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fixed union rexecution bug

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mysql-test/r/subselect.result:
  test for union rexecution bug
mysql-test/t/subselect.test:
  test for union rexecution bug
This commit is contained in:
unknown
2002-10-27 21:29:40 +02:00
parent 5a3fe219fb
commit d2c7f44ff6
5 changed files with 14 additions and 6 deletions
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8
sql/sql_union.cc
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@@ -199,8 +199,12 @@ int st_select_lex_unit::exec()
{
DBUG_ENTER("st_select_lex_unit::exec");
SELECT_LEX *lex_select_save= thd->lex.select;
if(depended || !item || !item->assigned())
if (executed && !depended)
DBUG_RETURN(0);
executed= 1;
if (depended || !item || !item->assigned())
{
if (optimized && item && item->assigned())
item->assigned(0); // We will reinit & rexecute unit