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MDEV-15492: Subquery crash similar to MDEV-10050

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Detection of first execution of PS fixed.
More debug info.
This commit is contained in:
Oleksandr Byelkin
2018-03-21 12:13:37 +01:00
parent 2dd4e50d5f
commit f3994b7432
4 changed files with 65 additions and 1 deletions
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4
sql/sql_class.cc
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@ -2252,15 +2252,19 @@ void THD::check_and_register_item_tree_change(Item **place, Item **new_value,
void THD::rollback_item_tree_changes()
{
DBUG_ENTER("THD::rollback_item_tree_changes");
I_List_iterator<Item_change_record> it(change_list);
Item_change_record *change;
while ((change= it++))
{
DBUG_PRINT("info", ("Rollback: %p (%p) <- %p",
*change->place, change->place, change->old_value));
*change->place= change->old_value;
}
/* We can forget about changes memory: it's allocated in runtime memroot */
change_list.empty();
DBUG_VOID_RETURN;
}