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Backport of subquery optimizations to 5.3.

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There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
This commit is contained in:
Sergey Petrunya
2010-01-17 17:51:10 +03:00
parent 1a490f2da4
commit b83cb52e9e
57 changed files with 30727 additions and 504 deletions
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2
sql/sql_parse.cc
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@ -5041,6 +5041,7 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables)
param->select_limit=
new Item_int((ulonglong) thd->variables.select_limit);
}
thd->thd_marker.emb_on_expr_nest= NULL;
if (!(res= open_and_lock_tables(thd, all_tables)))
{
if (lex->describe)
@ -5760,6 +5761,7 @@ void mysql_reset_thd_for_next_command(THD *thd, my_bool calculate_userstat)
thd->query_plan_flags= QPLAN_INIT;
thd->query_plan_fsort_passes= 0;
thd->thd_marker.emb_on_expr_nest= NULL;
/*
Because we come here only for start of top-statements, binlog format is