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IN TIME RECOVERY FAILURE ON SLAVES Problem: DROP TEMP TABLE IF EXISTS commands can cause point in time recovery (re-applying binlog) failures. Analyses: In RBR, 'DROP TEMPORARY TABLE' commands are always binlogged by adding 'IF EXISTS' clauses. Also, the slave SQL thread will not check replicate.* filter rules for "DROP TEMPORARY TABLE IF EXISTS" queries. If log-slave-updates is enabled on slave, these queries will be binlogged in the format of "USE `db`; DROP TEMPORARY TABLE IF EXISTS `t1`;" irrespective of filtering rules and irrespective of the `db` existence. When users try to recover slave from it's own binlog, use `db` command might fail if `db` is not present on slave. Fix: At the time of writing the 'DROP TEMPORARY TABLE IF EXISTS' query into the binlog, 'use `db`' will not be present and the table name in the query will be a fully qualified table name. Eg: 'USE `db`; DROP TEMPORARY TABLE IF EXISTS `t1`;' will be logged as 'DROP TEMPORARY TABLE IF EXISTS `db`.`t1`;'.
79 lines
3.0 KiB
Plaintext
79 lines
3.0 KiB
Plaintext
CREATE TABLE t1 (i int unique) ENGINE=innodb;
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reset master;
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begin;
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insert into t1 values (1),(2);
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*** the following UPDATE query wont generate any updates for the binlog ***
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update t1 set i = 3 where i < 3;
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ERROR 23000: Duplicate entry '3' for key 'i'
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commit;
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*** Results of the test: the binlog must have only Write_rows events not any Update_rows ***
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show binlog events from <binlog_start>;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Query # # BEGIN
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master-bin.000001 # Table_map # # table_id: # (test.t1)
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master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
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master-bin.000001 # Xid # # COMMIT /* XID */
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delete from t1;
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reset master;
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begin;
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insert into t1 values (1),(2);
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*** the following UPDATE query wont generate any updates for the binlog ***
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insert into t1 values (3),(4),(1),(2);
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ERROR 23000: Duplicate entry '1' for key 'i'
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commit;
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*** Results of the test: the binlog must have only one Write_rows event not two ***
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show binlog events from <binlog_start>;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Query # # BEGIN
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master-bin.000001 # Table_map # # table_id: # (test.t1)
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master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
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master-bin.000001 # Xid # # COMMIT /* XID */
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drop table t1;
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RESET MASTER;
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CREATE TABLE t1 ( c1 int , primary key (c1)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1), (2), (3);
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CREATE TEMPORARY TABLE IF NOT EXISTS t2 LIKE t1;
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TRUNCATE TABLE t2;
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DROP TABLE t1;
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###############################################
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### assertion: No event for 'TRUNCATE TABLE t2'
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###############################################
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show binlog events from <binlog_start>;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Query # # use `test`; CREATE TABLE t1 ( c1 int , primary key (c1)) ENGINE=InnoDB
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master-bin.000001 # Query # # BEGIN
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master-bin.000001 # Table_map # # table_id: # (test.t1)
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master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
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master-bin.000001 # Xid # # COMMIT /* XID */
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master-bin.000001 # Query # # use `test`; DROP TABLE `t1` /* generated by server */
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###############################################
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RESET MASTER;
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CREATE TEMPORARY TABLE t1 (c1 int) Engine=InnoDB;
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INSERT INTO t1 VALUES (1), (2), (3);
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TRUNCATE t1;
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DROP TEMPORARY TABLE t1;
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###############################################
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### assertion: No event for 'TRUNCATE TABLE t1'
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###############################################
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show binlog events from <binlog_start>;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Query # # DROP TEMPORARY TABLE IF EXISTS `test`.`t1` /* generated by server */
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###############################################
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#
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# Bug#12346411 SQL/LOG.CC:6509: ASSERTION `PREPARED_XIDS > 0' FAILED
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#
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DROP TABLE IF EXISTS t1, t2;
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CREATE TABLE t1(a INT PRIMARY KEY) engine=innodb;
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CREATE TABLE t2(a INT) engine=myisam;
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INSERT INTO t1 VALUES (1);
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START TRANSACTION;
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INSERT INTO t2 VALUES (1);
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INSERT IGNORE INTO t1 VALUES (1);
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COMMIT;
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INSERT INTO t1 VALUES (2);
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START TRANSACTION;
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INSERT INTO t2 VALUES (2);
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UPDATE IGNORE t1 SET a=1 WHERE a=2;
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COMMIT;
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DROP TABLE t1, t2;
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