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Bug #50087 Interval arithmetic for Event_queue_element is not portable.

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Subtraction of two unsigned months yielded a (very large) positive value.
Conversion of this to a signed value was not necessarily well defined.

Solution: do the subtraction on signed values.


mysql-test/r/events_scheduling.result:
  Add test case.
mysql-test/t/events_scheduling.test:
  Add test case.
sql/event_data_objects.cc:
  Convert month to signed before doing the subtraction.
This commit is contained in:
Tor Didriksen
2010-01-06 15:00:51 +01:00
parent f471d82bb5
commit a0f701ec17
3 changed files with 48 additions and 2 deletions
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19
mysql-test/r/events_scheduling.result
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@ -82,5 +82,24 @@ DROP TABLE table_1;
DROP TABLE table_2;
DROP TABLE table_3;
DROP TABLE table_4;
Bug #50087 Interval arithmetic for Event_queue_element is not portable.
CREATE TABLE t1(a int);
CREATE EVENT e1 ON SCHEDULE EVERY 1 MONTH
STARTS NOW() - INTERVAL 1 MONTH
ENDS NOW() + INTERVAL 2 MONTH
ON COMPLETION PRESERVE
DO
INSERT INTO t1 VALUES (1);
CREATE EVENT e2 ON SCHEDULE EVERY 1 MONTH
STARTS NOW()
ENDS NOW() + INTERVAL 11 MONTH
ON COMPLETION PRESERVE
DO
INSERT INTO t1 VALUES (1);
DROP TABLE t1;
DROP EVENT e1;
DROP EVENT e2;
DROP DATABASE events_test;
SET GLOBAL event_scheduler=@event_scheduler;