fix for bug#16419 (Events: can't use timestamp in the schedule)

WL #1034 (Internal CRON)

mysql-test/r/events.result

@@ -40,6 +40,15 @@ count(*)
 0
 drop event event3;
 drop table t_event3;
+create event e_26 on schedule at '2017-01-01 00:00:00' disabled do set @a = 5;
+select db, name, body, definer, convert_tz(execute_at, 'UTC', 'SYSTEM'), on_completion from mysql.event;
+db	name	body	definer	convert_tz(execute_at, 'UTC', 'SYSTEM')	on_completion
+events_test	e_26	 set @a = 5	root@localhost	2017-01-01 00:00:00	DROP
+drop event e_26;
+create event e_26 on schedule at NULL disabled do set @a = 5;
+ERROR HY000: Incorrect AT value: 'NULL'
+create event e_26 on schedule at 'definitely not a datetime' disabled do set @a = 5;
+ERROR HY000: Incorrect AT value: 'definitely not a datetime'
 set names utf8;
 create event задачка on schedule every 123 minute starts now() ends now() + interval 1 month do select 1;
 drop event задачка;

mysql-test/t/events.test

@@ -32,6 +32,15 @@ select count(*) from t_event3;
 drop event event3;
 drop table t_event3;
 
+
+create event e_26 on schedule at '2017-01-01 00:00:00' disabled do set @a = 5;
+select db, name, body, definer, convert_tz(execute_at, 'UTC', 'SYSTEM'), on_completion from mysql.event;
+drop event e_26;
+--error 1503
+create event e_26 on schedule at NULL disabled do set @a = 5;
+--error 1503
+create event e_26 on schedule at 'definitely not a datetime' disabled do set @a = 5;
+
 set names utf8;
 create event задачка on schedule every 123 minute starts now() ends now() + interval 1 month do select 1;
 drop event задачка;

sql/event_timed.cc

@@ -133,6 +133,7 @@ event_timed::init_body(THD *thd)
    0 - OK
    EVEX_PARSE_ERROR - fix_fields failed
    EVEX_BAD_PARAMS  - datetime is in the past
+   ER_WRONG_VALUE   - wrong value for execute at
 */
 
 int
@@ -148,19 +149,19 @@ event_timed::init_execute_at(THD *thd, Item *expr)
   if (expr->fix_fields(thd, &expr))
     DBUG_RETURN(EVEX_PARSE_ERROR);
 
-  if (expr->val_int() == MYSQL_TIMESTAMP_ERROR)
-    DBUG_RETURN(EVEX_BAD_PARAMS);
-
   // let's check whether time is in the past
   thd->variables.time_zone->gmt_sec_to_TIME(&time_tmp, 
                               (my_time_t) thd->query_start()); 
 
-  if (expr->val_int() < TIME_to_ulonglong_datetime(&time_tmp))
-    DBUG_RETURN(EVEX_BAD_PARAMS);
 
   if ((not_used= expr->get_date(&ltime, TIME_NO_ZERO_DATE)))
+    DBUG_RETURN(ER_WRONG_VALUE);
+
+  if (TIME_to_ulonglong_datetime(&ltime) <
+      TIME_to_ulonglong_datetime(&time_tmp))
     DBUG_RETURN(EVEX_BAD_PARAMS);
 
+
   /*
       This may result in a 1970-01-01 date if ltime is > 2037-xx-xx
       CONVERT_TZ has similar problem
@@ -292,8 +293,7 @@ int
 event_timed::init_starts(THD *thd, Item *new_starts)
 {
   my_bool not_used;
-  TIME ltime;
-  my_time_t my_time_tmp;
+  TIME ltime, time_tmp;
 
   DBUG_ENTER("event_timed::init_starts");
 
@@ -306,6 +306,14 @@ event_timed::init_starts(THD *thd, Item *new_starts)
   if ((not_used= new_starts->get_date(&ltime, TIME_NO_ZERO_DATE)))
     DBUG_RETURN(EVEX_BAD_PARAMS);
 
+  // let's check whether time is in the past
+  thd->variables.time_zone->gmt_sec_to_TIME(&time_tmp, 
+                              (my_time_t) thd->query_start()); 
+
+  if (TIME_to_ulonglong_datetime(&ltime) <
+      TIME_to_ulonglong_datetime(&time_tmp))
+    DBUG_RETURN(EVEX_BAD_PARAMS);
+
   /*
       This may result in a 1970-01-01 date if ltime is > 2037-xx-xx
       CONVERT_TZ has similar problem

sql/share/errmsg.txt

@@ -5793,7 +5793,7 @@ ER_EVENT_DATA_TOO_LONG
         eng "Data for column '%s' too long"
 ER_DROP_INDEX_FK
         eng "Cannot drop index '%-.64s': needed in a foreign key constraint"
-        ger "Kann Index '%-.64s' nicht lschen: wird fr einen einen Fremdschlssel bentigt"
+        ger "Kann Index '%-.64s' nicht lschen: wird fr einen Fremdschlssel bentigt"
 ER_CANT_WRITE_LOCK_LOG_TABLE
         eng "You can't write-lock a log table. Only read access is possible."
 ER_CANT_READ_LOCK_LOG_TABLE

sql/sql_yacc.yy

@@ -1436,6 +1436,16 @@ ev_schedule_time: EVERY_SYM expr interval
                 yyerror(ER(ER_SYNTAX_ERROR));
                 YYABORT;  
                 break;
+              case ER_WRONG_VALUE:
+                {
+                  char buff[120];
+                  String str(buff,(uint32) sizeof(buff), system_charset_info);
+                  String *str2= $2->val_str(&str);
+                  my_error(ER_WRONG_VALUE, MYF(0), "AT",
+                           str2? str2->c_ptr():"NULL");
+                  YYABORT;
+                  break;
+                }          
               case EVEX_BAD_PARAMS:
                 my_error(ER_EVENT_EXEC_TIME_IN_THE_PAST, MYF(0));
                 YYABORT;