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#
# Testing which locks we get from all stages
#
BACKUP STAGE START;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_START Backup lock
BACKUP STAGE FLUSH;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_FLUSH Backup lock
BACKUP STAGE BLOCK_DDL;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_WAIT_DDL Backup lock
BACKUP STAGE BLOCK_COMMIT;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_WAIT_COMMIT Backup lock
BACKUP STAGE END;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
#
# testing BACKUP STAGE LOCK's
#
connect con1,localhost,root,,;
connect con2,localhost,root,,;
connection default;
#
# testing if BACKUP STAGE FLUSH causes deadlocks with ALTER TABLE
#
create table t1 (a int) engine=innodb;
connection con2;
backup stage start;
connection default;
start transaction;
insert into t1 values (1);
connection con1;
alter table t1 add column (j int), algorithm copy;
connection con2;
backup stage flush;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_DDL Backup lock
MDL_BACKUP_FLUSH Backup lock
MDL_SHARED_WRITE Table metadata lock test t1
MDL_SHARED_UPGRADABLE Table metadata lock test t1
MDL_INTENTION_EXCLUSIVE Schema metadata lock test
SET STATEMENT max_statement_time=1 FOR backup stage block_ddl;
ERROR 70100: Query execution was interrupted (max_statement_time exceeded)
backup stage block_ddl;
connection default;
commit;
SELECT * FROM t1;
a
1
SET STATEMENT lock_wait_timeout=0 FOR INSERT INTO t1 values (2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
INSERT INTO t1 values (2,0);;
connection con2;
backup stage end;
connection con1;
connection default;
select * from t1;
a j
1 NULL
2 0
drop table t1;
# Test with inline alter table, which doesn't block block_commit
create table t1 (a int) engine=innodb;
start transaction;
insert into t1 values (1);
connection con1;
alter table t1 add column (j int);
connection con2;
backup stage start;
backup stage flush;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_ALTER_COPY Backup lock
MDL_BACKUP_FLUSH Backup lock
MDL_SHARED_WRITE Table metadata lock test t1
MDL_SHARED_UPGRADABLE Table metadata lock test t1
MDL_INTENTION_EXCLUSIVE Schema metadata lock test
backup stage block_ddl;
backup stage block_commit;
connection default;
SELECT * FROM t1;
a
1
commit;
connection con2;
backup stage end;
connection con1;
connection default;
drop table t1;
#
# testing if BACKUP STAGE FLUSH causes deadlocks with DROP TABLE
#
create table t1 (a int) engine=innodb;
start transaction;
insert into t1 values (1);
connection con1;
SET STATEMENT lock_wait_timeout=0 FOR DROP TABLE t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
DROP TABLE t1;
connection con2;
backup stage start;
backup stage flush;
SET STATEMENT lock_wait_timeout=0 FOR SELECT * FROM t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
backup stage block_ddl;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_WAIT_DDL Backup lock
MDL_SHARED_WRITE Table metadata lock test t1
MDL_INTENTION_EXCLUSIVE Schema metadata lock test
backup stage end;
connection default;
commit;
connection con1;
connection default;
#
# Check if backup stage block_dll + concurrent drop table blocks select
#
create table t1 (a int) engine=innodb;
backup stage start;
backup stage block_ddl;
connection con1;
DROP TABLE t1;
connection con2;
connection con2;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_BACKUP_WAIT_DDL Backup lock
SELECT * FROM t1;
a
connection default;
backup stage end;
connection con1;
connection default;
#
# Check if backup stage block_dll overrides ddl lock for drop table
#
create table t1 (a int) engine=innodb;
start transaction;
insert into t1 values (1);
connection con1;
SET STATEMENT lock_wait_timeout=0 FOR DROP TABLE t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
DROP TABLE t1;
connection con2;
backup stage start;
backup stage flush;
backup stage block_ddl;
connection default;
commit;
connection con2;
backup stage end;
connection con1;
connection default;
#
# Check if BACKUP STAGE BLOCK_COMMIT blocks commit
#
create table t1 (a int) engine=innodb;
start transaction;
insert into t1 values (1);
connection con1;
backup stage start;
backup stage block_commit;
connection default;
commit;
connection con1;
backup stage end;
connection default;
select * from t1;
a
1
drop table t1;
#
# Check if BACKUP STAGE BLOCK_DDL blocks create view
#
create table t1 (a int) engine=innodb;
connection con1;
backup stage start;
backup stage block_ddl;
connection default;
create view v1 as select * from t1;;
connection con1;
select count(*) = 1 from information_schema.processlist;
count(*) = 1
0
backup stage end;
connection default;
drop table t1;
drop view v1;
disconnect con1;
disconnect con2;
#
# Test backup stage and flush tables
#
BACKUP STAGE START ;
BACKUP STAGE BLOCK_DDL ;
FLUSH TABLES;
CREATE TEMPORARY TABLE t12345678_tmp (col1 INT);
drop table t12345678_tmp;
BACKUP STAGE END;
#
# Test BACKUP STAGES with lock timeouts
#
SET GLOBAL lock_wait_timeout=0;
CREATE TABLE t_permanent_innodb (col1 INT) ENGINE = InnoDB;
CREATE TABLE t_permanent_myisam (col1 INT) ENGINE = MyISAM;
CREATE TABLE t_permanent_aria (col1 INT) ENGINE = Aria transactional=1;
CREATE TABLE t_permanent_aria2 (col1 INT) ENGINE = Aria transactional=0;
INSERT INTO t_permanent_innodb SET col1 = 1;
INSERT INTO t_permanent_myisam SET col1 = 1;
INSERT INTO t_permanent_aria SET col1 = 1;
INSERT INTO t_permanent_aria2 SET col1 = 1;
CREATE TABLE t_con1_innodb (col1 INT) ENGINE = InnoDB;
CREATE TABLE t_con1_myisam (col1 INT) ENGINE = MyISAM;
connect con1,localhost,root,,;
connection default;
BACKUP STAGE START;
BACKUP STAGE FLUSH;
BACKUP STAGE BLOCK_DDL;
BACKUP STAGE BLOCK_COMMIT;
connection con1;
SET AUTOCOMMIT = 1;
UPDATE t_permanent_aria SET col1 = 1;
UPDATE t_permanent_innodb SET col1 = 1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UPDATE t_permanent_innodb SET col1 = 8;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UPDATE t_permanent_myisam SET col1 = 8;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UPDATE t_permanent_aria SET col1 = 8;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UPDATE t_permanent_aria2 SET col1 = 8;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
select * from t_permanent_innodb;
col1
1
select * from t_permanent_myisam;
col1
1
select * from t_permanent_aria;
col1
8
select * from t_permanent_aria2;
col1
1
SET AUTOCOMMIT = 0;
UPDATE t_permanent_innodb SET col1 = 9;
UPDATE t_permanent_aria SET col1 = 9;
UPDATE t_permanent_myisam SET col1 = 9;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UPDATE t_permanent_aria2 SET col1 = 9;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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 default;
BACKUP STAGE END;
select * from t_permanent_innodb;
col1
1
select * from t_permanent_myisam;
col1
1
select * from t_permanent_aria;
col1
9
select * from t_permanent_aria2;
col1
1
DROP TABLE t_permanent_myisam, t_permanent_innodb, t_permanent_aria, t_permanent_aria2;
DROP TABLE t_con1_innodb, t_con1_myisam;
disconnect con1;
set global lock_wait_timeout=default;
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