diff --git a/mysql-test/t/type_datetime.test b/mysql-test/t/type_datetime.test
index d0fcf9c57de..5eb9d317a8c 100644
--- a/mysql-test/t/type_datetime.test
+++ b/mysql-test/t/type_datetime.test
@@ -206,6 +206,8 @@ select greatest(cast('01-01-01' as date), '01-01-02');
 select least(cast('01-01-01' as date), '01-01-02') + 0;
 select greatest(cast('01-01-01' as date), '01-01-02') + 0;
 select least(cast('01-01-01' as datetime), '01-01-02') + 0;
+select cast(least(cast('01-01-01' as datetime), '01-01-02') as signed);
+select cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal);
 --disable_warnings
 DROP PROCEDURE IF EXISTS test27759 ;
 --enable_warnings
diff --git a/sql/item_func.h b/sql/item_func.h
index 952c828b251..0443e394585 100644
--- a/sql/item_func.h
+++ b/sql/item_func.h
@@ -703,6 +703,7 @@ public:
   my_decimal *val_decimal(my_decimal *);
   void fix_length_and_dec();
   enum Item_result result_type () const { return cmp_type; }
+  bool result_as_longlong() { return compare_as_dates; };
   uint cmp_datetimes(ulonglong *value);
 };