Merging upstream version 26.1.3.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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119 changed files with 71635 additions and 68059 deletions
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<title>sqlglot.optimizer.merge_subqueries API documentation</title>
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<label class="view-source-button" for="mod-merge_subqueries-view-source"><span>View Source</span></label>
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<div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span>
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<div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">__future__</span><span class="w"> </span><span class="kn">import</span> <span class="n">annotations</span>
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</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a>
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</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span> <span class="nn">typing</span> <span class="k">as</span> <span class="nn">t</span>
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</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a><span class="kn">import</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">t</span>
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</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a>
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</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span>
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</span><span id="L-5"><a href="#L-5"><span class="linenos"> 5</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">collections</span><span class="w"> </span><span class="kn">import</span> <span class="n">defaultdict</span>
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</span><span id="L-6"><a href="#L-6"><span class="linenos"> 6</span></a>
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</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span> <span class="nn">sqlglot</span> <span class="kn">import</span> <span class="n">expressions</span> <span class="k">as</span> <span class="n">exp</span>
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</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span> <span class="nn">sqlglot.helper</span> <span class="kn">import</span> <span class="n">find_new_name</span>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span> <span class="nn">sqlglot.optimizer.scope</span> <span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span>
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</span><span id="L-7"><a href="#L-7"><span class="linenos"> 7</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot</span><span class="w"> </span><span class="kn">import</span> <span class="n">expressions</span> <span class="k">as</span> <span class="n">exp</span>
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</span><span id="L-8"><a href="#L-8"><span class="linenos"> 8</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.helper</span><span class="w"> </span><span class="kn">import</span> <span class="n">find_new_name</span>
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</span><span id="L-9"><a href="#L-9"><span class="linenos"> 9</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot.optimizer.scope</span><span class="w"> </span><span class="kn">import</span> <span class="n">Scope</span><span class="p">,</span> <span class="n">traverse_scope</span>
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</span><span id="L-10"><a href="#L-10"><span class="linenos"> 10</span></a>
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</span><span id="L-11"><a href="#L-11"><span class="linenos"> 11</span></a><span class="k">if</span> <span class="n">t</span><span class="o">.</span><span class="n">TYPE_CHECKING</span><span class="p">:</span>
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</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="kn">from</span> <span class="nn">sqlglot._typing</span> <span class="kn">import</span> <span class="n">E</span>
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</span><span id="L-12"><a href="#L-12"><span class="linenos"> 12</span></a> <span class="kn">from</span><span class="w"> </span><span class="nn">sqlglot._typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">E</span>
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</span><span id="L-13"><a href="#L-13"><span class="linenos"> 13</span></a>
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</span><span id="L-14"><a href="#L-14"><span class="linenos"> 14</span></a> <span class="n">FromOrJoin</span> <span class="o">=</span> <span class="n">t</span><span class="o">.</span><span class="n">Union</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>
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</span><span id="L-15"><a href="#L-15"><span class="linenos"> 15</span></a>
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</span><span id="L-16"><a href="#L-16"><span class="linenos"> 16</span></a>
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</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-17"><a href="#L-17"><span class="linenos"> 17</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-18"><a href="#L-18"><span class="linenos"> 18</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-19"><a href="#L-19"><span class="linenos"> 19</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</span>
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</span><span id="L-20"><a href="#L-20"><span class="linenos"> 20</span></a>
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@ -137,7 +137,7 @@
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</span><span id="L-67"><a href="#L-67"><span class="linenos"> 67</span></a><span class="p">)</span>
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</span><span id="L-68"><a href="#L-68"><span class="linenos"> 68</span></a>
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</span><span id="L-69"><a href="#L-69"><span class="linenos"> 69</span></a>
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</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-70"><a href="#L-70"><span class="linenos"> 70</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-71"><a href="#L-71"><span class="linenos"> 71</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>
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</span><span id="L-72"><a href="#L-72"><span class="linenos"> 72</span></a>
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</span><span id="L-73"><a href="#L-73"><span class="linenos"> 73</span></a> <span class="c1"># All places where we select from CTEs.</span>
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@ -171,7 +171,7 @@
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</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a>
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</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a>
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</span><span id="L-104"><a href="#L-104"><span class="linenos">104</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
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</span><span id="L-105"><a href="#L-105"><span class="linenos">105</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>
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</span><span id="L-106"><a href="#L-106"><span class="linenos">106</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>
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</span><span id="L-107"><a href="#L-107"><span class="linenos">107</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>
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</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">return</span> <span class="n">expression</span>
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</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a>
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</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a>
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</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a><span class="k">def</span> <span class="nf">_mergeable</span><span class="p">(</span>
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</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_mergeable</span><span class="p">(</span>
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</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span> <span class="n">from_or_join</span><span class="p">:</span> <span class="n">FromOrJoin</span>
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</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span>
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</span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a><span class="w"> </span><span class="sd">"""</span>
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@ -198,7 +198,7 @@
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</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a><span class="sd"> """</span>
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</span><span id="L-129"><a href="#L-129"><span class="linenos">129</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>
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</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a>
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</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">def</span> <span class="nf">_is_a_window_expression_in_unmergable_operation</span><span class="p">():</span>
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</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_is_a_window_expression_in_unmergable_operation</span><span class="p">():</span>
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</span><span id="L-132"><a href="#L-132"><span class="linenos">132</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>
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</span><span id="L-133"><a href="#L-133"><span class="linenos">133</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>
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</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="n">inner_select_name</span> <span class="o">=</span> <span class="n">from_or_join</span><span class="o">.</span><span class="n">alias_or_name</span>
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@ -216,7 +216,7 @@
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</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="p">]</span>
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</span><span id="L-147"><a href="#L-147"><span class="linenos">147</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>
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</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a>
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</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">def</span> <span class="nf">_outer_select_joins_on_inner_select_join</span><span class="p">():</span>
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</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_outer_select_joins_on_inner_select_join</span><span class="p">():</span>
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</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a><span class="w"> </span><span class="sd">"""</span>
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</span><span id="L-151"><a href="#L-151"><span class="linenos">151</span></a><span class="sd"> All columns from the inner select in the ON clause must be from the first FROM table.</span>
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</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a>
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@ -247,7 +247,7 @@
|
|||
</span><span id="L-177"><a href="#L-177"><span class="linenos">177</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-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="p">)</span>
|
||||
</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a>
|
||||
</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">def</span> <span class="nf">_is_recursive</span><span class="p">():</span>
|
||||
</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">def</span><span class="w"> </span><span class="nf">_is_recursive</span><span class="p">():</span>
|
||||
</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="c1"># Recursive CTEs look like this:</span>
|
||||
</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="c1"># WITH RECURSIVE cte AS (</span>
|
||||
</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="c1"># SELECT * FROM x <-- inner scope</span>
|
||||
|
|
@ -291,7 +291,7 @@
|
|||
</span><span id="L-221"><a href="#L-221"><span class="linenos">221</span></a> <span class="p">)</span>
|
||||
</span><span id="L-222"><a href="#L-222"><span class="linenos">222</span></a>
|
||||
</span><span id="L-223"><a href="#L-223"><span class="linenos">223</span></a>
|
||||
</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="k">def</span> <span class="nf">_rename_inner_sources</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">alias</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-224"><a href="#L-224"><span class="linenos">224</span></a><span class="k">def</span><span class="w"> </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">Scope</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="n">alias</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-225"><a href="#L-225"><span class="linenos">225</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-226"><a href="#L-226"><span class="linenos">226</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-227"><a href="#L-227"><span class="linenos">227</span></a><span class="sd"> """</span>
|
||||
|
|
@ -321,7 +321,7 @@
|
|||
</span><span id="L-251"><a href="#L-251"><span class="linenos">251</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-252"><a href="#L-252"><span class="linenos">252</span></a>
|
||||
</span><span id="L-253"><a href="#L-253"><span class="linenos">253</span></a>
|
||||
</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a><span class="k">def</span> <span class="nf">_merge_from</span><span class="p">(</span>
|
||||
</span><span id="L-254"><a href="#L-254"><span class="linenos">254</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_merge_from</span><span class="p">(</span>
|
||||
</span><span id="L-255"><a href="#L-255"><span class="linenos">255</span></a> <span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span>
|
||||
</span><span id="L-256"><a href="#L-256"><span class="linenos">256</span></a> <span class="n">inner_scope</span><span class="p">:</span> <span class="n">Scope</span><span class="p">,</span>
|
||||
</span><span id="L-257"><a href="#L-257"><span class="linenos">257</span></a> <span class="n">node_to_replace</span><span class="p">:</span> <span class="n">t</span><span class="o">.</span><span class="n">Union</span><span class="p">[</span><span class="n">exp</span><span class="o">.</span><span class="n">Subquery</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">Table</span><span class="p">],</span>
|
||||
|
|
@ -344,7 +344,7 @@
|
|||
</span><span id="L-274"><a href="#L-274"><span class="linenos">274</span></a> <span class="p">)</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><span id="L-277"><a href="#L-277"><span class="linenos">277</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">Scope</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="n">from_or_join</span><span class="p">:</span> <span class="n">FromOrJoin</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-277"><a href="#L-277"><span class="linenos">277</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_merge_joins</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">from_or_join</span><span class="p">:</span> <span class="n">FromOrJoin</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-278"><a href="#L-278"><span class="linenos">278</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-279"><a href="#L-279"><span class="linenos">279</span></a><span class="sd"> Merge JOIN clauses of inner query into outer query.</span>
|
||||
</span><span id="L-280"><a href="#L-280"><span class="linenos">280</span></a><span class="sd"> """</span>
|
||||
|
|
@ -369,7 +369,7 @@
|
|||
</span><span id="L-299"><a href="#L-299"><span class="linenos">299</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-300"><a href="#L-300"><span class="linenos">300</span></a>
|
||||
</span><span id="L-301"><a href="#L-301"><span class="linenos">301</span></a>
|
||||
</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a><span class="k">def</span> <span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">alias</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-302"><a href="#L-302"><span class="linenos">302</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_merge_expressions</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">alias</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-303"><a href="#L-303"><span class="linenos">303</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-304"><a href="#L-304"><span class="linenos">304</span></a><span class="sd"> Merge projections of inner query into outer query.</span>
|
||||
</span><span id="L-305"><a href="#L-305"><span class="linenos">305</span></a>
|
||||
|
|
@ -403,7 +403,7 @@
|
|||
</span><span id="L-333"><a href="#L-333"><span class="linenos">333</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">copy</span><span class="p">())</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><span id="L-336"><a href="#L-336"><span class="linenos">336</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">Scope</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="n">from_or_join</span><span class="p">:</span> <span class="n">FromOrJoin</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-336"><a href="#L-336"><span class="linenos">336</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_merge_where</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="n">from_or_join</span><span class="p">:</span> <span class="n">FromOrJoin</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-337"><a href="#L-337"><span class="linenos">337</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-338"><a href="#L-338"><span class="linenos">338</span></a><span class="sd"> Merge WHERE clause of inner query into outer query.</span>
|
||||
</span><span id="L-339"><a href="#L-339"><span class="linenos">339</span></a>
|
||||
|
|
@ -438,7 +438,7 @@
|
|||
</span><span id="L-368"><a href="#L-368"><span class="linenos">368</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-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 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">Scope</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="o">-></span> <span class="kc">None</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="w"> </span><span class="nf">_merge_order</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="o">-></span> <span class="kc">None</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"> Merge ORDER clause of inner query into outer query.</span>
|
||||
</span><span id="L-374"><a href="#L-374"><span class="linenos">374</span></a>
|
||||
|
|
@ -458,7 +458,7 @@
|
|||
</span><span id="L-388"><a href="#L-388"><span class="linenos">388</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-389"><a href="#L-389"><span class="linenos">389</span></a>
|
||||
</span><span id="L-390"><a href="#L-390"><span class="linenos">390</span></a>
|
||||
</span><span id="L-391"><a href="#L-391"><span class="linenos">391</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">Scope</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="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-391"><a href="#L-391"><span class="linenos">391</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_merge_hints</span><span class="p">(</span><span class="n">outer_scope</span><span class="p">:</span> <span class="n">Scope</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="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-392"><a href="#L-392"><span class="linenos">392</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-393"><a href="#L-393"><span class="linenos">393</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-394"><a href="#L-394"><span class="linenos">394</span></a> <span class="k">return</span>
|
||||
|
|
@ -470,7 +470,7 @@
|
|||
</span><span id="L-400"><a href="#L-400"><span class="linenos">400</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-401"><a href="#L-401"><span class="linenos">401</span></a>
|
||||
</span><span id="L-402"><a href="#L-402"><span class="linenos">402</span></a>
|
||||
</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a><span 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 class="n">Scope</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-403"><a href="#L-403"><span class="linenos">403</span></a><span class="k">def</span><span class="w"> </span><span class="nf">_pop_cte</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="o">-></span> <span class="kc">None</span><span class="p">:</span>
|
||||
</span><span id="L-404"><a href="#L-404"><span class="linenos">404</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="L-405"><a href="#L-405"><span class="linenos">405</span></a><span class="sd"> Remove CTE from the AST.</span>
|
||||
</span><span id="L-406"><a href="#L-406"><span class="linenos">406</span></a>
|
||||
|
|
@ -498,7 +498,7 @@
|
|||
|
||||
</div>
|
||||
<a class="headerlink" href="#merge_subqueries"></a>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="merge_subqueries-18"><a href="#merge_subqueries-18"><span class="linenos">18</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="merge_subqueries-18"><a href="#merge_subqueries-18"><span class="linenos">18</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
||||
</span><span id="merge_subqueries-19"><a href="#merge_subqueries-19"><span class="linenos">19</span></a><span class="w"> </span><span class="sd">"""</span>
|
||||
</span><span id="merge_subqueries-20"><a href="#merge_subqueries-20"><span class="linenos">20</span></a><span class="sd"> Rewrite sqlglot AST to merge derived tables into the outer query.</span>
|
||||
</span><span id="merge_subqueries-21"><a href="#merge_subqueries-21"><span class="linenos">21</span></a>
|
||||
|
|
@ -538,7 +538,7 @@
|
|||
|
||||
<blockquote>
|
||||
<div class="pdoc-code codehilite">
|
||||
<pre><span></span><code><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">sqlglot</span>
|
||||
<pre><span></span><code><span class="gp">>>> </span><span class="kn">import</span><span class="w"> </span><span class="nn">sqlglot</span>
|
||||
<span class="gp">>>> </span><span class="n">expression</span> <span class="o">=</span> <span class="n"><a href="../../sqlglot.html#parse_one">sqlglot.parse_one</a></span><span class="p">(</span><span class="s2">"SELECT a FROM (SELECT x.a FROM x) CROSS JOIN y"</span><span class="p">)</span>
|
||||
<span class="gp">>>> </span><span class="n">merge_subqueries</span><span class="p">(</span><span class="n">expression</span><span class="p">)</span><span class="o">.</span><span class="n">sql</span><span class="p">()</span>
|
||||
<span class="go">'SELECT x.a FROM x CROSS JOIN y'</span>
|
||||
|
|
@ -581,7 +581,7 @@ queries if it would result in multiple table selects in a single query:</p>
|
|||
<div class="attr variable">
|
||||
<span class="name">UNMERGABLE_ARGS</span> =
|
||||
<input id="UNMERGABLE_ARGS-view-value" class="view-value-toggle-state" type="checkbox" aria-hidden="true" tabindex="-1">
|
||||
<label class="view-value-button pdoc-button" for="UNMERGABLE_ARGS-view-value"></label><span class="default_value">{'distinct', 'locks', 'operation_modifiers', 'offset', 'format', 'prewhere', 'pivots', 'group', 'kind', 'limit', 'sample', 'connect', 'laterals', 'sort', 'distribute', 'qualify', 'having', 'into', 'cluster', 'settings', 'options', 'windows', 'with', 'match'}</span>
|
||||
<label class="view-value-button pdoc-button" for="UNMERGABLE_ARGS-view-value"></label><span class="default_value">{'limit', 'connect', 'format', 'options', 'sample', 'match', 'with', 'prewhere', 'settings', 'having', 'kind', 'pivots', 'offset', 'group', 'operation_modifiers', 'sort', 'cluster', 'distinct', 'locks', 'laterals', 'windows', 'qualify', 'distribute', 'into'}</span>
|
||||
|
||||
|
||||
</div>
|
||||
|
|
@ -614,7 +614,7 @@ 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-71"><a href="#merge_ctes-71"><span class="linenos"> 71</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="merge_ctes-71"><a href="#merge_ctes-71"><span class="linenos"> 71</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_ctes</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</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">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-73"><a href="#merge_ctes-73"><span class="linenos"> 73</span></a>
|
||||
</span><span id="merge_ctes-74"><a href="#merge_ctes-74"><span class="linenos"> 74</span></a> <span class="c1"># All places where we select from CTEs.</span>
|
||||
|
|
@ -663,7 +663,7 @@ 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-105"><a href="#merge_derived_tables-105"><span class="linenos">105</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">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
||||
<div class="pdoc-code codehilite"><pre><span></span><span id="merge_derived_tables-105"><a href="#merge_derived_tables-105"><span class="linenos">105</span></a><span class="k">def</span><span class="w"> </span><span class="nf">merge_derived_tables</span><span class="p">(</span><span class="n">expression</span><span class="p">:</span> <span class="n">E</span><span class="p">,</span> <span class="n">leave_tables_isolated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">E</span><span class="p">:</span>
|
||||
</span><span id="merge_derived_tables-106"><a href="#merge_derived_tables-106"><span class="linenos">106</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-107"><a href="#merge_derived_tables-107"><span class="linenos">107</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-108"><a href="#merge_derived_tables-108"><span class="linenos">108</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>
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue