()</span>
+</span><span id="L-16"><a href="#L-16"><span class="linenos">16</span></a><span class="sd"> &#39;SELECT 1 FROM db.tbl AS tbl&#39;</span>
+</span><span id="L-17"><a href="#L-17"><span class="linenos">17</span></a>
+</span><span id="L-18"><a href="#L-18"><span class="linenos">18</span></a><span class="sd"> Args:</span>
+</span><span id="L-19"><a href="#L-19"><span class="linenos">19</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span>
+</span><span id="L-20"><a href="#L-20"><span class="linenos">20</span></a><span class="sd"> db (str): Database name</span>
+</span><span id="L-21"><a href="#L-21"><span class="linenos">21</span></a><span class="sd"> catalog (str): Catalog name</span>
+</span><span id="L-22"><a href="#L-22"><span class="linenos">22</span></a><span class="sd"> schema: A schema to populate</span>
+</span><span id="L-23"><a href="#L-23"><span class="linenos">23</span></a><span class="sd"> Returns:</span>
+</span><span id="L-24"><a href="#L-24"><span class="linenos">24</span></a><span class="sd"> sqlglot.Expression: qualified expression</span>
+</span><span id="L-25"><a href="#L-25"><span class="linenos">25</span></a><span class="sd"> &quot;&quot;&quot;</span>
+</span><span id="L-26"><a href="#L-26"><span class="linenos">26</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span>
+</span><span id="L-27"><a href="#L-27"><span class="linenos">27</span></a>
+</span><span id="L-28"><a href="#L-28"><span class="linenos">28</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">&quot;_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span>
+</span><span id="L-29"><a href="#L-29"><span class="linenos">29</span></a>
+</span><span id="L-30"><a href="#L-30"><span class="linenos">30</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
+</span><span id="L-31"><a href="#L-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">ctes</span> <span class="o">+</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span>
+</span><span id="L-32"><a href="#L-32"><span class="linenos">32</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">):</span>
+</span><span id="L-33"><a href="#L-33"><span class="linenos">33</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span>
+</span><span id="L-34"><a href="#L-34"><span class="linenos">34</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span>
+</span><span id="L-35"><a href="#L-35"><span class="linenos">35</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span>
+</span><span id="L-36"><a href="#L-36"><span class="linenos">36</span></a>
+</span><span id="L-37"><a href="#L-37"><span class="linenos">37</span></a> <span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
+</span><span id="L-38"><a href="#L-38"><span class="linenos">38</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span>
+</span><span id="L-39"><a href="#L-39"><span class="linenos">39</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">)</span>
+</span><span id="L-40"><a href="#L-40"><span class="linenos">40</span></a>
+</span><span id="L-41"><a href="#L-41"><span class="linenos">41</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="p">:</span>
+</span><span id="L-42"><a href="#L-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;db&quot;</span><span class="p">):</span>
+</span><span id="L-43"><a href="#L-43"><span class="linenos">43</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;db&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
+</span><span id="L-44"><a href="#L-44"><span class="linenos">44</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;catalog&quot;</span><span class="p">):</span>
+</span><span id="L-45"><a href="#L-45"><span class="linenos">45</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;catalog&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span>
+</span><span id="L-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">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
+</span><span id="L-48"><a href="#L-48"><span class="linenos">48</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
+</span><span id="L-49"><a href="#L-49"><span class="linenos">49</span></a> <span class="n">alias</span><span class="p">(</span>
+</span><span id="L-50"><a href="#L-50"><span class="linenos">50</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
+</span><span id="L-51"><a href="#L-51"><span class="linenos">51</span></a> <span class="n">source</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">identifier</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
+</span><span id="L-52"><a href="#L-52"><span class="linenos">52</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
+</span><span id="L-53"><a href="#L-53"><span class="linenos">53</span></a> <span class="p">)</span>
+</span><span id="L-54"><a href="#L-54"><span class="linenos">54</span></a> <span class="p">)</span>
+</span><span id="L-55"><a href="#L-55"><span class="linenos">55</span></a>
+</span><span id="L-56"><a href="#L-56"><span class="linenos">56</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
+</span><span id="L-57"><a href="#L-57"><span class="linenos">57</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
+</span><span id="L-58"><a href="#L-58"><span class="linenos">58</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
+</span><span id="L-59"><a href="#L-59"><span class="linenos">59</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
+</span><span id="L-60"><a href="#L-60"><span class="linenos">60</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
+</span><span id="L-61"><a href="#L-61"><span class="linenos">61</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
+</span><span id="L-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">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
+</span><span id="L-64"><a href="#L-64"><span class="linenos">64</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
+</span><span id="L-65"><a href="#L-65"><span class="linenos">65</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span>
+</span><span id="L-66"><a href="#L-66"><span class="linenos">66</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span>
+</span><span id="L-67"><a href="#L-67"><span class="linenos">67</span></a>
+</span><span id="L-68"><a href="#L-68"><span class="linenos">68</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
+</span><span id="L-69"><a href="#L-69"><span class="linenos">69</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;this&quot;</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
+</span><span id="L-70"><a href="#L-70"><span class="linenos">70</span></a>
+</span><span id="L-71"><a href="#L-71"><span class="linenos">71</span></a> <span class="k">return</span> <span class="n">expression</span>
+</span></pre></div>
+
+
+ </section>
+ <section id="qualify_tables">
+ <input id="qualify_tables-view-source" class="view-source-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
+<div class="attr function">
+
+ <span class="def">def</span>
+ <span class="name">qualify_tables</span><span class="signature pdoc-code condensed">(<span class="param"><span class="n">expression</span>, </span><span class="param"><span class="n">db</span><span class="o">=</span><span class="kc">None</span>, </span><span class="param"><span class="n">catalog</span><span class="o">=</span><span class="kc">None</span>, </span><span class="param"><span class="n">schema</span><span class="o">=</span><span class="kc">None</span></span><span class="return-annotation">):</span></span>
+
+ <label class="view-source-button" for="qualify_tables-view-source"><span>View Source</span></label>
+
+ </div>
+ <a class="headerlink" href="#qualify_tables"></a>
+ <div class="pdoc-code codehilite"><pre><span></span><span id="qualify_tables-9"><a href="#qualify_tables-9"><span class="linenos"> 9</span></a><span class="k">def</span> <span class="nf">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">catalog</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
+</span><span id="qualify_tables-10"><a href="#qualify_tables-10"><span class="linenos">10</span></a><span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
+</span><span id="qualify_tables-11"><a href="#qualify_tables-11"><span class="linenos">11</span></a><span class="sd"> Rewrite sqlglot AST to have fully qualified tables.</span>
+</span><span id="qualify_tables-12"><a href="#qualify_tables-12"><span class="linenos">12</span></a>
+</span><span id="qualify_tables-13"><a href="#qualify_tables-13"><span class="linenos">13</span></a><span class="sd"> Example:</span>
+</span><span id="qualify_tables-14"><a href="#qualify_tables-14"><span class="linenos">14</span></a><span class="sd"> &gt;&gt;&gt; import sqlglot</span>
+</span><span id="qualify_tables-15"><a href="#qualify_tables-15"><span class="linenos">15</span></a><span class="sd"> &gt;&gt;&gt; expression = sqlglot.parse_one(&quot;SELECT 1 FROM tbl&quot;)</span>
+</span><span id="qualify_tables-16"><a href="#qualify_tables-16"><span class="linenos">16</span></a><span class="sd"> &gt;&gt;&gt; qualify_tables(expression, db=&quot;db&quot;).sql()</span>
+</span><span id="qualify_tables-17"><a href="#qualify_tables-17"><span class="linenos">17</span></a><span class="sd"> &#39;SELECT 1 FROM db.tbl AS tbl&#39;</span>
+</span><span id="qualify_tables-18"><a href="#qualify_tables-18"><span class="linenos">18</span></a>
+</span><span id="qualify_tables-19"><a href="#qualify_tables-19"><span class="linenos">19</span></a><span class="sd"> Args:</span>
+</span><span id="qualify_tables-20"><a href="#qualify_tables-20"><span class="linenos">20</span></a><span class="sd"> expression (sqlglot.Expression): expression to qualify</span>
+</span><span id="qualify_tables-21"><a href="#qualify_tables-21"><span class="linenos">21</span></a><span class="sd"> db (str): Database name</span>
+</span><span id="qualify_tables-22"><a href="#qualify_tables-22"><span class="linenos">22</span></a><span class="sd"> catalog (str): Catalog name</span>
+</span><span id="qualify_tables-23"><a href="#qualify_tables-23"><span class="linenos">23</span></a><span class="sd"> schema: A schema to populate</span>
+</span><span id="qualify_tables-24"><a href="#qualify_tables-24"><span class="linenos">24</span></a><span class="sd"> Returns:</span>
+</span><span id="qualify_tables-25"><a href="#qualify_tables-25"><span class="linenos">25</span></a><span class="sd"> sqlglot.Expression: qualified expression</span>
+</span><span id="qualify_tables-26"><a href="#qualify_tables-26"><span class="linenos">26</span></a><span class="sd"> &quot;&quot;&quot;</span>
+</span><span id="qualify_tables-27"><a href="#qualify_tables-27"><span class="linenos">27</span></a> <span class="n">sequence</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">()</span>
+</span><span id="qualify_tables-28"><a href="#qualify_tables-28"><span class="linenos">28</span></a>
+</span><span id="qualify_tables-29"><a href="#qualify_tables-29"><span class="linenos">29</span></a> <span class="n">next_name</span> <span class="o">=</span> <span class="k">lambda</span><span class="p">:</span> <span class="sa">f</span><span class="s2">&quot;_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span>
+</span><span id="qualify_tables-30"><a href="#qualify_tables-30"><span class="linenos">30</span></a>
+</span><span id="qualify_tables-31"><a href="#qualify_tables-31"><span class="linenos">31</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">):</span>
+</span><span id="qualify_tables-32"><a href="#qualify_tables-32"><span class="linenos">32</span></a> <span class="k">for</span> <span class="n">derived_table</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">ctes</span> <span class="o">+</span> <span class="n">scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span>
+</span><span id="qualify_tables-33"><a href="#qualify_tables-33"><span class="linenos">33</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">derived_table</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">):</span>
+</span><span id="qualify_tables-34"><a href="#qualify_tables-34"><span class="linenos">34</span></a> <span class="n">alias_</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">&quot;_q_</span><span class="si">{</span><span class="nb">next</span><span class="p">(</span><span class="n">sequence</span><span class="p">)</span><span class="si">}</span><span class="s2">&quot;</span>
+</span><span id="qualify_tables-35"><a href="#qualify_tables-35"><span class="linenos">35</span></a> <span class="n">derived_table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias_</span><span class="p">)))</span>
+</span><span id="qualify_tables-36"><a href="#qualify_tables-36"><span class="linenos">36</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">alias_</span><span class="p">)</span>
+</span><span id="qualify_tables-37"><a href="#qualify_tables-37"><span class="linenos">37</span></a>
+</span><span id="qualify_tables-38"><a href="#qualify_tables-38"><span class="linenos">38</span></a> <span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
+</span><span id="qualify_tables-39"><a href="#qualify_tables-39"><span class="linenos">39</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span>
+</span><span id="qualify_tables-40"><a href="#qualify_tables-40"><span class="linenos">40</span></a> <span class="n">identifier</span> <span class="o">=</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Identifier</span><span class="p">)</span>
+</span><span id="qualify_tables-41"><a href="#qualify_tables-41"><span class="linenos">41</span></a>
+</span><span id="qualify_tables-42"><a href="#qualify_tables-42"><span class="linenos">42</span></a> <span class="k">if</span> <span class="n">identifier</span><span class="p">:</span>
+</span><span id="qualify_tables-43"><a href="#qualify_tables-43"><span class="linenos">43</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;db&quot;</span><span class="p">):</span>
+</span><span id="qualify_tables-44"><a href="#qualify_tables-44"><span class="linenos">44</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;db&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">db</span><span class="p">))</span>
+</span><span id="qualify_tables-45"><a href="#qualify_tables-45"><span class="linenos">45</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;catalog&quot;</span><span class="p">):</span>
+</span><span id="qualify_tables-46"><a href="#qualify_tables-46"><span class="linenos">46</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;catalog&quot;</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">catalog</span><span class="p">))</span>
+</span><span id="qualify_tables-47"><a href="#qualify_tables-47"><span class="linenos">47</span></a>
+</span><span id="qualify_tables-48"><a href="#qualify_tables-48"><span class="linenos">48</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span>
+</span><span id="qualify_tables-49"><a href="#qualify_tables-49"><span class="linenos">49</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span>
+</span><span id="qualify_tables-50"><a href="#qualify_tables-50"><span class="linenos">50</span></a> <span class="n">alias</span><span class="p">(</span>
+</span><span id="qualify_tables-51"><a href="#qualify_tables-51"><span class="linenos">51</span></a> <span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span>
+</span><span id="qualify_tables-52"><a href="#qualify_tables-52"><span class="linenos">52</span></a> <span class="n">source</span><span class="o">.</span><span class="n">this</span> <span class="k">if</span> <span class="n">identifier</span> <span class="k">else</span> <span class="n">next_name</span><span class="p">(),</span>
+</span><span id="qualify_tables-53"><a href="#qualify_tables-53"><span class="linenos">53</span></a> <span class="n">table</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
+</span><span id="qualify_tables-54"><a href="#qualify_tables-54"><span class="linenos">54</span></a> <span class="p">)</span>
+</span><span id="qualify_tables-55"><a href="#qualify_tables-55"><span class="linenos">55</span></a> <span class="p">)</span>
+</span><span id="qualify_tables-56"><a href="#qualify_tables-56"><span class="linenos">56</span></a>
+</span><span id="qualify_tables-57"><a href="#qualify_tables-57"><span class="linenos">57</span></a> <span class="k">if</span> <span class="n">schema</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">ReadCSV</span><span class="p">):</span>
+</span><span id="qualify_tables-58"><a href="#qualify_tables-58"><span class="linenos">58</span></a> <span class="k">with</span> <span class="n">csv_reader</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">this</span><span class="p">)</span> <span class="k">as</span> <span class="n">reader</span><span class="p">:</span>
+</span><span id="qualify_tables-59"><a href="#qualify_tables-59"><span class="linenos">59</span></a> <span class="n">header</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
+</span><span id="qualify_tables-60"><a href="#qualify_tables-60"><span class="linenos">60</span></a> <span class="n">columns</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="n">reader</span><span class="p">)</span>
+</span><span id="qualify_tables-61"><a href="#qualify_tables-61"><span class="linenos">61</span></a> <span class="n">schema</span><span class="o">.</span><span class="n">add_table</span><span class="p">(</span>
+</span><span id="qualify_tables-62"><a href="#qualify_tables-62"><span class="linenos">62</span></a> <span class="n">source</span><span class="p">,</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="nb">type</span><span class="p">(</span><span class="n">v</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">header</span><span class="p">,</span> <span class="n">columns</span><span class="p">)}</span>
+</span><span id="qualify_tables-63"><a href="#qualify_tables-63"><span class="linenos">63</span></a> <span class="p">)</span>
+</span><span id="qualify_tables-64"><a href="#qualify_tables-64"><span class="linenos">64</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">is_udtf</span><span class="p">:</span>
+</span><span id="qualify_tables-65"><a href="#qualify_tables-65"><span class="linenos">65</span></a> <span class="n">udtf</span> <span class="o">=</span> <span class="n">source</span><span class="o">.</span><span class="n">expression</span>
+</span><span id="qualify_tables-66"><a href="#qualify_tables-66"><span class="linenos">66</span></a> <span class="n">table_alias</span> <span class="o">=</span> <span class="n">udtf</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">)</span> <span class="ow">or</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">next_name</span><span class="p">())</span>
+</span><span id="qualify_tables-67"><a href="#qualify_tables-67"><span class="linenos">67</span></a> <span class="n">udtf</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;alias&quot;</span><span class="p">,</span> <span class="n">table_alias</span><span class="p">)</span>
+</span><span id="qualify_tables-68"><a href="#qualify_tables-68"><span class="linenos">68</span></a>
+</span><span id="qualify_tables-69"><a href="#qualify_tables-69"><span class="linenos">69</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">table_alias</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
+</span><span id="qualify_tables-70"><a href="#qualify_tables-70"><span class="linenos">70</span></a> <span class="n">table_alias</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">&quot;this&quot;</span><span class="p">,</span> <span class="n">next_name</span><span class="p">())</span>
+</span><span id="qualify_tables-71"><a href="#qualify_tables-71"><span class="linenos">71</span></a>
+</span><span id="qualify_tables-72"><a href="#qualify_tables-72"><span class="linenos">72</span></a> <span class="k">return</span> <span class="n">expression</span>
+</span></pre></div>
+
+
+ <div class="docstring"><p>Rewrite sqlglot AST to have fully qualified tables.</p>
+
+<h6 id="example">Example:</h6>
+
+<blockquote>
+ <div class="pdoc-code codehilite">
+<pre><span></span><code><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">sqlglot</span>
+<span class="gp">&gt;&gt;&gt; </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">&quot;SELECT 1 FROM tbl&quot;</span><span class="p">)</span>
+<span class="gp">&gt;&gt;&gt; </span><span class="n">qualify_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">db</span><span class="o">=</span><span class="s2">&quot;db&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span>
+<span class="go">&#39;SELECT 1 FROM db.tbl AS tbl&#39;</span>
+</code></pre>
+ </div>
+</blockquote>
+
+<h6 id="arguments">Arguments:</h6>
+
+<ul>
+<li><strong>expression (sqlglot.Expression):</strong> expression to qualify</li>
+<li><strong>db (str):</strong> Database name</li>
+<li><strong>catalog (str):</strong> Catalog name</li>
+<li><strong>schema:</strong> A schema to populate</li>
+</ul>
+
+<h6 id="returns">Returns:</h6>
+
+<blockquote>
+ <p>sqlglot.Expression: qualified expression</p>
+</blockquote>
+</div>
+
+
+ </section>
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