#-----------------------------------------------------------------------
# Multi-threaded tests
#-----------------------------------------------------------------------
# Show that only one connection can hold the backup lock.
connection default;
BACKUP STAGE START;
connect con1,localhost,root,,;
SET STATEMENT lock_wait_timeout=0 FOR BACKUP STAGE START;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
BACKUP STAGE START;
connection default;
# Show that the connection con1 has to wait for the backup lock and the
# corresponding representation within the processlist.
SET @con1_id = <con1_id>;
SELECT ID, USER, COMMAND, STATE, INFO, STAGE, MAX_STAGE, INFO_BINARY
FROM information_schema.processlist WHERE id = @con1_id;
ID	USER	COMMAND	STATE	INFO	STAGE	MAX_STAGE	INFO_BINARY
<con1_id>	root	Query	Waiting for backup lock	BACKUP STAGE START	0	0	BACKUP STAGE START
BACKUP STAGE END;
connection con1;
# The connection default has removed the backup lock.
# And so the current connection con1 can reap for its BACKUP STAGE START
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_START	Backup lock		
connect con2,localhost,root,,;
# The connection con2 cannot continue the work of con1 by setting the
# next BACKUP STAGE FLUSH.
BACKUP STAGE FLUSH;
ERROR HY000: You must start backup with "BACKUP STAGE START"
BACKUP STAGE START;
connection default;
SET @con2_id = <con2_id>;
# Connection con2 waits for the backup lock held by con1.
SELECT ID, USER, COMMAND, STATE, INFO, STAGE, MAX_STAGE, INFO_BINARY
FROM information_schema.processlist WHERE id = @con2_id;
ID	USER	COMMAND	STATE	INFO	STAGE	MAX_STAGE	INFO_BINARY
<con2_id>	root	Query	Waiting for backup lock	BACKUP STAGE START	0	0	BACKUP STAGE START
disconnect con1;
connection con2;
# Connection con1 frees the backup lock held by disconnecting.
# So connection con2 gets the backup lock.
connect con3,localhost,root,,;
BACKUP STAGE START;
connection default;
SET @con3_id = <con3_id>;
# Connection con3 waits for the backup lock held by con2.
SELECT ID, USER, COMMAND, STATE, INFO, STAGE, MAX_STAGE, INFO_BINARY
FROM information_schema.processlist WHERE id = @con3_id;
ID	USER	COMMAND	STATE	INFO	STAGE	MAX_STAGE	INFO_BINARY
<con3_id>	root	Query	Waiting for backup lock	BACKUP STAGE START	0	0	BACKUP STAGE START
KILL CONNECTION @con2_id;
connection con3;
# Connection con2 frees the backup lock held by getting killed.
# So connection con3 gets the backup lock.
BACKUP STAGE END;
disconnect con3;
connection default;
CREATE TABLE t_permanent_innodb (col1 INT) ENGINE = InnoDB;
INSERT INTO t_permanent_innodb SET col1 = 1;
CREATE TABLE t_permanent_myisam (col1 INT) ENGINE = MyISAM;
INSERT INTO t_permanent_myisam SET col1 = 1;
connect backup,localhost,root,,;
connect con11,localhost,root,,;
SET AUTOCOMMIT = 0;
set session lock_wait_timeout=1;
connect con12,localhost,root,,;
SET AUTOCOMMIT = 1;
# Between (connection default) BACKUP STAGE START and FLUSH
# no restrictions for concurrent sessions regarding DDL or DML
# affecting transactional/non transactional permanent tables.
connection backup;
BACKUP STAGE START;
connection con11;
UPDATE t_permanent_innodb SET col1 = 2;
UPDATE t_permanent_myisam SET col1 = 2;
SELECT COUNT(*) FROM t_permanent_innodb;
COUNT(*)
1
HANDLER t_permanent_innodb OPEN;
HANDLER t_permanent_innodb READ FIRST;
col1
2
HANDLER t_permanent_innodb CLOSE;
SELECT COUNT(*) FROM t_permanent_myisam;
COUNT(*)
1
HANDLER t_permanent_myisam OPEN;
HANDLER t_permanent_myisam READ FIRST;
col1
2
HANDLER t_permanent_myisam CLOSE;
CREATE TABLE t_con1_innodb (col1 INT) ENGINE = InnoDB;
CREATE TABLE t_con1_myisam (col1 INT) ENGINE = InnoDB;
ALTER TABLE t_permanent_innodb ADD COLUMN col2 INT;
ALTER TABLE t_permanent_myisam ADD COLUMN col2 INT;
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_innodb;
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_myisam;
connection con12;
UPDATE t_permanent_innodb SET col1 = 3;
UPDATE t_permanent_myisam SET col1 = 3;
# Between (connection default) BACKUP STAGE FLUSH and BLOCK_DDL
# concurrent sessions
# - can change transactional permanent tables with DDL and DML
# - can run DROP/CREATE transactional/non transactional TABLE
# - cannot modify non transactional permanent tables with DDL or DML
connection backup;
BACKUP STAGE FLUSH;
connection con11;
UPDATE t_permanent_innodb SET col1 = 4;
SET STATEMENT lock_wait_timeout=0 FOR UPDATE t_permanent_myisam SET col1 = 4;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT COUNT(*) FROM t_permanent_innodb;
COUNT(*)
1
HANDLER t_permanent_innodb OPEN;
HANDLER t_permanent_innodb READ FIRST;
col1	col2
4	NULL
HANDLER t_permanent_innodb CLOSE;
SELECT COUNT(*) FROM t_permanent_myisam;
COUNT(*)
1
HANDLER t_permanent_myisam OPEN;
HANDLER t_permanent_myisam READ FIRST;
col1	col2
3	NULL
HANDLER t_permanent_myisam CLOSE;
DROP TABLE t_con1_innodb;
DROP TABLE t_con1_myisam;
CREATE TABLE t_con1_innodb (col1 INT) ENGINE = InnoDB;
CREATE TABLE t_con1_myisam (col1 INT) ENGINE = InnoDB;
ALTER TABLE t_permanent_innodb ADD COLUMN col3 INT;
SET STATEMENT lock_wait_timeout=0 FOR ALTER TABLE t_permanent_myisam ADD COLUMN col3 INT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_innodb;
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_myisam;
connection con12;
UPDATE t_permanent_innodb SET col1 = 5;
# Between (connection default) BACKUP STAGE BLOCK_DDL and BLOCK_COMMIT
# concurrent sessions
# - can change transactional permanent tables with DML
# - cannot run DDL
# - cannot change non transactional permanent tables with DML
connection backup;
BACKUP STAGE BLOCK_DDL;
connection con11;
UPDATE t_permanent_innodb SET col1 = 6;
UPDATE t_permanent_myisam SET col1 = 6;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT COUNT(*) FROM t_permanent_innodb;
COUNT(*)
1
HANDLER t_permanent_innodb OPEN;
HANDLER t_permanent_innodb READ FIRST;
col1	col2	col3
6	NULL	NULL
HANDLER t_permanent_innodb CLOSE;
SELECT COUNT(*) FROM t_permanent_myisam;
COUNT(*)
1
HANDLER t_permanent_myisam OPEN;
HANDLER t_permanent_myisam READ FIRST;
col1	col2
3	NULL
HANDLER t_permanent_myisam CLOSE;
DROP TABLE t_con1_innodb;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
CREATE TABLE throw_away (col1 INT) ENGINE = InnoDB;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
ALTER TABLE t_permanent_innodb ADD COLUMN col4 INT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_innodb;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
CREATE OR REPLACE VIEW v_some_view AS SELECT * FROM t_permanent_myisam;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection con12;
UPDATE t_permanent_innodb SET col1 = 7;
# Between (connection default) BACKUP STAGE BLOCK_COMMIT and END
# concurrent sessions
# - can change transactional permanent tables with DML
# - cannot run DDL
# - cannot change non transactional permanent tables with DML
connection backup;
BACKUP STAGE BLOCK_COMMIT;
connection con11;
UPDATE t_permanent_innodb SET col1 = 8;
UPDATE t_permanent_myisam SET col1 = 8;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT COUNT(*) FROM t_permanent_innodb;
COUNT(*)
1
HANDLER t_permanent_innodb OPEN;
HANDLER t_permanent_innodb READ FIRST;
col1	col2	col3
8	NULL	NULL
HANDLER t_permanent_innodb CLOSE;
SELECT COUNT(*) FROM t_permanent_myisam;
COUNT(*)
1
HANDLER t_permanent_myisam OPEN;
HANDLER t_permanent_myisam READ FIRST;
col1	col2
3	NULL
HANDLER t_permanent_myisam CLOSE;
DROP TABLE t_con1_innodb;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
DROP TABLE t_con1_myisam;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection con12;
SET STATEMENT lock_wait_timeout=1 FOR UPDATE t_permanent_innodb SET col1 = 9;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection backup;
BACKUP STAGE END;
connection con11;
COMMIT;
SELECT * FROM t_permanent_innodb ORDER BY col1;
col1	col2	col3
7	NULL	NULL
SELECT * FROM t_permanent_myisam ORDER BY col1;
col1	col2
3	NULL
SET AUTOCOMMIT = 0;
SET GLOBAL tx_read_only = 1;
connection con12;
BACKUP STAGE START;
BACKUP STAGE END;
SET GLOBAL tx_read_only = 0;
DROP VIEW v_some_view;
DROP TABLE t_con1_innodb;
DROP TABLE t_con1_myisam;
# Connection backup holds the backup log and is on some stage.
# Connection con11 tries to LOCK TABLEs or to set read_only.
connection backup;
BACKUP STAGE START;
connection con11;
# Between BACKUP STAGE START and FLUSH:
# No restrictions for other connection around LOCK TABLES or read-only.
LOCK TABLES t_permanent_innodb READ;
LOCK TABLES t_permanent_myisam READ;
LOCK TABLES t_permanent_innodb WRITE;
LOCK TABLES t_permanent_myisam WRITE;
UNLOCK TABLES;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
connection backup;
BACKUP STAGE FLUSH;
connection con11;
# Between BACKUP STAGE FLUSH and BLOCK_COMMIT:
# Connection con11 not holding the backup lock cannot
# LOCK WRITE non transactional table.
LOCK TABLES t_permanent_innodb READ;
LOCK TABLES t_permanent_myisam READ;
LOCK TABLES t_permanent_innodb WRITE;
LOCK TABLES t_permanent_myisam WRITE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UNLOCK TABLES;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
connection backup;
BACKUP STAGE BLOCK_DDL;
connection con11;
# Between BACKUP STAGE FLUSH and BLOCK_COMMIT:
# Connection con11 not holding the backup lock cannot
# LOCK WRITE transactional or non transactional table.
LOCK TABLES t_permanent_innodb READ;
LOCK TABLES t_permanent_myisam READ;
LOCK TABLES t_permanent_innodb WRITE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
LOCK TABLES t_permanent_myisam WRITE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UNLOCK TABLES;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
connection backup;
BACKUP STAGE BLOCK_COMMIT;
connection con11;
# Between BACKUP BLOCK_COMMIT FLUSH and END:
# Connection con11 not holding the backup lock cannot
# LOCK WRITE transactional or non transactional table.
LOCK TABLES t_permanent_innodb READ;
LOCK TABLES t_permanent_myisam READ;
LOCK TABLES t_permanent_innodb WRITE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
LOCK TABLES t_permanent_myisam WRITE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UNLOCK TABLES;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
connection backup;
BACKUP STAGE END;
DROP TABLE t_permanent_innodb;
DROP TABLE t_permanent_myisam;
#
# Log tables
#
connection backup;
SET @old_general_log = @@general_log;
SET @old_slow_query_log = @@slow_query_log;
SET @old_log_output = @@log_output;
SET GLOBAL log_output = 'TABLE';
SET GLOBAL general_log = ON;
SET GLOBAL slow_query_log = ON;
connection con11;
SET @old_long_query_time = @@SESSION.long_query_time;
SET SESSION long_query_time = 0;
connection backup;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
connection con11;
SELECT 1;
1
1
connection backup;
SELECT 1;
1
1
connection con11;
SET SESSION long_query_time = @old_long_query_time;
connection backup;
BACKUP STAGE END;
SET GLOBAL log_output = @old_log_output;
SET GLOBAL slow_query_log = @old_slow_query_log;
SET GLOBAL general_log = @old_general_log;
#-----------------------------------------------------------------------
# Cleanup
#-----------------------------------------------------------------------
SET GLOBAL lock_wait_timeout = <old_lock_wait_timeout>;
disconnect con2;
disconnect con11;
disconnect con12;
disconnect backup;
connection default;