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MDEV-11129 CREATE OR REPLACE TABLE t1 AS SELECT spfunc() crashes if spfunc() references t1

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Fixed by extending unique_table() with a flag to not allow usage of
the replaced table.

I also cleaned up find_dup_table() to not use goto next.
I also added more comments to the code in find_dup_table()
This commit is contained in:
Monty 2018-05-16 21:51:46 +03:00
commit ef295c31e3
7 changed files with 82 additions and 22 deletions
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3
sql/sql_insert.cc
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@ -1483,7 +1483,8 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
{
Item *fake_conds= 0;
TABLE_LIST *duplicate;
if ((duplicate= unique_table(thd, table_list, table_list->next_global, 1)))
if ((duplicate= unique_table(thd, table_list, table_list->next_global,
CHECK_DUP_ALLOW_DIFFERENT_ALIAS)))
{
update_non_unique_table_error(table_list, "INSERT", duplicate);
DBUG_RETURN(TRUE);