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Bug#54201: "SET INSERT_ID" event must be ignored if corresponding event is ignored

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An INSERT query log event is preceeded by an INSERT_ID intvar event if the
INSERT allocates a new auto_increment value. But if we ignore the INSERT
due to --replicate-ignore-table or similar, then the INSERT_ID event is
still executed, and the set value of INSERT_ID lingers around in the
slave sql thread THD object indefinitely until the next INSERT that
happens to need allocation of a new auto_increment value.

Normally this does not cause problems as such following INSERT would
normally come with its own INSERT_ID event. In this bug, the user had
a trigger on the slave which was missing on the master, and this
trigger had an INSERT which could be affected. In any case, it seems
better to not leave a stray INSERT_ID hanging around in the sql thread
THD indefinitely.

Note that events can also be skipped from apply_event_and_update_pos();
however it is not possible in that code to skip the INSERT without also
skipping the INSERT_ID event.
This commit is contained in:
unknown
2010-11-30 10:47:08 +01:00
parent d54f869f8c
commit e46d0aead0
4 changed files with 99 additions and 0 deletions
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29
mysql-test/suite/rpl/r/rpl_auto_increment.result
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@ -312,3 +312,32 @@ Comparing tables master:test.t2 and slave:test.t2
DROP TABLE t1;
DROP TABLE t2;
SET SQL_MODE='';
CREATE TABLE t1(s VARCHAR(10)) ENGINE=myisam;
CREATE TABLE t_ignored1(id INT AUTO_INCREMENT PRIMARY KEY) ENGINE=myisam;
CREATE TABLE test.slave_only(id INT AUTO_INCREMENT PRIMARY KEY) ENGINE=myisam;
INSERT INTO slave_only VALUES(NULL);
CREATE TRIGGER t1_update AFTER UPDATE ON t1 FOR EACH ROW INSERT INTO slave_only VALUES(NULL);
INSERT INTO t_ignored1 VALUES(NULL);
INSERT INTO t1 VALUES('s');
UPDATE t1 SET s='s1';
SELECT * FROM t1;
s
s1
CREATE TABLE t_ignored2(id INT AUTO_INCREMENT PRIMARY KEY) ENGINE=myisam;
STOP SLAVE;
SET GLOBAL sql_slave_skip_counter = 2;
START SLAVE;
INSERT INTO t_ignored2 VALUES(NULL);
UPDATE t1 SET s='s2';
SELECT * FROM t1;
s
s2
SHOW TABLES LIKE 't\_ignored_';
Tables_in_test (t\_ignored_)
t_ignored2
SELECT * FROM t_ignored2;
id
DROP TABLE slave_only;
DROP TABLE t1;
DROP TABLE t_ignored1;
DROP TABLE t_ignored2;

1
mysql-test/suite/rpl/t/rpl_auto_increment-slave.opt Normal file
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@ -0,0 +1 @@
--replicate-ignore-table=test.t_ignored1