MDEV-15570 Assertion `Item_cache_temporal::field_type() != MYSQL_TYPE_TIME'...

MDEV-15570 Assertion `Item_cache_temporal::field_type() != MYSQL_TYPE_TIME' failed in Item_cache_temporal::val_datetime_packed

remove an assert. TIME value can be used (and cached) in a datetime context

mysql-test/r/type_temporal_innodb.result

@@ -154,3 +154,9 @@ SELECT 1 FROM t1 WHERE (SELECT a FROM t1 group by c) = b;
 Warnings:
 Warning	1292	Incorrect datetime value: ''
 DROP TABLE t1;
+CREATE TABLE t1 (d DATE) ENGINE=InnoDB;
+INSERT INTO t1 VALUES ('2012-12-21');
+SELECT * FROM t1 WHERE LEAST( UTC_TIME(), d );
+d
+2012-12-21
+DROP TABLE t1;

mysql-test/t/type_temporal_innodb.test

@@ -58,3 +58,11 @@ SELECT * FROM t1 IGNORE KEY (b) WHERE b='';
 SELECT * FROM t1 WHERE a=b;
 SELECT 1 FROM t1 WHERE (SELECT a FROM t1 group by c) = b;
 DROP TABLE t1;
+
+#
+# MDEV-15570 Assertion `Item_cache_temporal::field_type() != MYSQL_TYPE_TIME' failed in Item_cache_temporal::val_datetime_packed
+#
+CREATE TABLE t1 (d DATE) ENGINE=InnoDB;
+INSERT INTO t1 VALUES ('2012-12-21');
+SELECT * FROM t1 WHERE LEAST( UTC_TIME(), d );
+DROP TABLE t1;

sql/item.cc

@@ -9707,7 +9707,6 @@ Item_cache_temporal::Item_cache_temporal(THD *thd,
 longlong Item_cache_temporal::val_datetime_packed()
 {
   DBUG_ASSERT(fixed == 1);
-  DBUG_ASSERT(Item_cache_temporal::field_type() != MYSQL_TYPE_TIME);
   if ((!value_cached && !cache_value()) || null_value)
   {
     null_value= TRUE;