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MDEV-15087 Item_func::fix_fields:

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Assertion `used_tables_cache == 0' failed

This bug manifested itself when executing queries
over materialized derived tables /vies and with
conjunctive always true predicates containing
inexpensive single-row subqueries.
This bug disappeared after the patch mdev-15035
had been applied.
This commit is contained in:
Igor Babaev
2018-07-25 23:28:31 -07:00
parent 0f90728bc0
commit 3c141e319a
3 changed files with 51 additions and 7 deletions
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14
sql/sql_select.cc
View File

@ -1368,6 +1368,13 @@ JOIN::optimize_inner()
conds= optimize_cond(this, conds, join_list, FALSE,
&cond_value, &cond_equal, OPT_LINK_EQUAL_FIELDS);
if (thd->is_error())
{
error= 1;
DBUG_PRINT("error",("Error from optimize_cond"));
DBUG_RETURN(1);
}
if (thd->lex->sql_command == SQLCOM_SELECT &&
optimizer_flag(thd, OPTIMIZER_SWITCH_COND_PUSHDOWN_FOR_DERIVED))
{
@ -1402,13 +1409,6 @@ JOIN::optimize_inner()
DBUG_RETURN(1);
}
if (thd->is_error())
{
error= 1;
DBUG_PRINT("error",("Error from optimize_cond"));
DBUG_RETURN(1);
}
{
having= optimize_cond(this, having, join_list, TRUE,
&having_value, &having_equal);