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1 files changed, 113 insertions, 117 deletions
diff --git a/docs/sqlglot/optimizer/eliminate_subqueries.html b/docs/sqlglot/optimizer/eliminate_subqueries.html index 34e38b8..ae9a84b 100644 --- a/docs/sqlglot/optimizer/eliminate_subqueries.html +++ b/docs/sqlglot/optimizer/eliminate_subqueries.html @@ -139,118 +139,116 @@ </span><span id="L-81"><a href="#L-81"><span class="linenos"> 81</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> </span><span id="L-82"><a href="#L-82"><span class="linenos"> 82</span></a> </span><span id="L-83"><a href="#L-83"><span class="linenos"> 83</span></a> <span class="c1"># Now append the rest</span> -</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> -</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">derived_table_scopes</span> -</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="p">):</span> -</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> -</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> -</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="L-84"><a href="#L-84"><span class="linenos"> 84</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> +</span><span id="L-85"><a href="#L-85"><span class="linenos"> 85</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-86"><a href="#L-86"><span class="linenos"> 86</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-87"><a href="#L-87"><span class="linenos"> 87</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="L-88"><a href="#L-88"><span class="linenos"> 88</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> +</span><span id="L-89"><a href="#L-89"><span class="linenos"> 89</span></a> +</span><span id="L-90"><a href="#L-90"><span class="linenos"> 90</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> +</span><span id="L-91"><a href="#L-91"><span class="linenos"> 91</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="L-92"><a href="#L-92"><span class="linenos"> 92</span></a> +</span><span id="L-93"><a href="#L-93"><span class="linenos"> 93</span></a> <span class="k">return</span> <span class="n">expression</span> </span><span id="L-94"><a href="#L-94"><span class="linenos"> 94</span></a> -</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> <span class="k">return</span> <span class="n">expression</span> -</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a> -</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> -</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a><span class="k">def</span> <span class="nf">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_union</span><span class="p">:</span> -</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">return</span> <span class="n">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> -</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_derived_table</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">UDTF</span><span class="p">):</span> -</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">return</span> <span class="n">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> -</span><span id="L-105"><a href="#L-105"><span class="linenos">105</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> -</span><span id="L-106"><a href="#L-106"><span class="linenos">106</span></a> <span class="k">return</span> <span class="n">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a> -</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> -</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a><span class="k">def</span> <span class="nf">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-95"><a href="#L-95"><span class="linenos"> 95</span></a> +</span><span id="L-96"><a href="#L-96"><span class="linenos"> 96</span></a><span class="k">def</span> <span class="nf">_eliminate</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-97"><a href="#L-97"><span class="linenos"> 97</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_union</span><span class="p">:</span> +</span><span id="L-98"><a href="#L-98"><span class="linenos"> 98</span></a> <span class="k">return</span> <span class="n">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-99"><a href="#L-99"><span class="linenos"> 99</span></a> +</span><span id="L-100"><a href="#L-100"><span class="linenos">100</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_derived_table</span><span class="p">:</span> +</span><span id="L-101"><a href="#L-101"><span class="linenos">101</span></a> <span class="k">return</span> <span class="n">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-102"><a href="#L-102"><span class="linenos">102</span></a> +</span><span id="L-103"><a href="#L-103"><span class="linenos">103</span></a> <span class="k">if</span> <span class="n">scope</span><span class="o">.</span><span class="n">is_cte</span><span class="p">:</span> +</span><span id="L-104"><a href="#L-104"><span class="linenos">104</span></a> <span class="k">return</span> <span class="n">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-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><span id="L-107"><a href="#L-107"><span class="linenos">107</span></a><span class="k">def</span> <span class="nf">_eliminate_union</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-108"><a href="#L-108"><span class="linenos">108</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-109"><a href="#L-109"><span class="linenos">109</span></a> +</span><span id="L-110"><a href="#L-110"><span class="linenos">110</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> <span class="ow">or</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> </span><span id="L-111"><a href="#L-111"><span class="linenos">111</span></a> -</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">alias</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> <span class="ow">or</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> +</span><span id="L-112"><a href="#L-112"><span class="linenos">112</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> </span><span id="L-113"><a href="#L-113"><span class="linenos">113</span></a> -</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">alias</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-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="c1"># Try to maintain the selections</span> -</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span> -</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span> -</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> -</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expressions</span> -</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span> -</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="p">]</span> -</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="c1"># If not all selections have an alias, just select *</span> -</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">selects</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">expressions</span><span class="p">):</span> -</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"*"</span><span class="p">]</span> +</span><span id="L-114"><a href="#L-114"><span class="linenos">114</span></a> <span class="c1"># Try to maintain the selections</span> +</span><span id="L-115"><a href="#L-115"><span class="linenos">115</span></a> <span class="n">expressions</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">selects</span> +</span><span id="L-116"><a href="#L-116"><span class="linenos">116</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span> +</span><span id="L-117"><a href="#L-117"><span class="linenos">117</span></a> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">column</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">,</span> <span class="n">table</span><span class="o">=</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> +</span><span id="L-118"><a href="#L-118"><span class="linenos">118</span></a> <span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="n">expressions</span> +</span><span id="L-119"><a href="#L-119"><span class="linenos">119</span></a> <span class="k">if</span> <span class="n">e</span><span class="o">.</span><span class="n">alias_or_name</span> +</span><span id="L-120"><a href="#L-120"><span class="linenos">120</span></a> <span class="p">]</span> +</span><span id="L-121"><a href="#L-121"><span class="linenos">121</span></a> <span class="c1"># If not all selections have an alias, just select *</span> +</span><span id="L-122"><a href="#L-122"><span class="linenos">122</span></a> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">selects</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">expressions</span><span class="p">):</span> +</span><span id="L-123"><a href="#L-123"><span class="linenos">123</span></a> <span class="n">selects</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"*"</span><span class="p">]</span> +</span><span id="L-124"><a href="#L-124"><span class="linenos">124</span></a> +</span><span id="L-125"><a href="#L-125"><span class="linenos">125</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)))</span> </span><span id="L-126"><a href="#L-126"><span class="linenos">126</span></a> -</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="o">*</span><span class="n">selects</span><span class="p">)</span><span class="o">.</span><span class="n">from_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">alias</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">alias</span><span class="p">)))</span> -</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> -</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">alias</span> -</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> -</span><span id="L-132"><a href="#L-132"><span class="linenos">132</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> -</span><span id="L-133"><a href="#L-133"><span class="linenos">133</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias</span><span class="p">)),</span> -</span><span id="L-134"><a href="#L-134"><span class="linenos">134</span></a> <span class="p">)</span> -</span><span id="L-135"><a href="#L-135"><span class="linenos">135</span></a> -</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> -</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a><span class="k">def</span> <span class="nf">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-138"><a href="#L-138"><span class="linenos">138</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-139"><a href="#L-139"><span class="linenos">139</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> -</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> <span class="n">table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span><span class="p">)</span> -</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-127"><a href="#L-127"><span class="linenos">127</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-128"><a href="#L-128"><span class="linenos">128</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">alias</span> +</span><span id="L-129"><a href="#L-129"><span class="linenos">129</span></a> <span class="k">return</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> +</span><span id="L-130"><a href="#L-130"><span class="linenos">130</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> +</span><span id="L-131"><a href="#L-131"><span class="linenos">131</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">alias</span><span class="p">)),</span> +</span><span id="L-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><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">_eliminate_derived_table</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-136"><a href="#L-136"><span class="linenos">136</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-137"><a href="#L-137"><span class="linenos">137</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-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="n">table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">parent</span><span class="o">.</span><span class="n">alias</span> <span class="ow">or</span> <span class="n">name</span><span class="p">)</span> +</span><span id="L-140"><a href="#L-140"><span class="linenos">140</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">table</span><span class="p">)</span> +</span><span id="L-141"><a href="#L-141"><span class="linenos">141</span></a> +</span><span id="L-142"><a href="#L-142"><span class="linenos">142</span></a> <span class="k">return</span> <span class="n">cte</span> </span><span id="L-143"><a href="#L-143"><span class="linenos">143</span></a> -</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> <span class="k">return</span> <span class="n">cte</span> -</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a> -</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> -</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a><span class="k">def</span> <span class="nf">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-148"><a href="#L-148"><span class="linenos">148</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-149"><a href="#L-149"><span class="linenos">149</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="L-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">with_</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> -</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> -</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> -</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="c1"># Rename references to this CTE</span> -</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> -</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="k">if</span> <span class="n">source</span> <span class="ow">is</span> <span class="n">scope</span><span class="p">:</span> -</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> <span class="n">new_table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> -</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="n">table</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_table</span><span class="p">)</span> +</span><span id="L-144"><a href="#L-144"><span class="linenos">144</span></a> +</span><span id="L-145"><a href="#L-145"><span class="linenos">145</span></a><span class="k">def</span> <span class="nf">_eliminate_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-146"><a href="#L-146"><span class="linenos">146</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-147"><a href="#L-147"><span class="linenos">147</span></a> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> <span class="o">=</span> <span class="n">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="L-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">with_</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-150"><a href="#L-150"><span class="linenos">150</span></a> <span class="n">parent</span><span class="o">.</span><span class="n">pop</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">with_</span><span class="o">.</span><span class="n">expressions</span><span class="p">:</span> +</span><span id="L-152"><a href="#L-152"><span class="linenos">152</span></a> <span class="n">with_</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> +</span><span id="L-153"><a href="#L-153"><span class="linenos">153</span></a> +</span><span id="L-154"><a href="#L-154"><span class="linenos">154</span></a> <span class="c1"># Rename references to this CTE</span> +</span><span id="L-155"><a href="#L-155"><span class="linenos">155</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="L-156"><a href="#L-156"><span class="linenos">156</span></a> <span class="k">for</span> <span class="n">table</span><span class="p">,</span> <span class="n">source</span> <span class="ow">in</span> <span class="n">child_scope</span><span class="o">.</span><span class="n">selected_sources</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> +</span><span id="L-157"><a href="#L-157"><span class="linenos">157</span></a> <span class="k">if</span> <span class="n">source</span> <span class="ow">is</span> <span class="n">scope</span><span class="p">:</span> +</span><span id="L-158"><a href="#L-158"><span class="linenos">158</span></a> <span class="n">new_table</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">alias_</span><span class="p">(</span><span class="n">exp</span><span class="o">.</span><span class="n">table_</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">alias</span><span class="o">=</span><span class="n">table</span><span class="o">.</span><span class="n">alias_or_name</span><span class="p">)</span> +</span><span id="L-159"><a href="#L-159"><span class="linenos">159</span></a> <span class="n">table</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">new_table</span><span class="p">)</span> +</span><span id="L-160"><a href="#L-160"><span class="linenos">160</span></a> +</span><span id="L-161"><a href="#L-161"><span class="linenos">161</span></a> <span class="k">return</span> <span class="n">cte</span> </span><span id="L-162"><a href="#L-162"><span class="linenos">162</span></a> -</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> <span class="k">return</span> <span class="n">cte</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><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a><span class="k">def</span> <span class="nf">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> -</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a><span class="w"> </span><span class="sd">"""</span> -</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="sd"> Returns:</span> -</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a><span class="sd"> tuple of (name, cte)</span> -</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a><span class="sd"> where `name` is a new name for this CTE in the root scope and `cte` is a new CTE instance.</span> -</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a><span class="sd"> If this CTE duplicates an existing CTE, `cte` will be None.</span> -</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a><span class="sd"> """</span> -</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> -</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> -</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">alias</span> -</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> -</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">name</span><span class="p">:</span> -</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> -</span><span id="L-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">if</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> -</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> <span class="k">elif</span> <span class="n">taken</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> -</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-163"><a href="#L-163"><span class="linenos">163</span></a> +</span><span id="L-164"><a href="#L-164"><span class="linenos">164</span></a><span class="k">def</span> <span class="nf">_new_cte</span><span class="p">(</span><span class="n">scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">):</span> +</span><span id="L-165"><a href="#L-165"><span class="linenos">165</span></a><span class="w"> </span><span class="sd">"""</span> +</span><span id="L-166"><a href="#L-166"><span class="linenos">166</span></a><span class="sd"> Returns:</span> +</span><span id="L-167"><a href="#L-167"><span class="linenos">167</span></a><span class="sd"> tuple of (name, cte)</span> +</span><span id="L-168"><a href="#L-168"><span class="linenos">168</span></a><span class="sd"> where `name` is a new name for this CTE in the root scope and `cte` is a new CTE instance.</span> +</span><span id="L-169"><a href="#L-169"><span class="linenos">169</span></a><span class="sd"> If this CTE duplicates an existing CTE, `cte` will be None.</span> +</span><span id="L-170"><a href="#L-170"><span class="linenos">170</span></a><span class="sd"> """</span> +</span><span id="L-171"><a href="#L-171"><span class="linenos">171</span></a> <span class="n">duplicate_cte_alias</span> <span class="o">=</span> <span class="n">existing_ctes</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">)</span> +</span><span id="L-172"><a href="#L-172"><span class="linenos">172</span></a> <span class="n">parent</span> <span class="o">=</span> <span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span> +</span><span id="L-173"><a href="#L-173"><span class="linenos">173</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">parent</span><span class="o">.</span><span class="n">alias</span> +</span><span id="L-174"><a href="#L-174"><span class="linenos">174</span></a> +</span><span id="L-175"><a href="#L-175"><span class="linenos">175</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">name</span><span class="p">:</span> +</span><span id="L-176"><a href="#L-176"><span class="linenos">176</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="s2">"cte"</span><span class="p">)</span> +</span><span id="L-177"><a href="#L-177"><span class="linenos">177</span></a> +</span><span id="L-178"><a href="#L-178"><span class="linenos">178</span></a> <span class="k">if</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-179"><a href="#L-179"><span class="linenos">179</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">duplicate_cte_alias</span> +</span><span id="L-180"><a href="#L-180"><span class="linenos">180</span></a> <span class="k">elif</span> <span class="n">taken</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> +</span><span id="L-181"><a href="#L-181"><span class="linenos">181</span></a> <span class="n">name</span> <span class="o">=</span> <span class="n">find_new_name</span><span class="p">(</span><span class="n">taken</span><span class="o">=</span><span class="n">taken</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="n">name</span><span class="p">)</span> +</span><span id="L-182"><a href="#L-182"><span class="linenos">182</span></a> +</span><span id="L-183"><a href="#L-183"><span class="linenos">183</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> </span><span id="L-184"><a href="#L-184"><span class="linenos">184</span></a> -</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="n">taken</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">scope</span> -</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> -</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> -</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">name</span> -</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> -</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> -</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> -</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="p">)</span> -</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="k">else</span><span class="p">:</span> -</span><span id="L-194"><a href="#L-194"><span class="linenos">194</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="kc">None</span> -</span><span id="L-195"><a href="#L-195"><span class="linenos">195</span></a> <span class="k">return</span> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> +</span><span id="L-185"><a href="#L-185"><span class="linenos">185</span></a> <span class="k">if</span> <span class="ow">not</span> <span class="n">duplicate_cte_alias</span><span class="p">:</span> +</span><span id="L-186"><a href="#L-186"><span class="linenos">186</span></a> <span class="n">existing_ctes</span><span class="p">[</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">]</span> <span class="o">=</span> <span class="n">name</span> +</span><span id="L-187"><a href="#L-187"><span class="linenos">187</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="n">exp</span><span class="o">.</span><span class="n">CTE</span><span class="p">(</span> +</span><span id="L-188"><a href="#L-188"><span class="linenos">188</span></a> <span class="n">this</span><span class="o">=</span><span class="n">scope</span><span class="o">.</span><span class="n">expression</span><span class="p">,</span> +</span><span id="L-189"><a href="#L-189"><span class="linenos">189</span></a> <span class="n">alias</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">TableAlias</span><span class="p">(</span><span class="n">this</span><span class="o">=</span><span class="n">exp</span><span class="o">.</span><span class="n">to_identifier</span><span class="p">(</span><span class="n">name</span><span class="p">)),</span> +</span><span id="L-190"><a href="#L-190"><span class="linenos">190</span></a> <span class="p">)</span> +</span><span id="L-191"><a href="#L-191"><span class="linenos">191</span></a> <span class="k">else</span><span class="p">:</span> +</span><span id="L-192"><a href="#L-192"><span class="linenos">192</span></a> <span class="n">cte</span> <span class="o">=</span> <span class="kc">None</span> +</span><span id="L-193"><a href="#L-193"><span class="linenos">193</span></a> <span class="k">return</span> <span class="n">name</span><span class="p">,</span> <span class="n">cte</span> </span></pre></div> @@ -341,18 +339,16 @@ </span><span id="eliminate_subqueries-82"><a href="#eliminate_subqueries-82"><span class="linenos">82</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">cte_scope</span><span class="o">.</span><span class="n">expression</span><span class="o">.</span><span class="n">parent</span><span class="p">)</span> </span><span id="eliminate_subqueries-83"><a href="#eliminate_subqueries-83"><span class="linenos">83</span></a> </span><span id="eliminate_subqueries-84"><a href="#eliminate_subqueries-84"><span class="linenos">84</span></a> <span class="c1"># Now append the rest</span> -</span><span id="eliminate_subqueries-85"><a href="#eliminate_subqueries-85"><span class="linenos">85</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span> -</span><span id="eliminate_subqueries-86"><a href="#eliminate_subqueries-86"><span class="linenos">86</span></a> <span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">derived_table_scopes</span> -</span><span id="eliminate_subqueries-87"><a href="#eliminate_subqueries-87"><span class="linenos">87</span></a> <span class="p">):</span> -</span><span id="eliminate_subqueries-88"><a href="#eliminate_subqueries-88"><span class="linenos">88</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> -</span><span id="eliminate_subqueries-89"><a href="#eliminate_subqueries-89"><span class="linenos">89</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> -</span><span id="eliminate_subqueries-90"><a href="#eliminate_subqueries-90"><span class="linenos">90</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> -</span><span id="eliminate_subqueries-91"><a href="#eliminate_subqueries-91"><span class="linenos">91</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> -</span><span id="eliminate_subqueries-92"><a href="#eliminate_subqueries-92"><span class="linenos">92</span></a> -</span><span id="eliminate_subqueries-93"><a href="#eliminate_subqueries-93"><span class="linenos">93</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> -</span><span id="eliminate_subqueries-94"><a href="#eliminate_subqueries-94"><span class="linenos">94</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> -</span><span id="eliminate_subqueries-95"><a href="#eliminate_subqueries-95"><span class="linenos">95</span></a> -</span><span id="eliminate_subqueries-96"><a href="#eliminate_subqueries-96"><span class="linenos">96</span></a> <span class="k">return</span> <span class="n">expression</span> +</span><span id="eliminate_subqueries-85"><a href="#eliminate_subqueries-85"><span class="linenos">85</span></a> <span class="k">for</span> <span class="n">scope</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">(</span><span class="n">root</span><span class="o">.</span><span class="n">union_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">subquery_scopes</span><span class="p">,</span> <span class="n">root</span><span class="o">.</span><span class="n">table_scopes</span><span class="p">):</span> +</span><span id="eliminate_subqueries-86"><a href="#eliminate_subqueries-86"><span class="linenos">86</span></a> <span class="k">for</span> <span class="n">child_scope</span> <span class="ow">in</span> <span class="n">scope</span><span class="o">.</span><span class="n">traverse</span><span class="p">():</span> +</span><span id="eliminate_subqueries-87"><a href="#eliminate_subqueries-87"><span class="linenos">87</span></a> <span class="n">new_cte</span> <span class="o">=</span> <span class="n">_eliminate</span><span class="p">(</span><span class="n">child_scope</span><span class="p">,</span> <span class="n">existing_ctes</span><span class="p">,</span> <span class="n">taken</span><span class="p">)</span> +</span><span id="eliminate_subqueries-88"><a href="#eliminate_subqueries-88"><span class="linenos">88</span></a> <span class="k">if</span> <span class="n">new_cte</span><span class="p">:</span> +</span><span id="eliminate_subqueries-89"><a href="#eliminate_subqueries-89"><span class="linenos">89</span></a> <span class="n">new_ctes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_cte</span><span class="p">)</span> +</span><span id="eliminate_subqueries-90"><a href="#eliminate_subqueries-90"><span class="linenos">90</span></a> +</span><span id="eliminate_subqueries-91"><a href="#eliminate_subqueries-91"><span class="linenos">91</span></a> <span class="k">if</span> <span class="n">new_ctes</span><span class="p">:</span> +</span><span id="eliminate_subqueries-92"><a href="#eliminate_subqueries-92"><span class="linenos">92</span></a> <span class="n">expression</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="s2">"with"</span><span class="p">,</span> <span class="n">exp</span><span class="o">.</span><span class="n">With</span><span class="p">(</span><span class="n">expressions</span><span class="o">=</span><span class="n">new_ctes</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="n">recursive</span><span class="p">))</span> +</span><span id="eliminate_subqueries-93"><a href="#eliminate_subqueries-93"><span class="linenos">93</span></a> +</span><span id="eliminate_subqueries-94"><a href="#eliminate_subqueries-94"><span class="linenos">94</span></a> <span class="k">return</span> <span class="n">expression</span> </span></pre></div> |