MDEV-4653 Wrong result for CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5')

mysql-test/r/timezone2.result

@@ -309,3 +309,22 @@ CONVERT_TZ(1, 1, a)
 NULL
 DROP TABLE t1;
 End of 5.1 tests
+#
+# Start of 5.3 tests
+#
+#
+# MDEV-4653 Wrong result for CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5')
+#
+SELECT CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5');
+CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5')
+NULL
+Warnings:
+Warning	1292	Incorrect datetime value: '00:00:00'
+SELECT CONVERT_TZ(TIME('2010-01-01 00:00:00'),'+00:00','+7:5');
+CONVERT_TZ(TIME('2010-01-01 00:00:00'),'+00:00','+7:5')
+NULL
+Warnings:
+Warning	1292	Incorrect datetime value: '00:00:00'
+#
+# End of 5.3 tests
+#

mysql-test/t/timezone2.test

@@ -284,3 +284,19 @@ SELECT CONVERT_TZ(1, 1, a) FROM t1;
 DROP TABLE t1;
 
 --echo End of 5.1 tests
+
+
+--echo #
+--echo # Start of 5.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-4653 Wrong result for CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5')
+--echo #
+
+SELECT CONVERT_TZ(TIME('00:00:00'),'+00:00','+7:5');
+SELECT CONVERT_TZ(TIME('2010-01-01 00:00:00'),'+00:00','+7:5');
+
+--echo #
+--echo # End of 5.3 tests
+--echo #

sql/item_timefunc.cc

@@ -1923,7 +1923,9 @@ bool Item_date_add_interval::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
 {
   INTERVAL interval;
 
-  if (args[0]->get_date(ltime, 0) ||
+  if (args[0]->get_date(ltime,
+                        cached_field_type == MYSQL_TYPE_TIME ?
+                        TIME_TIME_ONLY : 0) ||
       get_interval_value(args[1], int_type, &value, &interval))
     return (null_value=1);
 
@@ -2301,7 +2303,9 @@ bool Item_time_typecast::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
   if (ltime->time_type != MYSQL_TIMESTAMP_TIME)
     ltime->year= ltime->month= ltime->day= 0;
   ltime->time_type= MYSQL_TIMESTAMP_TIME;
-  return 0;
+  return (fuzzy_date & TIME_TIME_ONLY) ? 0 :
+         (null_value= check_date_with_warn(ltime, fuzzy_date,
+                                           MYSQL_TIMESTAMP_ERROR)); 
 }