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Fixed bug mdev-4962.

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When a non-nullable datetime field is used under an IS NULL predicate
of the WHERE condition in a query with outer joins the remove_eq_conds
function should check whether this field belongs to an inner table
of any outer join that can be, in a general case, a nested outer join.
This commit is contained in:
Igor Babaev
2013-08-29 10:56:12 -07:00
parent 650d3266bb
commit 37f18d2318
5 changed files with 86 additions and 1 deletions
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2
sql/sql_select.cc
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@@ -13564,7 +13564,7 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
if (!(eq_cond= new Item_func_eq(args[0],new Item_int("0", 0, 2))))
return cond;
if (field->table->pos_in_table_list->outer_join)
if (field->table->pos_in_table_list->is_inner_table_of_outer_join())
{
// outer join: transform "col IS NULL" to "col IS NULL or col=0"
Item *or_cond= new Item_cond_or(eq_cond, cond);