Fix for bug#22397 Events: crash with procedure which alters events

  
ALTER EVENT in stored procedure body led to a crash during the
procedure call. Affected was only ALTER EVENT which changed the
interval of the event. No problems with AT, STARTS, ENDS and so on.



mysql-test/r/events_bugs.result:
  fix result
mysql-test/t/events_bugs.test:
  add test case for bug 22397 : Events, crash with procedure which alters body
sql/event_data_objects.cc:
  fix copy&paste error in code, which resulted in bug#22397
  Events: crash with procedure which alters body

1 files changed, 13 insertions, 0 deletions

diff --git a/mysql-test/r/events_bugs.result b/mysql-test/r/events_bugs.result
index 458fd151130..08be6924e03 100644
--- a/mysql-test/r/events_bugs.result
+++ b/mysql-test/r/events_bugs.result
@@ -213,4 +213,17 @@ create event e_53 on schedule every 5 second starts (select s1 from ttx) do drop
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) do drop table t' at line 1
 create event e_53 on schedule every 5 second ends (select s1 from ttx) do drop table t;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) do drop table t' at line 1
+drop event if exists e_16;
+drop procedure if exists p_16;
+create event e_16 on schedule every 1 second do set @a=5;
+create procedure p_16 () alter event e_16 on schedule every @a second;
+set @a = null;
+call p_16();
+ERROR HY000: Incorrect INTERVAL value: 'NULL'
+call p_16();
+ERROR HY000: Incorrect INTERVAL value: 'NULL'
+set @a= 6;
+call p_16();
+drop procedure p_16;
+drop event e_16;
 drop database events_test;