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Bug #44331 Restore of database with events produces warning in replication

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If an EVENT is created without the DEFINER clause set explicitly or with it set  
to CURRENT_USER, the master and slaves become inconsistent. This issue stems from 
the fact that in both cases, the DEFINER is set to the CURRENT_USER of the current 
thread. On the master, the CURRENT_USER is the mysqld's user, while on the slave,  
the CURRENT_USER is empty for the SQL Thread which is responsible for executing 
the statement.

To fix the problem, we do what follows. If the definer is not set explicitly,  
a DEFINER clause is added when writing the query into binlog; if 'CURRENT_USER' is 
used as the DEFINER, it is replaced with the value of the current user before 
writing to binlog.

mysql-test/suite/rpl/r/rpl_create_if_not_exists.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/r/rpl_drop_if_exists.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/r/rpl_events.result:
  Test result of Bug#44331
mysql-test/suite/rpl/r/rpl_innodb_mixed_dml.result:
  Updated the result file after fixing bug#44331
mysql-test/suite/rpl/t/rpl_events.test:
  Added test to verify if the definer is consistent between master and slave
  when the event is created without the DEFINER clause set explicitly or the
  DEFINER is set to CURRENT_USER
sql/events.cc:
  The "create_query_string" function is added to create a new query string 
  for removing executable comments.
sql/sql_yacc.yy:
  The remember_name token was added for recording the offset of EVENT_SYM.
This commit is contained in:
unknown
2009-08-29 16:52:22 +08:00
parent dc7106f5ca
commit f32c08bd0c
7 changed files with 131 additions and 12 deletions
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42
mysql-test/suite/rpl/r/rpl_events.result
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@ -191,5 +191,47 @@ select * from t28953;
END;|
ALTER EVENT event1 RENAME TO event2;
DROP EVENT event2;
CREATE TABLE test.t1(details CHAR(30));
CREATE EVENT /*!50000 event44331_1 */
ON SCHEDULE AT CURRENT_TIMESTAMP
ON COMPLETION PRESERVE DISABLE
DO INSERT INTO test.t1 VALUES('event event44331_1 fired - no definer');
CREATE DEFINER=CURRENT_USER /*!50000 EVENT event44331_2 */
ON SCHEDULE AT CURRENT_TIMESTAMP
ON COMPLETION PRESERVE DISABLE
DO INSERT INTO test.t1 VALUES('event event44331_2 fired - DEFINER=CURRENT_USER');
CREATE DEFINER=CURRENT_USER() EVENT event44331_3
ON SCHEDULE AT CURRENT_TIMESTAMP
ON COMPLETION PRESERVE DISABLE
DO INSERT INTO test.t1 VALUES('event event44331_3 fired - DEFINER=CURRENT_USER() function');
CREATE /*!50000 DEFINER='user44331' */ EVENT event44331_4
ON SCHEDULE AT CURRENT_TIMESTAMP
ON COMPLETION PRESERVE DISABLE
DO INSERT INTO test.t1 VALUES('event event44331_4 fired - DEFINER=user1');
Warnings:
Note 1449 The user specified as a definer ('user44331'@'%') does not exist
#on master
select EVENT_SCHEMA, EVENT_NAME, DEFINER from information_schema.events
where EVENT_NAME='event44331_1' || EVENT_NAME='event44331_2' ||
EVENT_NAME='event44331_3' || EVENT_NAME='event44331_4';
EVENT_SCHEMA EVENT_NAME DEFINER
test event44331_1 root@localhost
test event44331_2 root@localhost
test event44331_3 root@localhost
test event44331_4 user44331@%
#on slave
select EVENT_SCHEMA, EVENT_NAME, DEFINER from information_schema.events
where EVENT_NAME='event44331_1' || EVENT_NAME='event44331_2' ||
EVENT_NAME='event44331_3' || EVENT_NAME='event44331_4';
EVENT_SCHEMA EVENT_NAME DEFINER
test event44331_1 root@localhost
test event44331_2 root@localhost
test event44331_3 root@localhost
test event44331_4 user44331@%
SET @@global.event_scheduler= @old_event_scheduler;
DROP TABLE t28953;
DROP TABLE t1;
DROP EVENT event44331_1;
DROP EVENT event44331_2;
DROP EVENT event44331_3;
DROP EVENT event44331_4;