From 970542ec90951c3e9d68ff310cdf181465854aaa Mon Sep 17 00:00:00 2001
From: Sergey Petrunya <psergey@askmonty.org>
Date: Fri, 23 Aug 2013 16:32:56 +0400
Subject: MDEV-4836: Wrong result on <not null date column> IS NULL (old
 documented hack stopped working) - When applying optimization introduced by
 MDEV-4817, ignore the conditions that have form   "datetime_not_null_col IS
 NULL".

---
 sql/sql_select.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sql/sql_select.h')

diff --git a/sql/sql_select.h b/sql/sql_select.h
index 478eede7108..fd12cfae335 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -1795,6 +1795,7 @@ ORDER *simple_remove_const(ORDER *order, COND *where);
 bool const_expression_in_where(COND *cond, Item *comp_item,
                                Field *comp_field= NULL,
                                Item **const_item= NULL);
+bool cond_is_datetime_is_null(Item *cond);
 
 /* Table elimination entry point function */
 void eliminate_tables(JOIN *join);
-- 
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