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transaction BUG#52616 Temp table prevents switch binlog format from STATEMENT to ROW Before the WL#2687 and BUG#46364, every non-transactional change that happened after a transactional change was written to trx-cache and flushed upon committing the transaction. WL#2687 and BUG#46364 changed this behavior and non-transactional changes are now written to the binary log upon committing the statement. A binary log event is identified as transactional or non-transactional through a flag in the Log_event which is set taking into account the underlie storage engine on what it is stems from. In the current bug, this flag was not being set properly when the DROP TEMPORARY TABLE was executed. However, while fixing this bug we figured out that changes to temporary tables should be always written to the trx-cache if there is an on-going transaction. Otherwise, binlog events in the reversed order would be produced. Regarding concurrency, keeping changes to temporary tables in the trx-cache is also safe as temporary tables are only visible to the owner connection. In this patch, we classify the following statements as unsafe: 1 - INSERT INTO t_myisam SELECT * FROM t_myisam_temp 2 - INSERT INTO t_myisam_temp SELECT * FROM t_myisam 3 - CREATE TEMPORARY TABLE t_myisam_temp SELECT * FROM t_myisam On the other hand, the following statements are classified as safe: 1 - INSERT INTO t_innodb SELECT * FROM t_myisam_temp 2 - INSERT INTO t_myisam_temp SELECT * FROM t_innodb The patch also guarantees that transactions that have a DROP TEMPORARY are always written to the binary log regardless of the mode and the outcome: commit or rollback. In particular, the DROP TEMPORARY is extended with the IF EXISTS clause when the current statement logging format is set to row. Finally, the patch allows to switch from STATEMENT to MIXED/ROW when there are temporary tables but the contrary is not possible.
133 lines
3.1 KiB
Plaintext
133 lines
3.1 KiB
Plaintext
stop slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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reset master;
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reset slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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start slave;
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CREATE TABLE t4 (
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id INT(5) unsigned NOT NULL auto_increment,
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name varchar(15) NOT NULL default '',
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number varchar(35) NOT NULL default 'default',
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PRIMARY KEY (id),
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UNIQUE KEY unique_rec (name,number)
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) ENGINE=InnoDB;
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LOAD DATA
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INFILE '../../std_data/loaddata_pair.dat'
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REPLACE INTO TABLE t4
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(name,number);
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SELECT * FROM t4;
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id name number
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1 XXX 12345
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2 XXY 12345
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SELECT * FROM t4;
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id name number
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1 XXX 12345
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2 XXY 12345
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LOAD DATA
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INFILE '../../std_data/loaddata_pair.dat'
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REPLACE INTO TABLE t4
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(name,number);
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SELECT * FROM t4;
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id name number
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4 XXX 12345
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5 XXY 12345
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SELECT * FROM t4;
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id name number
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4 XXX 12345
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5 XXY 12345
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FLUSH LOGS;
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FLUSH LOGS;
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DROP DATABASE IF EXISTS mysqltest1;
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CREATE DATABASE mysqltest1;
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CREATE TEMPORARY TABLE mysqltest1.tmp (f1 BIGINT);
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CREATE TABLE mysqltest1.t1 (f1 BIGINT) ENGINE="InnoDB";
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SET AUTOCOMMIT = 0;
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-------- switch to slave --------
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ALTER TABLE mysqltest1.t1 ENGINE = MyISAM;
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SHOW CREATE TABLE mysqltest1.t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`f1` bigint(20) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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-------- switch to master --------
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INSERT INTO mysqltest1.t1 SET f1= 1;
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DROP TEMPORARY TABLE mysqltest1.tmp;
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ROLLBACK;
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SHOW CREATE TABLE mysqltest1.tmp;
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ERROR 42S02: Table 'mysqltest1.tmp' doesn't exist
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######### Must return no rows here #########
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SELECT COUNT(*) FROM mysqltest1.t1;
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COUNT(*)
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0
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INSERT INTO mysqltest1.t1 SET f1= 2;
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CREATE TEMPORARY TABLE mysqltest1.tmp2(a INT);
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ROLLBACK;
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SHOW CREATE TABLE mysqltest1.tmp2;
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Table Create Table
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tmp2 CREATE TEMPORARY TABLE `tmp2` (
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`a` int(11) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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######### Must return no rows here #########
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SELECT COUNT(*) FROM mysqltest1.t1;
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COUNT(*)
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0
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-------- switch to slave --------
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SHOW CREATE TABLE mysqltest1.tmp;
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ERROR 42S02: Table 'mysqltest1.tmp' doesn't exist
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SHOW CREATE TABLE mysqltest1.tmp2;
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ERROR 42S02: Table 'mysqltest1.tmp2' doesn't exist
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######### t1 has two rows here: the transaction not rolled back since t1 uses MyISAM #########
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SELECT COUNT(*) FROM mysqltest1.t1;
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COUNT(*)
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2
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FLUSH LOGS;
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-------- switch to master --------
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FLUSH LOGS;
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DROP DATABASE mysqltest1;
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End of 5.1 tests
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#
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# Bug#39675 rename tables on innodb tables with pending
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# transactions causes slave data issue.
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#
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DROP TABLE IF EXISTS t1;
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DROP TABLE IF EXISTS t2;
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DROP TABLE IF EXISTS t3;
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CREATE TABLE t1 (
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id INT PRIMARY KEY auto_increment,
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b INT DEFAULT NULL
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) ENGINE=InnoDB;
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CREATE TABLE t2 (
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id INT PRIMARY KEY auto_increment,
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b INT DEFAULT NULL
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) ENGINE=InnoDB;
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INSERT INTO t1 (b) VALUES (1),(2),(3);
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BEGIN;
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INSERT INTO t1(b) VALUES (4);
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-------- switch to master1 --------
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RENAME TABLE t1 TO t3, t2 TO t1;;
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-------- switch to master --------
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COMMIT;
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-------- switch to master1 --------
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-------- switch to master --------
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SELECT * FROM t1;
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id b
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SELECT * FROM t3;
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id b
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1 1
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2 2
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3 3
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4 4
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-------- switch to slave --------
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SELECT * FROM t1;
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id b
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SELECT * FROM t3;
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id b
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1 1
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2 2
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3 3
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4 4
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-------- switch to master --------
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DROP TABLE t1;
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DROP TABLE t3;
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End of 6.0 tests
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