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MDEV-17362: SIGSEGV in JOIN::optimize_inner or Assertion `fixed == 0' failed in Item_equal::fix_fields, server crashes after 2nd execution of PS

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Move reinitialisation of pushdown variables for every query, because it used now not only for derived tables.
This commit is contained in:
Oleksandr Byelkin
2019-04-02 15:04:45 +02:00
parent 6c306a729d
commit eb056f8726
5 changed files with 73 additions and 7 deletions
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5
sql/sql_derived.cc
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@ -1293,11 +1293,6 @@ bool mysql_derived_reinit(THD *thd, LEX *lex, TABLE_LIST *derived)
unit->types.empty();
/* for derived tables & PS (which can't be reset by Item_subselect) */
unit->reinit_exec_mechanism();
for (st_select_lex *sl= unit->first_select(); sl; sl= sl->next_select())
{
sl->cond_pushed_into_where= NULL;
sl->cond_pushed_into_having= NULL;
}
unit->set_thd(thd);
DBUG_RETURN(FALSE);
}