bugfix: TIME_FORMAT() should be ok in stored generated columns

mysql-test/suite/vcol/r/vcol_supported_sql_funcs.result

@@ -2924,3 +2924,18 @@ a	b
 2001-01-01 02:03:04	02.03.04
 drop table t1;
 set sql_warnings = 0;
+# TIME_FORMAT() STORED
+set sql_warnings = 1;
+create table t1 (a datetime, b varchar(10) as (time_format(a,"%H.%i.%S")) STORED);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` datetime DEFAULT NULL,
+  `b` varchar(10) GENERATED ALWAYS AS (time_format(`a`,'%H.%i.%S')) STORED
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+insert into t1 values ('2001-01-01 02:03:04',default);
+select * from t1;
+a	b
+2001-01-01 02:03:04	02.03.04
+drop table t1;
+set sql_warnings = 0;

mysql-test/suite/vcol/t/vcol_supported_sql_funcs_main.inc

@@ -1209,3 +1209,9 @@ let $values1 = '2001-01-01 02:03:04',default;
 let $rows = 1;
 --source suite/vcol/inc/vcol_supported_sql_funcs.inc
 
+--echo # TIME_FORMAT() STORED
+let $cols = a datetime, b varchar(10) as (time_format(a,"%H.%i.%S")) STORED;
+let $values1 = '2001-01-01 02:03:04',default;
+let $rows = 1;
+--source suite/vcol/inc/vcol_supported_sql_funcs.inc
+

sql/item_timefunc.h

@@ -832,6 +832,8 @@ class Item_func_date_format :public Item_str_func
   bool eq(const Item *item, bool binary_cmp) const;
   bool check_vcol_func_processor(void *arg)
   {
+    if (is_time_format)
+      return false;
     return mark_unsupported_function(func_name(), "()", arg, VCOL_SESSION_FUNC);
   }
   Item *get_copy(THD *thd, MEM_ROOT *mem_root)