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diff --git a/docs/sqlglot/optimizer/merge_subqueries.html b/docs/sqlglot/optimizer/merge_subqueries.html index 1842f90..8081d87 100644 --- a/docs/sqlglot/optimizer/merge_subqueries.html +++ b/docs/sqlglot/optimizer/merge_subqueries.html @@ -3,7 +3,7 @@ <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> - <meta name="generator" content="pdoc 13.0.0"/> + <meta name="generator" content="pdoc 13.0.1"/> <title>sqlglot.optimizer.merge_subqueries API documentation</title> <style>/*! * Bootstrap Reboot v5.0.0 (https://getbootstrap.com/) * Copyright 2011-2021 The Bootstrap Authors * Copyright 2011-2021 Twitter, Inc. * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE) * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md) */*,::after,::before{box-sizing:border-box}@media 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1rem}img,svg{vertical-align:middle}table{caption-side:bottom;border-collapse:collapse}caption{padding-top:.5rem;padding-bottom:.5rem;color:#6c757d;text-align:left}th{text-align:inherit;text-align:-webkit-match-parent}tbody,td,tfoot,th,thead,tr{border-color:inherit;border-style:solid;border-width:0}label{display:inline-block}button{border-radius:0}button:focus:not(:focus-visible){outline:0}button,input,optgroup,select,textarea{margin:0;font-family:inherit;font-size:inherit;line-height:inherit}button,select{text-transform:none}[role=button]{cursor:pointer}select{word-wrap:normal}select:disabled{opacity:1}[list]::-webkit-calendar-picker-indicator{display:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]:not(:disabled),[type=reset]:not(:disabled),[type=submit]:not(:disabled),button:not(:disabled){cursor:pointer}::-moz-focus-inner{padding:0;border-style:none}textarea{resize:vertical}fieldset{min-width:0;padding:0;margin:0;border:0}legend{float:left;width:100%;padding:0;margin-bottom:.5rem;font-size:calc(1.275rem + .3vw);line-height:inherit}@media (min-width:1200px){legend{font-size:1.5rem}}legend+*{clear:left}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-fields-wrapper,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-text,::-webkit-datetime-edit-year-field{padding:0}::-webkit-inner-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:textfield}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-color-swatch-wrapper{padding:0}::file-selector-button{font:inherit}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}iframe{border:0}summary{display:list-item;cursor:pointer}progress{vertical-align:baseline}[hidden]{display:none!important}</style> @@ -28,8 +28,8 @@ - <h2>API Documentation</h2> - <ul class="memberlist"> + <h2>API Documentation</h2> + <ul class="memberlist"> <li> <a class="function" href="#merge_subqueries">merge_subqueries</a> </li> @@ -67,385 +67,384 @@ </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">expressions</span> <span class="k">as</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">find_new_name</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 class="kn">from</span> <span class="nn">sqlglot.optimizer.simplify</span> <span class="kn">import</span> <span class="n">simplify</span> +</span><span id="L-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><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="k">def</span> <span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</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"> This also merges CTEs if they are selected from only once.</span> -</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> -</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a><span class="sd"> Example:</span> -</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> -</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> -</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> -</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a> -</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> -</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> -</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> -</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> -</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</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="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> -</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a> -</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> Args:</span> -</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span> -</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> leave_tables_isolated (bool):</span> -</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> Returns:</span> -</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> -</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a><span class="sd"> """</span> -</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> -</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> -</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-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="k">def</span> <span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</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"> This also merges CTEs if they are selected from only once.</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 a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> +</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> +</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a> +</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> +</span><span id="L-21"><a href="#L-21"><span class="linenos"> 21</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> +</span><span id="L-22"><a href="#L-22"><span class="linenos"> 22</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="L-23"><a href="#L-23"><span class="linenos"> 23</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> +</span><span id="L-24"><a href="#L-24"><span class="linenos"> 24</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</span> +</span><span id="L-25"><a href="#L-25"><span class="linenos"> 25</span></a> +</span><span id="L-26"><a href="#L-26"><span class="linenos"> 26</span></a><span class="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> +</span><span id="L-27"><a href="#L-27"><span class="linenos"> 27</span></a> +</span><span id="L-28"><a href="#L-28"><span class="linenos"> 28</span></a><span class="sd"> Args:</span> +</span><span id="L-29"><a href="#L-29"><span class="linenos"> 29</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span> +</span><span id="L-30"><a href="#L-30"><span class="linenos"> 30</span></a><span class="sd"> leave_tables_isolated (bool):</span> +</span><span id="L-31"><a href="#L-31"><span class="linenos"> 31</span></a><span class="sd"> Returns:</span> +</span><span id="L-32"><a href="#L-32"><span class="linenos"> 32</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> +</span><span id="L-33"><a href="#L-33"><span class="linenos"> 33</span></a><span class="sd"> """</span> +</span><span id="L-34"><a href="#L-34"><span class="linenos"> 34</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> +</span><span id="L-35"><a href="#L-35"><span class="linenos"> 35</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> +</span><span id="L-36"><a href="#L-36"><span class="linenos"> 36</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-37"><a href="#L-37"><span class="linenos"> 37</span></a> </span><span id="L-38"><a href="#L-38"><span class="linenos"> 38</span></a> -</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a> -</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="c1"># If a derived table has these Select args, it can't be merged</span> -</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a><span class="n">UNMERGABLE_ARGS</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="o">.</span><span class="n">arg_types</span><span class="p">)</span> <span class="o">-</span> <span class="p">{</span> -</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="s2">"expressions"</span><span class="p">,</span> -</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="s2">"from"</span><span class="p">,</span> -</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="s2">"joins"</span><span class="p">,</span> -</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="s2">"where"</span><span class="p">,</span> -</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="s2">"order"</span><span class="p">,</span> -</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a> <span class="s2">"hint"</span><span class="p">,</span> -</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a><span class="p">}</span> +</span><span id="L-39"><a href="#L-39"><span class="linenos"> 39</span></a><span class="c1"># If a derived table has these Select args, it can't be merged</span> +</span><span id="L-40"><a href="#L-40"><span class="linenos"> 40</span></a><span class="n">UNMERGABLE_ARGS</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="o">.</span><span class="n">arg_types</span><span class="p">)</span> <span class="o">-</span> <span class="p">{</span> +</span><span id="L-41"><a href="#L-41"><span class="linenos"> 41</span></a> <span class="s2">"expressions"</span><span class="p">,</span> +</span><span id="L-42"><a href="#L-42"><span class="linenos"> 42</span></a> <span class="s2">"from"</span><span class="p">,</span> +</span><span id="L-43"><a href="#L-43"><span class="linenos"> 43</span></a> <span class="s2">"joins"</span><span class="p">,</span> +</span><span id="L-44"><a href="#L-44"><span class="linenos"> 44</span></a> <span class="s2">"where"</span><span class="p">,</span> +</span><span id="L-45"><a href="#L-45"><span class="linenos"> 45</span></a> <span class="s2">"order"</span><span class="p">,</span> +</span><span id="L-46"><a href="#L-46"><span class="linenos"> 46</span></a> <span class="s2">"hint"</span><span class="p">,</span> +</span><span id="L-47"><a href="#L-47"><span class="linenos"> 47</span></a><span class="p">}</span> +</span><span id="L-48"><a href="#L-48"><span class="linenos"> 48</span></a> </span><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><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a><span class="k">def</span> <span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> -</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="c1"># All places where we select from CTEs.</span> -</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="c1"># We key on the CTE scope so we can detect CTES that are selected from multiple times.</span> -</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="n">cte_selections</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> -</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">for</span> <span class="n">outer_scope</span> <span class="ow">in</span> <span class="n">scopes</span><span class="p">:</span> -</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">inner_scope</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="n">cte_selections</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="p">(</span> -</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">outer_scope</span><span class="p">,</span> -</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="n">inner_scope</span><span class="p">,</span> -</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="n">table</span><span class="p">,</span> -</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="p">)</span> -</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> <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="n">singular_cte_selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</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="n">cte_selections</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">]</span> -</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="k">for</span> <span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">singular_cte_selections</span><span class="p">:</span> -</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">table</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)</span> -</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-50"><a href="#L-50"><span class="linenos"> 50</span></a><span class="k">def</span> <span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-51"><a href="#L-51"><span class="linenos"> 51</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-52"><a href="#L-52"><span class="linenos"> 52</span></a> +</span><span id="L-53"><a href="#L-53"><span class="linenos"> 53</span></a> <span class="c1"># All places where we select from CTEs.</span> +</span><span id="L-54"><a href="#L-54"><span class="linenos"> 54</span></a> <span class="c1"># We key on the CTE scope so we can detect CTES that are selected from multiple times.</span> +</span><span id="L-55"><a href="#L-55"><span class="linenos"> 55</span></a> <span class="n">cte_selections</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> +</span><span id="L-56"><a href="#L-56"><span class="linenos"> 56</span></a> <span class="k">for</span> <span class="n">outer_scope</span> <span class="ow">in</span> <span class="n">scopes</span><span class="p">:</span> +</span><span id="L-57"><a href="#L-57"><span class="linenos"> 57</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">inner_scope</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-58"><a href="#L-58"><span class="linenos"> 58</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="L-59"><a href="#L-59"><span class="linenos"> 59</span></a> <span class="n">cte_selections</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="L-60"><a href="#L-60"><span class="linenos"> 60</span></a> <span class="p">(</span> +</span><span id="L-61"><a href="#L-61"><span class="linenos"> 61</span></a> <span class="n">outer_scope</span><span class="p">,</span> +</span><span id="L-62"><a href="#L-62"><span class="linenos"> 62</span></a> <span class="n">inner_scope</span><span class="p">,</span> +</span><span id="L-63"><a href="#L-63"><span class="linenos"> 63</span></a> <span class="n">table</span><span class="p">,</span> +</span><span id="L-64"><a href="#L-64"><span class="linenos"> 64</span></a> <span class="p">)</span> +</span><span id="L-65"><a href="#L-65"><span class="linenos"> 65</span></a> <span class="p">)</span> +</span><span id="L-66"><a href="#L-66"><span class="linenos"> 66</span></a> +</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a> <span class="n">singular_cte_selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</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="n">cte_selections</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">]</span> +</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a> <span class="k">for</span> <span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">singular_cte_selections</span><span class="p">:</span> +</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">table</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-74"><a href="#L-74"><span class="linenos"> 74</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-75"><a href="#L-75"><span class="linenos"> 75</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="L-76"><a href="#L-76"><span class="linenos"> 76</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="L-77"><a href="#L-77"><span class="linenos"> 77</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="L-78"><a href="#L-78"><span class="linenos"> 78</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="L-79"><a href="#L-79"><span class="linenos"> 79</span></a> <span class="n">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)</span> +</span><span id="L-80"><a href="#L-80"><span class="linenos"> 80</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> </span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a><span class="k">def</span> <span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</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="k">for</span> <span class="n">outer_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-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">subquery</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">inner_scope</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">subquery</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a><span class="k">def</span> <span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">for</span> <span class="n">outer_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-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">subquery</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="n">inner_scope</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">subquery</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> </span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a><span class="k">def</span> <span class="nf">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a><span class="sd"> Return True if `inner_select` can be merged into outer query.</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="sd"> Args:</span> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a><span class="sd"> outer_scope (Scope)</span> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a><span class="sd"> inner_scope (Scope)</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a><span class="sd"> leave_tables_isolated (bool)</span> -</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a><span class="sd"> Returns:</span> -</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a><span class="sd"> bool: True if can be merged</span> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a><span class="sd"> """</span> -</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">inner_select</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> -</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="k">def</span> <span class="nf">_is_a_window_expression_in_unmergable_operation</span><span class="p">():</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">window_expressions</span> <span class="o">=</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">window_alias_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">window</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">window</span> <span class="ow">in</span> <span class="n">window_expressions</span><span class="p">}</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">inner_select_name</span> <span class="o">=</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">unmergable_window_columns</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="n">column</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</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><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Group</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</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 class="p">]</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">window_expressions_in_unmergable</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">column</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unmergable_window_columns</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">inner_select_name</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">window_alias_names</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="p">]</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="k">return</span> <span class="nb">any</span><span class="p">(</span><span class="n">window_expressions_in_unmergable</span><span class="p">)</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> <span class="k">def</span> <span class="nf">_outer_select_joins_on_inner_select_join</span><span class="p">():</span> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="sd"> All columns from the inner select in the ON clause must be from the first FROM table.</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> That is, this can be merged:</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a><span class="sd"> SELECT * FROM x JOIN (SELECT y.a AS a FROM y JOIN z) AS q ON x.a = q.a</span> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> ^^^ ^</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a><span class="sd"> But this can't:</span> -</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> SELECT * FROM x JOIN (SELECT z.a AS a FROM y JOIN z) AS q ON x.a = q.a</span> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="sd"> ^^^ ^</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="sd"> """</span> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="k">return</span> <span class="kc">False</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> -</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">on</span><span class="p">:</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">return</span> <span class="kc">False</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">]</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="n">inner_from</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_from</span><span class="p">:</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">return</span> <span class="kc">False</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">inner_from_table</span> <span class="o">=</span> <span class="n">inner_from</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">inner_projections</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">s</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selects</span><span class="p">}</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="k">return</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">col</span><span class="o">.</span><span class="n">table</span> <span class="o">!=</span> <span class="n">inner_from_table</span> -</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">selections</span> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">inner_projections</span><span class="p">[</span><span class="n">selection</span><span class="p">]</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> -</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> <span class="p">)</span> -</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> -</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="k">return</span> <span class="p">(</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">UNMERGABLE_ARGS</span><span class="p">)</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span><span class="n">leave_tables_isolated</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">)</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="ow">and</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"LEFT"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="p">)</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> -</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> -</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="n">j</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="p">)</span> -</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="p">)</span> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_outer_select_joins_on_inner_select_join</span><span class="p">()</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_is_a_window_expression_in_unmergable_operation</span><span class="p">()</span> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="p">)</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a><span class="k">def</span> <span class="nf">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a><span class="sd"> Return True if `inner_select` can be merged into outer query.</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="sd"> Args:</span> +</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a><span class="sd"> outer_scope (Scope)</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a><span class="sd"> inner_scope (Scope)</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a><span class="sd"> leave_tables_isolated (bool)</span> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> +</span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a><span class="sd"> Returns:</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a><span class="sd"> bool: True if can be merged</span> +</span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a><span class="sd"> """</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">inner_select</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">unnest</span><span class="p">()</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="k">def</span> <span class="nf">_is_a_window_expression_in_unmergable_operation</span><span class="p">():</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">window_expressions</span> <span class="o">=</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Window</span><span class="p">)</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">window_alias_names</span> <span class="o">=</span> <span class="p">{</span><span class="n">window</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">window</span> <span class="ow">in</span> <span class="n">window_expressions</span><span class="p">}</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">inner_select_name</span> <span class="o">=</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="n">unmergable_window_columns</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="n">column</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</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><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">Where</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Group</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Order</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Having</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</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 class="p">]</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">window_expressions_in_unmergable</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">column</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">unmergable_window_columns</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">inner_select_name</span> <span class="ow">and</span> <span class="n">column</span><span class="o">.</span><span class="n">name</span> <span class="ow">in</span> <span class="n">window_alias_names</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="p">]</span> +</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="k">return</span> <span class="nb">any</span><span class="p">(</span><span class="n">window_expressions_in_unmergable</span><span class="p">)</span> +</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> +</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="k">def</span> <span class="nf">_outer_select_joins_on_inner_select_join</span><span class="p">():</span> +</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a><span class="sd"> All columns from the inner select in the ON clause must be from the first FROM table.</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> +</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a><span class="sd"> That is, this can be merged:</span> +</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a><span class="sd"> SELECT * FROM x JOIN (SELECT y.a AS a FROM y JOIN z) AS q ON x.a = q.a</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a><span class="sd"> ^^^ ^</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a><span class="sd"> But this can't:</span> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a><span class="sd"> SELECT * FROM x JOIN (SELECT z.a AS a FROM y JOIN z) AS q ON x.a = q.a</span> +</span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a><span class="sd"> ^^^ ^</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a><span class="sd"> """</span> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="k">return</span> <span class="kc">False</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> +</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">this</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">on</span> <span class="o">=</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)</span> +</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">on</span><span class="p">:</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="k">return</span> <span class="kc">False</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="n">selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">c</span><span class="o">.</span><span class="n">name</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">on</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> <span class="k">if</span> <span class="n">c</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">]</span> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">inner_from</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_from</span><span class="p">:</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">return</span> <span class="kc">False</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="n">inner_from_table</span> <span class="o">=</span> <span class="n">inner_from</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">inner_projections</span> <span class="o">=</span> <span class="p">{</span><span class="n">s</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> <span class="n">s</span> <span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selects</span><span class="p">}</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">return</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">col</span><span class="o">.</span><span class="n">table</span> <span class="o">!=</span> <span class="n">inner_from_table</span> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="k">for</span> <span class="n">selection</span> <span class="ow">in</span> <span class="n">selections</span> +</span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">inner_projections</span><span class="p">[</span><span class="n">selection</span><span class="p">]</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Column</span><span class="p">)</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="p">)</span> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a> <span class="k">return</span> <span class="p">(</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_select</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">UNMERGABLE_ARGS</span><span class="p">)</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Select</span><span class="p">)</span> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span><span class="n">leave_tables_isolated</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">)</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="ow">and</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"LEFT"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="p">)</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">)</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="ow">and</span> <span class="n">inner_select</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">j</span><span class="o">.</span><span class="n">side</span> <span class="ow">in</span> <span class="p">{</span><span class="s2">"FULL"</span><span class="p">,</span> <span class="s2">"RIGHT"</span><span class="p">}</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="p">)</span> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="p">)</span> +</span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_outer_select_joins_on_inner_select_join</span><span class="p">()</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="ow">and</span> <span class="ow">not</span> <span class="n">_is_a_window_expression_in_unmergable_operation</span><span class="p">()</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="p">)</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> </span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a><span class="k">def</span> <span class="nf">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a><span class="sd"> Renames any sources in the inner query that conflict with names in the outer query.</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a><span class="sd"> Args:</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a><span class="sd"> alias (str)</span> -</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a><span class="sd"> """</span> -</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> -</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">conflicts</span> <span class="o">=</span> <span class="n">taken</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">))</span> -</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> <span class="n">conflicts</span> <span class="o">-=</span> <span class="p">{</span><span class="n">alias</span><span class="p">}</span> -</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> -</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="k">for</span> <span class="n">conflict</span> <span class="ow">in</span> <span class="n">conflicts</span><span class="p">:</span> -</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> <span class="n">new_name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="n">conflict</span><span class="p">)</span> -</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> -</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">source</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">conflict</span><span class="p">]</span> -</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> <span class="n">new_alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">)</span> -</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> -</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> -</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">new_alias</span><span class="p">))</span> -</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> -</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">new_alias</span><span class="p">)</span> -</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> -</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">new_alias</span><span class="p">))</span> -</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> -</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">source_columns</span><span class="p">(</span><span class="n">conflict</span><span class="p">):</span> -</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">))</span> -</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> -</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> <span class="n">inner_scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="n">conflict</span><span class="p">,</span> <span class="n">new_name</span><span class="p">)</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a><span class="k">def</span> <span class="nf">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a><span class="sd"> Renames any sources in the inner query that conflict with names in the outer query.</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a><span class="sd"> Args:</span> +</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-196"><a href="#L-196"><span class="linenos">196</span></a><span class="sd"> alias (str)</span> +</span><span id="L-197"><a href="#L-197"><span class="linenos">197</span></a><span class="sd"> """</span> +</span><span id="L-198"><a href="#L-198"><span class="linenos">198</span></a> <span class="n">taken</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> +</span><span id="L-199"><a href="#L-199"><span class="linenos">199</span></a> <span class="n">conflicts</span> <span class="o">=</span> <span class="n">taken</span><span class="o">.</span><span class="n">intersection</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">))</span> +</span><span id="L-200"><a href="#L-200"><span class="linenos">200</span></a> <span class="n">conflicts</span> <span class="o">-=</span> <span class="p">{</span><span class="n">alias</span><span class="p">}</span> +</span><span id="L-201"><a href="#L-201"><span class="linenos">201</span></a> +</span><span id="L-202"><a href="#L-202"><span class="linenos">202</span></a> <span class="k">for</span> <span class="n">conflict</span> <span class="ow">in</span> <span class="n">conflicts</span><span class="p">:</span> +</span><span id="L-203"><a href="#L-203"><span class="linenos">203</span></a> <span class="n">new_name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="p">,</span> <span class="n">conflict</span><span class="p">)</span> +</span><span id="L-204"><a href="#L-204"><span class="linenos">204</span></a> +</span><span id="L-205"><a href="#L-205"><span class="linenos">205</span></a> <span class="n">source</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">[</span><span class="n">conflict</span><span class="p">]</span> +</span><span id="L-206"><a href="#L-206"><span class="linenos">206</span></a> <span class="n">new_alias</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">)</span> +</span><span id="L-207"><a href="#L-207"><span class="linenos">207</span></a> +</span><span id="L-208"><a href="#L-208"><span class="linenos">208</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">):</span> +</span><span id="L-209"><a href="#L-209"><span class="linenos">209</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">new_alias</span><span class="p">))</span> +</span><span id="L-210"><a href="#L-210"><span class="linenos">210</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> <span class="ow">and</span> <span class="n">source</span><span class="o">.</span><span class="n">alias</span><span class="p">:</span> +</span><span id="L-211"><a href="#L-211"><span class="linenos">211</span></a> <span class="n">source</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"alias"</span><span class="p">,</span> <span class="n">new_alias</span><span class="p">)</span> +</span><span id="L-212"><a href="#L-212"><span class="linenos">212</span></a> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">source</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">):</span> +</span><span id="L-213"><a href="#L-213"><span class="linenos">213</span></a> <span class="n">source</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">source</span><span class="o">.</span><span class="n">copy</span><span class="p">(),</span> <span class="n">new_alias</span><span class="p">))</span> +</span><span id="L-214"><a href="#L-214"><span class="linenos">214</span></a> +</span><span id="L-215"><a href="#L-215"><span class="linenos">215</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">source_columns</span><span class="p">(</span><span class="n">conflict</span><span class="p">):</span> +</span><span id="L-216"><a href="#L-216"><span class="linenos">216</span></a> <span class="n">column</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"table"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_name</span><span class="p">))</span> +</span><span id="L-217"><a href="#L-217"><span class="linenos">217</span></a> +</span><span id="L-218"><a href="#L-218"><span class="linenos">218</span></a> <span class="n">inner_scope</span><span class="o">.</span><span class="n">rename_source</span><span class="p">(</span><span class="n">conflict</span><span class="p">,</span> <span class="n">new_name</span><span class="p">)</span> +</span><span id="L-219"><a href="#L-219"><span class="linenos">219</span></a> </span><span id="L-220"><a href="#L-220"><span class="linenos">220</span></a> -</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> -</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a><span class="k">def</span> <span class="nf">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">node_to_replace</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="sd"> Merge FROM clause of inner query into outer query.</span> -</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a> -</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a><span class="sd"> Args:</span> -</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a><span class="sd"> node_to_replace (exp.Subquery|exp.Table)</span> -</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> alias (str)</span> -</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a><span class="sd"> """</span> -</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">new_subquery</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> -</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_subquery</span><span class="p">)</span> -</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="k">for</span> <span class="n">join_hint</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">join_hints</span><span class="p">:</span> -</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">join_hint</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> -</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> -</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="o">==</span> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> -</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">))</span> -</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">remove_source</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> -</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span> -</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> -</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> <span class="p">)</span> +</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a><span class="k">def</span> <span class="nf">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">node_to_replace</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a><span class="sd"> Merge FROM clause of inner query into outer query.</span> +</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a> +</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a><span class="sd"> Args:</span> +</span><span id="L-226"><a href="#L-226"><span class="linenos">226</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-228"><a href="#L-228"><span class="linenos">228</span></a><span class="sd"> node_to_replace (exp.Subquery|exp.Table)</span> +</span><span id="L-229"><a href="#L-229"><span class="linenos">229</span></a><span class="sd"> alias (str)</span> +</span><span id="L-230"><a href="#L-230"><span class="linenos">230</span></a><span class="sd"> """</span> +</span><span id="L-231"><a href="#L-231"><span class="linenos">231</span></a> <span class="n">new_subquery</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> +</span><span id="L-232"><a href="#L-232"><span class="linenos">232</span></a> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_subquery</span><span class="p">)</span> +</span><span id="L-233"><a href="#L-233"><span class="linenos">233</span></a> <span class="k">for</span> <span class="n">join_hint</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">join_hints</span><span class="p">:</span> +</span><span id="L-234"><a href="#L-234"><span class="linenos">234</span></a> <span class="n">tables</span> <span class="o">=</span> <span class="n">join_hint</span><span class="o">.</span><span class="n">find_all</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">)</span> +</span><span id="L-235"><a href="#L-235"><span class="linenos">235</span></a> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span> +</span><span id="L-236"><a href="#L-236"><span class="linenos">236</span></a> <span class="k">if</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="o">==</span> <span class="n">node_to_replace</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> +</span><span id="L-237"><a href="#L-237"><span class="linenos">237</span></a> <span class="n">table</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"this"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">))</span> +</span><span id="L-238"><a href="#L-238"><span class="linenos">238</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">remove_source</span><span class="p">(</span><span class="n">alias</span><span class="p">)</span> +</span><span id="L-239"><a href="#L-239"><span class="linenos">239</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span> +</span><span id="L-240"><a href="#L-240"><span class="linenos">240</span></a> <span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">new_subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">]</span> +</span><span id="L-241"><a href="#L-241"><span class="linenos">241</span></a> <span class="p">)</span> +</span><span id="L-242"><a href="#L-242"><span class="linenos">242</span></a> </span><span id="L-243"><a href="#L-243"><span class="linenos">243</span></a> -</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a> -</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="k">def</span> <span class="nf">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a><span class="sd"> Merge JOIN clauses of inner query into outer query.</span> -</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a> -</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> Args:</span> -</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> -</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a><span class="sd"> """</span> -</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> -</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">new_joins</span> <span class="o">=</span> <span class="p">[]</span> -</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">comma_joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span> -</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">comma_joins</span><span class="p">:</span> -</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">,</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">))</span> -</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> -</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> -</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> -</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> -</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> -</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> -</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> -</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span> -</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> <span class="n">outer_joins</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> -</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="c1"># Maintain the join order</span> -</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> -</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="n">position</span> <span class="o">=</span> <span class="mi">0</span> -</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">position</span> <span class="o">=</span> <span class="n">outer_joins</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> -</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="n">outer_joins</span><span class="p">[</span><span class="n">position</span><span class="p">:</span><span class="n">position</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_joins</span> -</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> -</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="n">outer_joins</span><span class="p">)</span> +</span><span id="L-244"><a href="#L-244"><span class="linenos">244</span></a><span class="k">def</span> <span class="nf">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-245"><a href="#L-245"><span class="linenos">245</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-246"><a href="#L-246"><span class="linenos">246</span></a><span class="sd"> Merge JOIN clauses of inner query into outer query.</span> +</span><span id="L-247"><a href="#L-247"><span class="linenos">247</span></a> +</span><span id="L-248"><a href="#L-248"><span class="linenos">248</span></a><span class="sd"> Args:</span> +</span><span id="L-249"><a href="#L-249"><span class="linenos">249</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-250"><a href="#L-250"><span class="linenos">250</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-251"><a href="#L-251"><span class="linenos">251</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> +</span><span id="L-252"><a href="#L-252"><span class="linenos">252</span></a><span class="sd"> """</span> +</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a> +</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a> <span class="n">new_joins</span> <span class="o">=</span> <span class="p">[]</span> +</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">comma_joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span><span class="o">.</span><span class="n">expressions</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span> +</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">comma_joins</span><span class="p">:</span> +</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">subquery</span><span class="p">,</span> <span class="n">kind</span><span class="o">=</span><span class="s2">"CROSS"</span><span class="p">))</span> +</span><span id="L-258"><a href="#L-258"><span class="linenos">258</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> +</span><span id="L-259"><a href="#L-259"><span class="linenos">259</span></a> +</span><span id="L-260"><a href="#L-260"><span class="linenos">260</span></a> <span class="n">joins</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">)</span> <span class="ow">or</span> <span class="p">[]</span> +</span><span id="L-261"><a href="#L-261"><span class="linenos">261</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">joins</span><span class="p">:</span> +</span><span id="L-262"><a href="#L-262"><span class="linenos">262</span></a> <span class="n">new_joins</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">join</span><span class="p">)</span> +</span><span id="L-263"><a href="#L-263"><span class="linenos">263</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">add_source</span><span class="p">(</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">])</span> +</span><span id="L-264"><a href="#L-264"><span class="linenos">264</span></a> +</span><span id="L-265"><a href="#L-265"><span class="linenos">265</span></a> <span class="k">if</span> <span class="n">new_joins</span><span class="p">:</span> +</span><span id="L-266"><a href="#L-266"><span class="linenos">266</span></a> <span class="n">outer_joins</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-267"><a href="#L-267"><span class="linenos">267</span></a> +</span><span id="L-268"><a href="#L-268"><span class="linenos">268</span></a> <span class="c1"># Maintain the join order</span> +</span><span id="L-269"><a href="#L-269"><span class="linenos">269</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">From</span><span class="p">):</span> +</span><span id="L-270"><a href="#L-270"><span class="linenos">270</span></a> <span class="n">position</span> <span class="o">=</span> <span class="mi">0</span> +</span><span id="L-271"><a href="#L-271"><span class="linenos">271</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-272"><a href="#L-272"><span class="linenos">272</span></a> <span class="n">position</span> <span class="o">=</span> <span class="n">outer_joins</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span> +</span><span id="L-273"><a href="#L-273"><span class="linenos">273</span></a> <span class="n">outer_joins</span><span class="p">[</span><span class="n">position</span><span class="p">:</span><span class="n">position</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_joins</span> +</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> +</span><span id="L-275"><a href="#L-275"><span class="linenos">275</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"joins"</span><span class="p">,</span> <span class="n">outer_joins</span><span class="p">)</span> +</span><span id="L-276"><a href="#L-276"><span class="linenos">276</span></a> </span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a> -</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a> -</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="k">def</span> <span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> -</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a><span class="sd"> Merge projections of inner query into outer query.</span> -</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a> -</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> Args:</span> -</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> alias (str)</span> -</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a><span class="sd"> """</span> -</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="c1"># Collect all columns that reference the alias of the inner query</span> -</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="n">outer_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> -</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> -</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">:</span> -</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> <span class="n">outer_columns</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> -</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> -</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="c1"># Replace columns with the projection expression in the inner query</span> -</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="n">projection_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">projection_name</span><span class="p">:</span> -</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="k">continue</span> -</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="n">columns_to_replace</span> <span class="o">=</span> <span class="n">outer_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">projection_name</span><span class="p">,</span> <span class="p">[])</span> -</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_to_replace</span><span class="p">:</span> -</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">unalias</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="k">def</span> <span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">):</span> +</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="sd"> Merge projections of inner query into outer query.</span> +</span><span id="L-281"><a href="#L-281"><span class="linenos">281</span></a> +</span><span id="L-282"><a href="#L-282"><span class="linenos">282</span></a><span class="sd"> Args:</span> +</span><span id="L-283"><a href="#L-283"><span class="linenos">283</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-284"><a href="#L-284"><span class="linenos">284</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-285"><a href="#L-285"><span class="linenos">285</span></a><span class="sd"> alias (str)</span> +</span><span id="L-286"><a href="#L-286"><span class="linenos">286</span></a><span class="sd"> """</span> +</span><span id="L-287"><a href="#L-287"><span class="linenos">287</span></a> <span class="c1"># Collect all columns that reference the alias of the inner query</span> +</span><span id="L-288"><a href="#L-288"><span class="linenos">288</span></a> <span class="n">outer_columns</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> +</span><span id="L-289"><a href="#L-289"><span class="linenos">289</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span> +</span><span id="L-290"><a href="#L-290"><span class="linenos">290</span></a> <span class="k">if</span> <span class="n">column</span><span class="o">.</span><span class="n">table</span> <span class="o">==</span> <span class="n">alias</span><span class="p">:</span> +</span><span id="L-291"><a href="#L-291"><span class="linenos">291</span></a> <span class="n">outer_columns</span><span class="p">[</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">column</span><span class="p">)</span> +</span><span id="L-292"><a href="#L-292"><span class="linenos">292</span></a> +</span><span id="L-293"><a href="#L-293"><span class="linenos">293</span></a> <span class="c1"># Replace columns with the projection expression in the inner query</span> +</span><span id="L-294"><a href="#L-294"><span class="linenos">294</span></a> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-295"><a href="#L-295"><span class="linenos">295</span></a> <span class="n">projection_name</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-296"><a href="#L-296"><span class="linenos">296</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">projection_name</span><span class="p">:</span> +</span><span id="L-297"><a href="#L-297"><span class="linenos">297</span></a> <span class="k">continue</span> +</span><span id="L-298"><a href="#L-298"><span class="linenos">298</span></a> <span class="n">columns_to_replace</span> <span class="o">=</span> <span class="n">outer_columns</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">projection_name</span><span class="p">,</span> <span class="p">[])</span> +</span><span id="L-299"><a href="#L-299"><span class="linenos">299</span></a> <span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">columns_to_replace</span><span class="p">:</span> +</span><span id="L-300"><a href="#L-300"><span class="linenos">300</span></a> <span class="n">column</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">unalias</span><span class="p">()</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span> +</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a> </span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a> -</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a> -</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a><span class="k">def</span> <span class="nf">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a><span class="sd"> Merge WHERE clause of inner query into outer query.</span> -</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a> -</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a><span class="sd"> Args:</span> -</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> -</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a><span class="sd"> """</span> -</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> -</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> -</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> <span class="k">return</span> -</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> -</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span> -</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> -</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> -</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="c1"># Merge predicates from an outer join to the ON clause</span> -</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="c1"># if it only has columns that are already joined</span> -</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> -</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">}</span> <span class="k">if</span> <span class="n">from_</span> <span class="k">else</span> <span class="p">{}</span> -</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> -</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]:</span> -</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="n">sources</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">source</span><span class="p">)</span> -</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">if</span> <span class="n">source</span> <span class="o">==</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> -</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> <span class="k">break</span> -</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> -</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="k">if</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">))</span> <span class="o"><=</span> <span class="n">sources</span><span class="p">:</span> -</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">simplify</span><span class="p">(</span><span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">)))</span> -</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> <span class="k">return</span> -</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> -</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> -</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="n">simplify</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)))</span> +</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a><span class="k">def</span> <span class="nf">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a><span class="sd"> Merge WHERE clause of inner query into outer query.</span> +</span><span id="L-306"><a href="#L-306"><span class="linenos">306</span></a> +</span><span id="L-307"><a href="#L-307"><span class="linenos">307</span></a><span class="sd"> Args:</span> +</span><span id="L-308"><a href="#L-308"><span class="linenos">308</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-309"><a href="#L-309"><span class="linenos">309</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-310"><a href="#L-310"><span class="linenos">310</span></a><span class="sd"> from_or_join (exp.From|exp.Join)</span> +</span><span id="L-311"><a href="#L-311"><span class="linenos">311</span></a><span class="sd"> """</span> +</span><span id="L-312"><a href="#L-312"><span class="linenos">312</span></a> <span class="n">where</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">)</span> +</span><span id="L-313"><a href="#L-313"><span class="linenos">313</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">where</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">:</span> +</span><span id="L-314"><a href="#L-314"><span class="linenos">314</span></a> <span class="k">return</span> +</span><span id="L-315"><a href="#L-315"><span class="linenos">315</span></a> +</span><span id="L-316"><a href="#L-316"><span class="linenos">316</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span> +</span><span id="L-317"><a href="#L-317"><span class="linenos">317</span></a> +</span><span id="L-318"><a href="#L-318"><span class="linenos">318</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">from_or_join</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">):</span> +</span><span id="L-319"><a href="#L-319"><span class="linenos">319</span></a> <span class="c1"># Merge predicates from an outer join to the ON clause</span> +</span><span id="L-320"><a href="#L-320"><span class="linenos">320</span></a> <span class="c1"># if it only has columns that are already joined</span> +</span><span id="L-321"><a href="#L-321"><span class="linenos">321</span></a> <span class="n">from_</span> <span class="o">=</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"from"</span><span class="p">)</span> +</span><span id="L-322"><a href="#L-322"><span class="linenos">322</span></a> <span class="n">sources</span> <span class="o">=</span> <span class="p">{</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> <span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">from_</span><span class="o">.</span><span class="n">expressions</span><span class="p">}</span> <span class="k">if</span> <span class="n">from_</span> <span class="k">else</span> <span class="p">{}</span> +</span><span id="L-323"><a href="#L-323"><span class="linenos">323</span></a> +</span><span id="L-324"><a href="#L-324"><span class="linenos">324</span></a> <span class="k">for</span> <span class="n">join</span> <span class="ow">in</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="s2">"joins"</span><span class="p">]:</span> +</span><span id="L-325"><a href="#L-325"><span class="linenos">325</span></a> <span class="n">source</span> <span class="o">=</span> <span class="n">join</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-326"><a href="#L-326"><span class="linenos">326</span></a> <span class="n">sources</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">source</span><span class="p">)</span> +</span><span id="L-327"><a href="#L-327"><span class="linenos">327</span></a> <span class="k">if</span> <span class="n">source</span> <span class="o">==</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">:</span> +</span><span id="L-328"><a href="#L-328"><span class="linenos">328</span></a> <span class="k">break</span> +</span><span id="L-329"><a href="#L-329"><span class="linenos">329</span></a> +</span><span id="L-330"><a href="#L-330"><span class="linenos">330</span></a> <span class="k">if</span> <span class="nb">set</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column_table_names</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">))</span> <span class="o"><=</span> <span class="n">sources</span><span class="p">:</span> +</span><span id="L-331"><a href="#L-331"><span class="linenos">331</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">on</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-332"><a href="#L-332"><span class="linenos">332</span></a> <span class="n">from_or_join</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"on"</span><span class="p">,</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"on"</span><span class="p">))</span> +</span><span id="L-333"><a href="#L-333"><span class="linenos">333</span></a> <span class="k">return</span> +</span><span id="L-334"><a href="#L-334"><span class="linenos">334</span></a> +</span><span id="L-335"><a href="#L-335"><span class="linenos">335</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">where</span><span class="p">(</span><span class="n">where</span><span class="o">.</span><span class="n">this</span><span class="p">,</span> <span class="n">copy</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> +</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"where"</span><span class="p">,</span> <span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"where"</span><span class="p">))</span> +</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a> </span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a> -</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a> -</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a><span class="k">def</span> <span class="nf">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a><span class="sd"> Merge ORDER clause of inner query into outer query.</span> -</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a> -</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="sd"> Args:</span> -</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a><span class="sd"> """</span> -</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="k">if</span> <span class="p">(</span> -</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="nb">any</span><span class="p">(</span> -</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"group"</span><span class="p">,</span> <span class="s2">"distinct"</span><span class="p">,</span> <span class="s2">"having"</span><span class="p">,</span> <span class="s2">"order"</span><span class="p">]</span> -</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="p">)</span> -</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span> -</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="ow">or</span> <span class="nb">any</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> -</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="p">):</span> -</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> <span class="k">return</span> -</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> -</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">))</span> +</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a><span class="k">def</span> <span class="nf">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-340"><a href="#L-340"><span class="linenos">340</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-341"><a href="#L-341"><span class="linenos">341</span></a><span class="sd"> Merge ORDER clause of inner query into outer query.</span> +</span><span id="L-342"><a href="#L-342"><span class="linenos">342</span></a> +</span><span id="L-343"><a href="#L-343"><span class="linenos">343</span></a><span class="sd"> Args:</span> +</span><span id="L-344"><a href="#L-344"><span class="linenos">344</span></a><span class="sd"> outer_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-345"><a href="#L-345"><span class="linenos">345</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-346"><a href="#L-346"><span class="linenos">346</span></a><span class="sd"> """</span> +</span><span id="L-347"><a href="#L-347"><span class="linenos">347</span></a> <span class="k">if</span> <span class="p">(</span> +</span><span id="L-348"><a href="#L-348"><span class="linenos">348</span></a> <span class="nb">any</span><span class="p">(</span> +</span><span id="L-349"><a href="#L-349"><span class="linenos">349</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span> <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"group"</span><span class="p">,</span> <span class="s2">"distinct"</span><span class="p">,</span> <span class="s2">"having"</span><span class="p">,</span> <span class="s2">"order"</span><span class="p">]</span> +</span><span id="L-350"><a href="#L-350"><span class="linenos">350</span></a> <span class="p">)</span> +</span><span id="L-351"><a href="#L-351"><span class="linenos">351</span></a> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">1</span> +</span><span id="L-352"><a href="#L-352"><span class="linenos">352</span></a> <span class="ow">or</span> <span class="nb">any</span><span class="p">(</span><span class="n">expression</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">AggFunc</span><span class="p">)</span> <span class="k">for</span> <span class="n">expression</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> +</span><span id="L-353"><a href="#L-353"><span class="linenos">353</span></a> <span class="p">):</span> +</span><span id="L-354"><a href="#L-354"><span class="linenos">354</span></a> <span class="k">return</span> +</span><span id="L-355"><a href="#L-355"><span class="linenos">355</span></a> +</span><span id="L-356"><a href="#L-356"><span class="linenos">356</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"order"</span><span class="p">,</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"order"</span><span class="p">))</span> +</span><span id="L-357"><a href="#L-357"><span class="linenos">357</span></a> </span><span id="L-358"><a href="#L-358"><span class="linenos">358</span></a> -</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a> -</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a><span class="k">def</span> <span class="nf">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="n">inner_scope_hint</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> -</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_scope_hint</span><span class="p">:</span> -</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="k">return</span> -</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="n">outer_scope_hint</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> -</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">if</span> <span class="n">outer_scope_hint</span><span class="p">:</span> -</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="k">for</span> <span class="n">hint_expression</span> <span class="ow">in</span> <span class="n">inner_scope_hint</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="n">outer_scope_hint</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">hint_expression</span><span class="p">)</span> -</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">,</span> <span class="n">inner_scope_hint</span><span class="p">)</span> +</span><span id="L-359"><a href="#L-359"><span class="linenos">359</span></a><span class="k">def</span> <span class="nf">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-360"><a href="#L-360"><span class="linenos">360</span></a> <span class="n">inner_scope_hint</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> +</span><span id="L-361"><a href="#L-361"><span class="linenos">361</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">inner_scope_hint</span><span class="p">:</span> +</span><span id="L-362"><a href="#L-362"><span class="linenos">362</span></a> <span class="k">return</span> +</span><span id="L-363"><a href="#L-363"><span class="linenos">363</span></a> <span class="n">outer_scope_hint</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">)</span> +</span><span id="L-364"><a href="#L-364"><span class="linenos">364</span></a> <span class="k">if</span> <span class="n">outer_scope_hint</span><span class="p">:</span> +</span><span id="L-365"><a href="#L-365"><span class="linenos">365</span></a> <span class="k">for</span> <span class="n">hint_expression</span> <span class="ow">in</span> <span class="n">inner_scope_hint</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-366"><a href="#L-366"><span class="linenos">366</span></a> <span class="n">outer_scope_hint</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s2">"expressions"</span><span class="p">,</span> <span class="n">hint_expression</span><span class="p">)</span> +</span><span id="L-367"><a href="#L-367"><span class="linenos">367</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-368"><a href="#L-368"><span class="linenos">368</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"hint"</span><span class="p">,</span> <span class="n">inner_scope_hint</span><span class="p">)</span> +</span><span id="L-369"><a href="#L-369"><span class="linenos">369</span></a> </span><span id="L-370"><a href="#L-370"><span class="linenos">370</span></a> -</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a> -</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="k">def</span> <span class="nf">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">):</span> -</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a><span class="sd"> Remove CTE from the AST.</span> -</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a> -</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> Args:</span> -</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> -</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a><span class="sd"> """</span> -</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> -</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-384"><a href="#L-384"><span class="linenos">384</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-371"><a href="#L-371"><span class="linenos">371</span></a><span class="k">def</span> <span class="nf">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">):</span> +</span><span id="L-372"><a href="#L-372"><span class="linenos">372</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-373"><a href="#L-373"><span class="linenos">373</span></a><span class="sd"> Remove CTE from the AST.</span> +</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a> +</span><span id="L-375"><a href="#L-375"><span class="linenos">375</span></a><span class="sd"> Args:</span> +</span><span id="L-376"><a href="#L-376"><span class="linenos">376</span></a><span class="sd"> inner_scope (sqlglot.optimizer.scope.Scope)</span> +</span><span id="L-377"><a href="#L-377"><span class="linenos">377</span></a><span class="sd"> """</span> +</span><span id="L-378"><a href="#L-378"><span class="linenos">378</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-379"><a href="#L-379"><span class="linenos">379</span></a> <span class="n">with_</span> <span class="o">=</span> <span class="n">cte</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-380"><a href="#L-380"><span class="linenos">380</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> +</span><span id="L-381"><a href="#L-381"><span class="linenos">381</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-382"><a href="#L-382"><span class="linenos">382</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-383"><a href="#L-383"><span class="linenos">383</span></a> <span class="n">cte</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> </span></pre></div> @@ -461,35 +460,35 @@ </div> <a class="headerlink" href="#merge_subqueries"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="merge_subqueries-10"><a href="#merge_subqueries-10"><span class="linenos">10</span></a><span class="k">def</span> <span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="merge_subqueries-11"><a href="#merge_subqueries-11"><span class="linenos">11</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="merge_subqueries-12"><a href="#merge_subqueries-12"><span class="linenos">12</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</span> -</span><span id="merge_subqueries-13"><a href="#merge_subqueries-13"><span class="linenos">13</span></a> -</span><span id="merge_subqueries-14"><a href="#merge_subqueries-14"><span class="linenos">14</span></a><span class="sd"> This also merges CTEs if they are selected from only once.</span> -</span><span id="merge_subqueries-15"><a href="#merge_subqueries-15"><span class="linenos">15</span></a> -</span><span id="merge_subqueries-16"><a href="#merge_subqueries-16"><span class="linenos">16</span></a><span class="sd"> Example:</span> -</span><span id="merge_subqueries-17"><a href="#merge_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> import sqlglot</span> -</span><span id="merge_subqueries-18"><a href="#merge_subqueries-18"><span class="linenos">18</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> -</span><span id="merge_subqueries-19"><a href="#merge_subqueries-19"><span class="linenos">19</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> -</span><span id="merge_subqueries-20"><a href="#merge_subqueries-20"><span class="linenos">20</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> -</span><span id="merge_subqueries-21"><a href="#merge_subqueries-21"><span class="linenos">21</span></a> -</span><span id="merge_subqueries-22"><a href="#merge_subqueries-22"><span class="linenos">22</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> -</span><span id="merge_subqueries-23"><a href="#merge_subqueries-23"><span class="linenos">23</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> -</span><span id="merge_subqueries-24"><a href="#merge_subqueries-24"><span class="linenos">24</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> -</span><span id="merge_subqueries-25"><a href="#merge_subqueries-25"><span class="linenos">25</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> -</span><span id="merge_subqueries-26"><a href="#merge_subqueries-26"><span class="linenos">26</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</span> -</span><span id="merge_subqueries-27"><a href="#merge_subqueries-27"><span class="linenos">27</span></a> -</span><span id="merge_subqueries-28"><a href="#merge_subqueries-28"><span class="linenos">28</span></a><span class="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> -</span><span id="merge_subqueries-29"><a href="#merge_subqueries-29"><span class="linenos">29</span></a> -</span><span id="merge_subqueries-30"><a href="#merge_subqueries-30"><span class="linenos">30</span></a><span class="sd"> Args:</span> -</span><span id="merge_subqueries-31"><a href="#merge_subqueries-31"><span class="linenos">31</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span> -</span><span id="merge_subqueries-32"><a href="#merge_subqueries-32"><span class="linenos">32</span></a><span class="sd"> leave_tables_isolated (bool):</span> -</span><span id="merge_subqueries-33"><a href="#merge_subqueries-33"><span class="linenos">33</span></a><span class="sd"> Returns:</span> -</span><span id="merge_subqueries-34"><a href="#merge_subqueries-34"><span class="linenos">34</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> -</span><span id="merge_subqueries-35"><a href="#merge_subqueries-35"><span class="linenos">35</span></a><span class="sd"> """</span> -</span><span id="merge_subqueries-36"><a href="#merge_subqueries-36"><span class="linenos">36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> -</span><span id="merge_subqueries-37"><a href="#merge_subqueries-37"><span class="linenos">37</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> -</span><span id="merge_subqueries-38"><a href="#merge_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="merge_subqueries-9"><a href="#merge_subqueries-9"><span class="linenos"> 9</span></a><span class="k">def</span> <span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="merge_subqueries-10"><a href="#merge_subqueries-10"><span class="linenos">10</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="merge_subqueries-11"><a href="#merge_subqueries-11"><span class="linenos">11</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</span> +</span><span id="merge_subqueries-12"><a href="#merge_subqueries-12"><span class="linenos">12</span></a> +</span><span id="merge_subqueries-13"><a href="#merge_subqueries-13"><span class="linenos">13</span></a><span class="sd"> This also merges CTEs if they are selected from only once.</span> +</span><span id="merge_subqueries-14"><a href="#merge_subqueries-14"><span class="linenos">14</span></a> +</span><span id="merge_subqueries-15"><a href="#merge_subqueries-15"><span class="linenos">15</span></a><span class="sd"> Example:</span> +</span><span id="merge_subqueries-16"><a href="#merge_subqueries-16"><span class="linenos">16</span></a><span class="sd"> >>> import sqlglot</span> +</span><span id="merge_subqueries-17"><a href="#merge_subqueries-17"><span class="linenos">17</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="merge_subqueries-18"><a href="#merge_subqueries-18"><span class="linenos">18</span></a><span class="sd"> >>> merge_subqueries(expression).sql()</span> +</span><span id="merge_subqueries-19"><a href="#merge_subqueries-19"><span class="linenos">19</span></a><span class="sd"> 'SELECT x.a FROM x JOIN y'</span> +</span><span id="merge_subqueries-20"><a href="#merge_subqueries-20"><span class="linenos">20</span></a> +</span><span id="merge_subqueries-21"><a href="#merge_subqueries-21"><span class="linenos">21</span></a><span class="sd"> If `leave_tables_isolated` is True, this will not merge inner queries into outer</span> +</span><span id="merge_subqueries-22"><a href="#merge_subqueries-22"><span class="linenos">22</span></a><span class="sd"> queries if it would result in multiple table selects in a single query:</span> +</span><span id="merge_subqueries-23"><a href="#merge_subqueries-23"><span class="linenos">23</span></a><span class="sd"> >>> expression = sqlglot.parse_one("SELECT a FROM (SELECT x.a FROM x) JOIN y")</span> +</span><span id="merge_subqueries-24"><a href="#merge_subqueries-24"><span class="linenos">24</span></a><span class="sd"> >>> merge_subqueries(expression, leave_tables_isolated=True).sql()</span> +</span><span id="merge_subqueries-25"><a href="#merge_subqueries-25"><span class="linenos">25</span></a><span class="sd"> 'SELECT a FROM (SELECT x.a FROM x) JOIN y'</span> +</span><span id="merge_subqueries-26"><a href="#merge_subqueries-26"><span class="linenos">26</span></a> +</span><span id="merge_subqueries-27"><a href="#merge_subqueries-27"><span class="linenos">27</span></a><span class="sd"> Inspired by https://dev.mysql.com/doc/refman/8.0/en/derived-table-optimization.html</span> +</span><span id="merge_subqueries-28"><a href="#merge_subqueries-28"><span class="linenos">28</span></a> +</span><span id="merge_subqueries-29"><a href="#merge_subqueries-29"><span class="linenos">29</span></a><span class="sd"> Args:</span> +</span><span id="merge_subqueries-30"><a href="#merge_subqueries-30"><span class="linenos">30</span></a><span class="sd"> expression (sqlglot.Expression): expression to optimize</span> +</span><span id="merge_subqueries-31"><a href="#merge_subqueries-31"><span class="linenos">31</span></a><span class="sd"> leave_tables_isolated (bool):</span> +</span><span id="merge_subqueries-32"><a href="#merge_subqueries-32"><span class="linenos">32</span></a><span class="sd"> Returns:</span> +</span><span id="merge_subqueries-33"><a href="#merge_subqueries-33"><span class="linenos">33</span></a><span class="sd"> sqlglot.Expression: optimized expression</span> +</span><span id="merge_subqueries-34"><a href="#merge_subqueries-34"><span class="linenos">34</span></a><span class="sd"> """</span> +</span><span id="merge_subqueries-35"><a href="#merge_subqueries-35"><span class="linenos">35</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> +</span><span id="merge_subqueries-36"><a href="#merge_subqueries-36"><span class="linenos">36</span></a> <span class="n">expression</span> <span class="o">=</span> <span class="n">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">)</span> +</span><span id="merge_subqueries-37"><a href="#merge_subqueries-37"><span class="linenos">37</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -551,38 +550,38 @@ queries if it would result in multiple table selects in a single query:</p> </div> <a class="headerlink" href="#merge_ctes"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="merge_ctes-52"><a href="#merge_ctes-52"><span class="linenos">52</span></a><span class="k">def</span> <span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="merge_ctes-53"><a href="#merge_ctes-53"><span class="linenos">53</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> -</span><span id="merge_ctes-54"><a href="#merge_ctes-54"><span class="linenos">54</span></a> -</span><span id="merge_ctes-55"><a href="#merge_ctes-55"><span class="linenos">55</span></a> <span class="c1"># All places where we select from CTEs.</span> -</span><span id="merge_ctes-56"><a href="#merge_ctes-56"><span class="linenos">56</span></a> <span class="c1"># We key on the CTE scope so we can detect CTES that are selected from multiple times.</span> -</span><span id="merge_ctes-57"><a href="#merge_ctes-57"><span class="linenos">57</span></a> <span class="n">cte_selections</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> -</span><span id="merge_ctes-58"><a href="#merge_ctes-58"><span class="linenos">58</span></a> <span class="k">for</span> <span class="n">outer_scope</span> <span class="ow">in</span> <span class="n">scopes</span><span class="p">:</span> -</span><span id="merge_ctes-59"><a href="#merge_ctes-59"><span class="linenos">59</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">inner_scope</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="merge_ctes-60"><a href="#merge_ctes-60"><span class="linenos">60</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="merge_ctes-61"><a href="#merge_ctes-61"><span class="linenos">61</span></a> <span class="n">cte_selections</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> -</span><span id="merge_ctes-62"><a href="#merge_ctes-62"><span class="linenos">62</span></a> <span class="p">(</span> -</span><span id="merge_ctes-63"><a href="#merge_ctes-63"><span class="linenos">63</span></a> <span class="n">outer_scope</span><span class="p">,</span> -</span><span id="merge_ctes-64"><a href="#merge_ctes-64"><span class="linenos">64</span></a> <span class="n">inner_scope</span><span class="p">,</span> -</span><span id="merge_ctes-65"><a href="#merge_ctes-65"><span class="linenos">65</span></a> <span class="n">table</span><span class="p">,</span> -</span><span id="merge_ctes-66"><a href="#merge_ctes-66"><span class="linenos">66</span></a> <span class="p">)</span> -</span><span id="merge_ctes-67"><a href="#merge_ctes-67"><span class="linenos">67</span></a> <span class="p">)</span> -</span><span id="merge_ctes-68"><a href="#merge_ctes-68"><span class="linenos">68</span></a> -</span><span id="merge_ctes-69"><a href="#merge_ctes-69"><span class="linenos">69</span></a> <span class="n">singular_cte_selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</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="n">cte_selections</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">]</span> -</span><span id="merge_ctes-70"><a href="#merge_ctes-70"><span class="linenos">70</span></a> <span class="k">for</span> <span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">singular_cte_selections</span><span class="p">:</span> -</span><span id="merge_ctes-71"><a href="#merge_ctes-71"><span class="linenos">71</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">table</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="merge_ctes-72"><a href="#merge_ctes-72"><span class="linenos">72</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="merge_ctes-73"><a href="#merge_ctes-73"><span class="linenos">73</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="merge_ctes-74"><a href="#merge_ctes-74"><span class="linenos">74</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_ctes-75"><a href="#merge_ctes-75"><span class="linenos">75</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_ctes-76"><a href="#merge_ctes-76"><span class="linenos">76</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_ctes-77"><a href="#merge_ctes-77"><span class="linenos">77</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="merge_ctes-78"><a href="#merge_ctes-78"><span class="linenos">78</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="merge_ctes-79"><a href="#merge_ctes-79"><span class="linenos">79</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="merge_ctes-80"><a href="#merge_ctes-80"><span class="linenos">80</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="merge_ctes-81"><a href="#merge_ctes-81"><span class="linenos">81</span></a> <span class="n">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)</span> -</span><span id="merge_ctes-82"><a href="#merge_ctes-82"><span class="linenos">82</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="merge_ctes-83"><a href="#merge_ctes-83"><span class="linenos">83</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="merge_ctes-51"><a href="#merge_ctes-51"><span class="linenos">51</span></a><span class="k">def</span> <span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="merge_ctes-52"><a href="#merge_ctes-52"><span class="linenos">52</span></a> <span class="n">scopes</span> <span class="o">=</span> <span class="n">traverse_scope</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span> +</span><span id="merge_ctes-53"><a href="#merge_ctes-53"><span class="linenos">53</span></a> +</span><span id="merge_ctes-54"><a href="#merge_ctes-54"><span class="linenos">54</span></a> <span class="c1"># All places where we select from CTEs.</span> +</span><span id="merge_ctes-55"><a href="#merge_ctes-55"><span class="linenos">55</span></a> <span class="c1"># We key on the CTE scope so we can detect CTES that are selected from multiple times.</span> +</span><span id="merge_ctes-56"><a href="#merge_ctes-56"><span class="linenos">56</span></a> <span class="n">cte_selections</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">list</span><span class="p">)</span> +</span><span id="merge_ctes-57"><a href="#merge_ctes-57"><span class="linenos">57</span></a> <span class="k">for</span> <span class="n">outer_scope</span> <span class="ow">in</span> <span class="n">scopes</span><span class="p">:</span> +</span><span id="merge_ctes-58"><a href="#merge_ctes-58"><span class="linenos">58</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">inner_scope</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="merge_ctes-59"><a href="#merge_ctes-59"><span class="linenos">59</span></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">,</span> <span class="n">Scope</span><span class="p">)</span> <span class="ow">and</span> <span class="n">inner_scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="merge_ctes-60"><a href="#merge_ctes-60"><span class="linenos">60</span></a> <span class="n">cte_selections</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> +</span><span id="merge_ctes-61"><a href="#merge_ctes-61"><span class="linenos">61</span></a> <span class="p">(</span> +</span><span id="merge_ctes-62"><a href="#merge_ctes-62"><span class="linenos">62</span></a> <span class="n">outer_scope</span><span class="p">,</span> +</span><span id="merge_ctes-63"><a href="#merge_ctes-63"><span class="linenos">63</span></a> <span class="n">inner_scope</span><span class="p">,</span> +</span><span id="merge_ctes-64"><a href="#merge_ctes-64"><span class="linenos">64</span></a> <span class="n">table</span><span class="p">,</span> +</span><span id="merge_ctes-65"><a href="#merge_ctes-65"><span class="linenos">65</span></a> <span class="p">)</span> +</span><span id="merge_ctes-66"><a href="#merge_ctes-66"><span class="linenos">66</span></a> <span class="p">)</span> +</span><span id="merge_ctes-67"><a href="#merge_ctes-67"><span class="linenos">67</span></a> +</span><span id="merge_ctes-68"><a href="#merge_ctes-68"><span class="linenos">68</span></a> <span class="n">singular_cte_selections</span> <span class="o">=</span> <span class="p">[</span><span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</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="n">cte_selections</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">]</span> +</span><span id="merge_ctes-69"><a href="#merge_ctes-69"><span class="linenos">69</span></a> <span class="k">for</span> <span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">singular_cte_selections</span><span class="p">:</span> +</span><span id="merge_ctes-70"><a href="#merge_ctes-70"><span class="linenos">70</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">table</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="merge_ctes-71"><a href="#merge_ctes-71"><span class="linenos">71</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="merge_ctes-72"><a href="#merge_ctes-72"><span class="linenos">72</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="merge_ctes-73"><a href="#merge_ctes-73"><span class="linenos">73</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_ctes-74"><a href="#merge_ctes-74"><span class="linenos">74</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_ctes-75"><a href="#merge_ctes-75"><span class="linenos">75</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_ctes-76"><a href="#merge_ctes-76"><span class="linenos">76</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="merge_ctes-77"><a href="#merge_ctes-77"><span class="linenos">77</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="merge_ctes-78"><a href="#merge_ctes-78"><span class="linenos">78</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="merge_ctes-79"><a href="#merge_ctes-79"><span class="linenos">79</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="merge_ctes-80"><a href="#merge_ctes-80"><span class="linenos">80</span></a> <span class="n">_pop_cte</span><span class="p">(</span><span class="n">inner_scope</span><span class="p">)</span> +</span><span id="merge_ctes-81"><a href="#merge_ctes-81"><span class="linenos">81</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="merge_ctes-82"><a href="#merge_ctes-82"><span class="linenos">82</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> @@ -600,22 +599,22 @@ queries if it would result in multiple table selects in a single query:</p> </div> <a class="headerlink" href="#merge_derived_tables"></a> - <div class="pdoc-code codehilite"><pre><span></span><span id="merge_derived_tables-86"><a href="#merge_derived_tables-86"><span class="linenos"> 86</span></a><span class="k">def</span> <span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> -</span><span id="merge_derived_tables-87"><a href="#merge_derived_tables-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">outer_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="merge_derived_tables-88"><a href="#merge_derived_tables-88"><span class="linenos"> 88</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span> -</span><span id="merge_derived_tables-89"><a href="#merge_derived_tables-89"><span class="linenos"> 89</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">subquery</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> -</span><span id="merge_derived_tables-90"><a href="#merge_derived_tables-90"><span class="linenos"> 90</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="merge_derived_tables-91"><a href="#merge_derived_tables-91"><span class="linenos"> 91</span></a> <span class="n">inner_scope</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> -</span><span id="merge_derived_tables-92"><a href="#merge_derived_tables-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> -</span><span id="merge_derived_tables-93"><a href="#merge_derived_tables-93"><span class="linenos"> 93</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_derived_tables-94"><a href="#merge_derived_tables-94"><span class="linenos"> 94</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">subquery</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_derived_tables-95"><a href="#merge_derived_tables-95"><span class="linenos"> 95</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> -</span><span id="merge_derived_tables-96"><a href="#merge_derived_tables-96"><span class="linenos"> 96</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="merge_derived_tables-97"><a href="#merge_derived_tables-97"><span class="linenos"> 97</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> -</span><span id="merge_derived_tables-98"><a href="#merge_derived_tables-98"><span class="linenos"> 98</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="merge_derived_tables-99"><a href="#merge_derived_tables-99"><span class="linenos"> 99</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> -</span><span id="merge_derived_tables-100"><a href="#merge_derived_tables-100"><span class="linenos">100</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> -</span><span id="merge_derived_tables-101"><a href="#merge_derived_tables-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">expression</span> + <div class="pdoc-code codehilite"><pre><span></span><span id="merge_derived_tables-85"><a href="#merge_derived_tables-85"><span class="linenos"> 85</span></a><span class="k">def</span> <span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> +</span><span id="merge_derived_tables-86"><a href="#merge_derived_tables-86"><span class="linenos"> 86</span></a> <span class="k">for</span> <span class="n">outer_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="merge_derived_tables-87"><a href="#merge_derived_tables-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">subquery</span> <span class="ow">in</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">derived_tables</span><span class="p">:</span> +</span><span id="merge_derived_tables-88"><a href="#merge_derived_tables-88"><span class="linenos"> 88</span></a> <span class="n">from_or_join</span> <span class="o">=</span> <span class="n">subquery</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">From</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Join</span><span class="p">)</span> +</span><span id="merge_derived_tables-89"><a href="#merge_derived_tables-89"><span class="linenos"> 89</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">subquery</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="merge_derived_tables-90"><a href="#merge_derived_tables-90"><span class="linenos"> 90</span></a> <span class="n">inner_scope</span> <span class="o">=</span> <span class="n">outer_scope</span><span class="o">.</span><span class="n">sources</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> +</span><span id="merge_derived_tables-91"><a href="#merge_derived_tables-91"><span class="linenos"> 91</span></a> <span class="k">if</span> <span class="n">_mergeable</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">):</span> +</span><span id="merge_derived_tables-92"><a href="#merge_derived_tables-92"><span class="linenos"> 92</span></a> <span class="n">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_derived_tables-93"><a href="#merge_derived_tables-93"><span class="linenos"> 93</span></a> <span class="n">_merge_from</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">subquery</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_derived_tables-94"><a href="#merge_derived_tables-94"><span class="linenos"> 94</span></a> <span class="n">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">alias</span><span class="p">)</span> +</span><span id="merge_derived_tables-95"><a href="#merge_derived_tables-95"><span class="linenos"> 95</span></a> <span class="n">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="merge_derived_tables-96"><a href="#merge_derived_tables-96"><span class="linenos"> 96</span></a> <span class="n">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">)</span> +</span><span id="merge_derived_tables-97"><a href="#merge_derived_tables-97"><span class="linenos"> 97</span></a> <span class="n">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="merge_derived_tables-98"><a href="#merge_derived_tables-98"><span class="linenos"> 98</span></a> <span class="n">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">,</span> <span class="n">inner_scope</span><span class="p">)</span> +</span><span id="merge_derived_tables-99"><a href="#merge_derived_tables-99"><span class="linenos"> 99</span></a> <span class="n">outer_scope</span><span class="o">.</span><span class="n">clear_cache</span><span class="p">()</span> +</span><span id="merge_derived_tables-100"><a href="#merge_derived_tables-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> |