mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-29 10:14:19 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Better comments in Item_in_subselect::inject_in_to_exists_cond()

Browse source
This commit is contained in:
Sergei Petrunia 2022-04-07 15:40:34 +03:00
parent 53b580a91c
commit 5a8766a980
1 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
sql/item_subselect.cc
View file

@ -2757,6 +2757,8 @@ bool Item_in_subselect::inject_in_to_exists_cond(JOIN *join_arg)
}
where_item= and_items(thd, join_arg->conds, where_item);
/* This is the fix_fields() call mentioned in the comment above */
if (!where_item->fixed && where_item->fix_fields(thd, 0))
DBUG_RETURN(true);
// TIMOUR TODO: call optimize_cond() for the new where clause
@ -2767,7 +2769,10 @@ bool Item_in_subselect::inject_in_to_exists_cond(JOIN *join_arg)
/* Attach back the list of multiple equalities to the new top-level AND. */
if (and_args && join_arg->cond_equal)
{
/* The argument list of the top-level AND may change after fix fields. */
/*
The fix_fields() call above may have changed the argument list, so
fetch it again:
*/
and_args= ((Item_cond*) join_arg->conds)->argument_list();
((Item_cond_and *) (join_arg->conds))->m_cond_equal=
*join_arg->cond_equal;