Force need_tmp to true if we have window functions.

9a2d895f · Vicențiu Ciorbaru · Sergei Petrunia · cb83e6c8 · 9a2d895f
Commit 9a2d895f authored Feb 02, 2016 by Vicențiu Ciorbaru Committed by Sergei Petrunia Feb 14, 2016
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sql/sql_select.cc sql/sql_select.cc +4 -0

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--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -1819,6 +1819,10 @@ JOIN::optimize_inner()
  }

  need_tmp= test_if_need_tmp_table();
+  //TODO this could probably go in test_if_need_tmp_table.
+  if (this->select_lex->window_specs.elements > 0) {
+    need_tmp= TRUE;
+  }

  /*
    If the hint FORCE INDEX FOR ORDER BY/GROUP BY is used for the table