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# ==== Purpose ====
#
# Test verifies that there are no duplicate entries in binlog (i.e a safe
# statement which follows an unsafe statement gets logged in both row format
# and statement format resulting in duplicate entry) when binlog-format=MIXED
# and LOCK TABLES are enabled.
#
# ==== Implementation ====
#
# Steps:
# 1 - Create three tables t1,t2 and t3 with AUTO_INCREMENT on.
# 2 - Create a trigger on table t3, so that trigger execution results in
# unsafe statement. Note query that modifies autoinc column in
# sub-statement can make the master and slave inconsistent. Hence they
# are logged in row format.
# 3 - Lock tables t1,t2 and t3.
# 4 - Execute an unsafe update which modifies tables t1 and t3. But since t2
# table is also locked its table map event also gets written into the
# binary log during the execution of update.
# 5 - Execute a safe DML operation using table 't2' and verify that master
# doesn't report any assert.
# 6 - Ensure that slave is in sync with master and data is consistent.
#
# ==== References ====
#
# MDEV-19158: MariaDB 10.2.22 is writing duplicate entries into binary log
--source include/have_binlog_format_mixed.inc
--source include/master-slave.inc
CREATE TABLE t1 (id mediumint(8) unsigned NOT NULL AUTO_INCREMENT, someLabel varchar(30) NOT NULL, flag tinyint(1) NOT NULL DEFAULT 0, PRIMARY KEY (id)) Engine=MyISAM;
CREATE TABLE t2 (id mediumint(8) unsigned NOT NULL AUTO_INCREMENT, data varchar(30) NOT NULL, status tinyint(1) NOT NULL, PRIMARY KEY (id)) Engine=MyISAM;
CREATE TABLE t3 (id mediumint(8) unsigned NOT NULL AUTO_INCREMENT, t1id mediumint(8) unsigned NOT NULL, flag tinyint(1) NOT NULL DEFAULT 0, status tinyint(1) NOT NULL DEFAULT 0, PRIMARY KEY (id)) Engine=MyISAM;
INSERT INTO t1 ( id, someLabel, flag ) VALUES ( 1, 'ABC', 0 );
DELIMITER |;
CREATE OR REPLACE TRIGGER doNothing
BEFORE UPDATE ON t1
FOR EACH ROW
BEGIN
IF
new.someLabel != old.someLabel
THEN
UPDATE t3 SET t3.flag = 0;
END IF;
END|
DELIMITER ;|
FLUSH LOGS;
LOCK TABLES t1 WRITE, t2 WRITE;
INSERT INTO t2 (data, status) VALUES ('1', 4);
UPDATE t1 SET flag = 1 WHERE id = 1;
INSERT INTO t2 (data, status) VALUES ('2', 4);
UNLOCK TABLES;
sync_slave_with_master;
let $diff_tables= master:t1, slave:t1;
--source include/diff_tables.inc
let $diff_tables= master:t2, slave:t2;
--source include/diff_tables.inc
let $diff_tables= master:t3, slave:t3;
--source include/diff_tables.inc
--connection master
DROP TABLE t1, t2, t3;
--source include/rpl_end.inc
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