#
# Check backup and FTWRL
#
flush tables with read lock;
backup stage start;
ERROR HY000: Can't execute the query because you have a conflicting read lock
unlock tables;
backup stage start;
flush tables with read lock;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
backup stage end;
#
# Check backup and FLUSH TABLES
#
flush tables;
backup stage start;
flush tables;
backup stage end;
#
# Check BACKUP STAGE under lock tables
#
create table t1 (a int);
lock table t1 write;
backup stage start;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
backup stage end;
ERROR HY000: You must start backup with "BACKUP STAGE START"
unlock tables;
lock table t1 read;
backup stage start;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
backup stage end;
ERROR HY000: You must start backup with "BACKUP STAGE START"
unlock tables;
#
# Check lock tables under BACKUP STAGE
#
backup stage start;
unlock tables;
select lock_mode from information_schema.metadata_lock_info where thread_id>0;
lock_mode
MDL_BACKUP_START
lock table t1 write;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
lock table t1 read;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
unlock tables;
backup stage end;
drop table t1;
#
# Check setting readonly under BACKUP STAGE
#
backup stage start;
set @@global.read_only=1;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
backup stage end;
# also make sure going back from read-only mode is not allowed
set @@global.read_only=1;
backup stage start;
set @@global.read_only=0;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
backup stage end;
set @@global.read_only=0;
#
# Check BACKUP STAGE under read_only
#
set @@global.read_only=1;
backup stage start;
backup stage end;
set @@global.read_only=0;
#
# Check that we can't create tables during backup
#
backup stage start;
create table t1 (a int);
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
backup stage end;
# also make sure we can't write to a table during backup
create table t1(a INT);
backup stage start;
insert into t1 values(1);
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
insert delayed into t1 values(1);
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
update t1 set a=1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
delete from t1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
truncate table t1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
drop table t1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
backup stage end;
drop table t1;
#
# BACKUP STAGE performs implicit commits
#
create table t1(a int) engine=InnoDB;
begin;
insert into t1 values(1);
select lock_mode from information_schema.metadata_lock_info where thread_id>0;
lock_mode
MDL_SHARED_WRITE
backup stage start;
select lock_mode from information_schema.metadata_lock_info where thread_id>0;
lock_mode
MDL_BACKUP_START
backup stage block_commit;
commit;
backup stage end;
drop table t1;
# Ensure that BACKUP STAGE ... does AUTOCOMMIT like most DDL.
# Sideeffect:
# Show the impact of not yet committed INSERT before sequence start
# and ROLLBACK sliding through the sequence.
CREATE TABLE t1 (col1 INT) ENGINE = InnoDB;
SET AUTOCOMMIT = 0;
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
ROLLBACK;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
ROLLBACK;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
ROLLBACK;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
ROLLBACK;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
BACKUP STAGE END;
ROLLBACK;
SELECT COUNT(*) = 5 AS expect_1 FROM t1;
expect_1
1
# Show the impact of not yet committed INSERT before sequence start
# and a COMMIT sliding through the sequence.
SET AUTOCOMMIT = 0;
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
COMMIT;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
COMMIT;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
COMMIT;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
COMMIT;
BACKUP STAGE END;
#----
INSERT INTO t1 SET col1 = 1;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
BACKUP STAGE END;
COMMIT;
SELECT COUNT(*) = 10 AS expect_1 FROM t1;
expect_1
1
DELETE FROM t1;
COMMIT;
drop table t1;
#
# CHECK: RO transaction under BACKUP STAGE is a potential deadlock
# OTOH we most probably allow them under FTWRL as well
#
CREATE TABLE t1 (col1 INT) ENGINE = InnoDB;
insert into t1 values (1);
backup stage start;
backup stage block_commit;
begin;
select * from t1;
col1
1
select lock_mode from information_schema.metadata_lock_info where thread_id>0;
lock_mode
MDL_BACKUP_WAIT_COMMIT
MDL_SHARED_READ
backup stage end;
select lock_mode from information_schema.metadata_lock_info where thread_id>0;
lock_mode
drop table t1;
#
# Check that handler are closed by backup stage block_ddl
#
create table t1 (a int, key a (a));
insert into t1 (a) values (1), (2), (3), (4), (5);
handler t1 open;
handler t1 read a prev;
a
5
backup stage start;
handler t1 read a prev;
a
4
backup stage flush;
backup stage block_ddl;
handler t1 read a prev;
a
5
backup stage block_commit;
handler t1 read a prev;
a
4
backup stage end;
handler t1 close;
drop table t1;
# Show the fate and impact of some SELECT /HANDLER ... READ
# sliding through the sequence.
CREATE TABLE t1_innodb (col1 INT) ENGINE = InnoDB;
INSERT INTO t1_innodb values (1),(2),(3);
COMMIT;
CREATE TABLE t1_myisam (col1 INT) ENGINE = MyISAM;
INSERT INTO t1_myisam values (1),(2),(3);
BACKUP STAGE START;
SELECT COUNT(*) FROM t1_innodb;
COUNT(*)
3
SELECT * FROM t1_innodb;
col1
1
2
3
HANDLER t1_innodb OPEN;
HANDLER t1_innodb READ FIRST;
col1
1
HANDLER t1_innodb CLOSE;
SELECT COUNT(*) FROM t1_myisam;
COUNT(*)
3
HANDLER t1_myisam OPEN;
HANDLER t1_myisam READ FIRST;
col1
1
HANDLER t1_myisam CLOSE;
BACKUP STAGE FLUSH;
SELECT COUNT(*) FROM t1_innodb;
COUNT(*)
3
HANDLER t1_innodb OPEN;
HANDLER t1_innodb READ FIRST;
col1
1
HANDLER t1_innodb CLOSE;
SELECT COUNT(*) FROM t1_myisam;
COUNT(*)
3
HANDLER t1_myisam OPEN;
HANDLER t1_myisam READ FIRST;
col1
1
HANDLER t1_myisam CLOSE;
BACKUP STAGE BLOCK_DDL;
SELECT COUNT(*) FROM t1_innodb;
COUNT(*)
3
HANDLER t1_innodb OPEN;
HANDLER t1_innodb READ FIRST;
col1
1
HANDLER t1_innodb CLOSE;
SELECT COUNT(*) FROM t1_myisam;
COUNT(*)
3
HANDLER t1_myisam OPEN;
HANDLER t1_myisam READ FIRST;
col1
1
HANDLER t1_myisam CLOSE;
BACKUP STAGE BLOCK_COMMIT;
SELECT COUNT(*) FROM t1_innodb;
COUNT(*)
3
HANDLER t1_innodb OPEN;
HANDLER t1_innodb READ FIRST;
col1
1
HANDLER t1_innodb CLOSE;
SELECT COUNT(*) FROM t1_myisam;
COUNT(*)
3
HANDLER t1_myisam OPEN;
HANDLER t1_myisam READ FIRST;
col1
1
HANDLER t1_myisam CLOSE;
BACKUP STAGE END;
drop table t1_innodb,t1_myisam;
# Show the fate and impact of some SET GLOBAL tx_read_only = 1/0
# sliding through the sequence.
BACKUP STAGE START;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
BACKUP STAGE FLUSH;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
BACKUP STAGE BLOCK_DDL;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
BACKUP STAGE BLOCK_COMMIT;
SET GLOBAL tx_read_only = 1;
SET GLOBAL tx_read_only = 0;
BACKUP STAGE END;
# Show the fate and impact of some SET SESSION sql_log_bin = 0/1
# sliding through the sequence.
COMMIT;
SET SESSION sql_log_bin = 1;
BACKUP STAGE START;
SET SESSION sql_log_bin = 0;
SET SESSION sql_log_bin = 1;
BACKUP STAGE FLUSH;
SET SESSION sql_log_bin = 0;
SET SESSION sql_log_bin = 1;
BACKUP STAGE BLOCK_DDL;
SET SESSION sql_log_bin = 0;
SET SESSION sql_log_bin = 1;
BACKUP STAGE BLOCK_COMMIT;
SET SESSION sql_log_bin = 0;
SET SESSION sql_log_bin = 1;
BACKUP STAGE END;
#----
SET SESSION sql_log_bin = 0;
BACKUP STAGE START;
SET SESSION sql_log_bin = 1;
SET SESSION sql_log_bin = 0;
BACKUP STAGE FLUSH;
SET SESSION sql_log_bin = 1;
SET SESSION sql_log_bin = 0;
BACKUP STAGE BLOCK_DDL;
SET SESSION sql_log_bin = 1;
SET SESSION sql_log_bin = 0;
BACKUP STAGE BLOCK_COMMIT;
SET SESSION sql_log_bin = 1;
SET SESSION sql_log_bin = 0;
BACKUP STAGE END;
SET SESSION sql_log_bin = 1;
#-----------------------------------------------------------------------
# BACKUP STAGE statements are not allowed in stored routines
#-----------------------------------------------------------------------
CREATE TABLE t1 (col1 INT);
CREATE PROCEDURE p1()
BEGIN
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
BACKUP STAGE END;
END|
ERROR 0A000: BACKUP STAGE is not allowed in stored procedures
CREATE FUNCTION f1 (s CHAR(20)) RETURNS INT DETERMINISTIC
BEGIN
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
BACKUP STAGE END;
RETURN 1;
END|
ERROR 0A000: BACKUP STAGE is not allowed in stored procedures
CREATE TRIGGER tr1 BEFORE INSERT ON t1 FOR EACH ROW
BEGIN
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
BACKUP STAGE END;
END|
ERROR 0A000: BACKUP STAGE is not allowed in stored procedures
DROP TABLE t1;
#-----------------------------------------------------------------------
# Check BACKUP status variables
#-----------------------------------------------------------------------
SET SESSION lock_wait_timeout = 1;
FLUSH STATUS;
# Show how the status variable 'Com_backup' changes after BACKUP STAGE ..
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	0
BACKUP STAGE START;
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	1
BACKUP STAGE START;
ERROR HY000: Backup stage 'START' is same or before current backup stage 'START'
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	2
BACKUP STAGE FLUSH;
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	3
BACKUP STAGE BLOCK_DDL;
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	4
BACKUP STAGE BLOCK_COMMIT;
SHOW STATUS LIKE 'Com_backup';
Variable_name	Value
Com_backup	5
BACKUP STAGE END;
# In case the backup lock is taken by the current connection than
# - DML modifying some permanent table is not allowed
CREATE TABLE t1_innodb (col1 INT) ENGINE = InnoDB;
CREATE TABLE t1_myisam (col1 INT) ENGINE = MyISAM;
BACKUP STAGE START;
SET AUTOCOMMIT = 0;
INSERT INTO t1_innodb SET col1 = 1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
SET AUTOCOMMIT = 1;
INSERT INTO t1_innodb SET col1 = 1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
INSERT INTO t1_myisam SET col1 = 1;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
# - DDL creating or renaming a permanent table or a procedure etc.
#   is not allowed.                                                               
CREATE TABLE throw_away (col1 INT) ENGINE = InnoDB;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
RENAME TABLE t1_innodb To throw_away;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
CREATE PROCEDURE p1() SELECT 13;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
CREATE PROCEDURE p1() SELECT 13;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
BACKUP STAGE END;
DROP TABLE t1_innodb;
DROP TABLE t1_myisam;
#
# Creating and modifying TEMPORARY TABLES are allowed
#
BACKUP STAGE START;
BACKUP STAGE BLOCK_DDL;
CREATE TEMPORARY TABLE tmp (col1 INT);
DROP TEMPORARY TABLE tmp;
CREATE TEMPORARY TABLE t_temporary_innodb (col1 INT) ENGINE = InnoDB;
CREATE TEMPORARY TABLE t_temporary_myisam (col1 INT) ENGINE = MyISAM;
# - DML modifying that temporary table is allowed.
INSERT INTO t_temporary_innodb SET col1 = 1;
SELECT COUNT(*) FROM t_temporary_innodb;
COUNT(*)
1
INSERT INTO t_temporary_myisam SET col1 = 1;
SELECT COUNT(*) FROM t_temporary_myisam;
COUNT(*)
1
BACKUP STAGE END;
# Show the fate and impact of some auto committed INSERT into temporary
# table sliding through the sequence.
SET AUTOCOMMIT = 1;
BACKUP STAGE START;
INSERT INTO t_temporary_innodb SET col1 = 1;
INSERT INTO t_temporary_myisam SET col1 = 1;
BACKUP STAGE FLUSH;
INSERT INTO t_temporary_innodb SET col1 = 1;
INSERT INTO t_temporary_myisam SET col1 = 1;
BACKUP STAGE BLOCK_DDL;
INSERT INTO t_temporary_innodb SET col1 = 1;
INSERT INTO t_temporary_myisam SET col1 = 1;
BACKUP STAGE BLOCK_COMMIT;
INSERT INTO t_temporary_innodb SET col1 = 1;
INSERT INTO t_temporary_myisam SET col1 = 1;
BACKUP STAGE END;
SELECT COUNT(*) FROM t_temporary_innodb;
COUNT(*)
5
# Show the fate and impact of some DROP/CREATE TEMPORARY TABLE sliding
# through the sequence.
SET AUTOCOMMIT = 1;
BACKUP STAGE START;
DROP TEMPORARY TABLE t_temporary_innodb;
CREATE TEMPORARY TABLE t_temporary_innodb (col1 INT) ENGINE = InnoDB;
BACKUP STAGE FLUSH;
DROP TEMPORARY TABLE t_temporary_innodb;
CREATE TEMPORARY TABLE t_temporary_innodb (col1 INT) ENGINE = InnoDB;
BACKUP STAGE BLOCK_DDL;
DROP TEMPORARY TABLE t_temporary_innodb;
CREATE TEMPORARY TABLE t_temporary_innodb (col1 INT) ENGINE = InnoDB;
BACKUP STAGE BLOCK_COMMIT;
DROP TEMPORARY TABLE t_temporary_innodb;
CREATE TEMPORARY TABLE t_temporary_innodb (col1 INT) ENGINE = InnoDB;
BACKUP STAGE END;
# Show that even more DDL on the temporary table is allowed.
BACKUP STAGE START;
TRUNCATE t_temporary_innodb;
ALTER TABLE t_temporary_innodb ADD COLUMN col2 INT;
ALTER TABLE t_temporary_innodb ADD KEY idx(col2);
BACKUP STAGE END;
CREATE OR REPLACE TABLE t1 (pk INT PRIMARY KEY, f INT);
BACKUP STAGE START;
FLUSH TABLE t1 FOR EXPORT;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
FLUSH TABLE t1 WITH READ LOCK;
ERROR HY000: Can't execute the command as you have a BACKUP STAGE active
BACKUP STAGE END;
DROP TABLE t1;