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Added syntax and implementation for BACKUP STAGE's
Part of MDEV-5336 Implement LOCK FOR BACKUP - Changed check of Global_only_lock to also include BACKUP lock. - We store latest MDL_BACKUP_DDL lock in thd->mdl_backup_ticket to be able to downgrade lock during copy_data_between_tables()
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290
mysql-test/main/backup_lock.test
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290
mysql-test/main/backup_lock.test
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########################################################################
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# Tests BACKUP STAGE locking
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########################################################################
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--source include/have_innodb.inc
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--source include/have_metadata_lock_info.inc
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--source include/not_embedded.inc
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--echo #
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--echo # Testing which locks we get from all stages
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--echo #
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BACKUP STAGE START;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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BACKUP STAGE FLUSH;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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BACKUP STAGE BLOCK_DDL;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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BACKUP STAGE BLOCK_COMMIT;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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BACKUP STAGE END;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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--echo #
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--echo # testing BACKUP STAGE LOCK's
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--echo #
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# Following connections are used in a few of the following tests
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connect (con1,localhost,root,,);
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connect (con2,localhost,root,,);
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connection default;
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--echo #
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--echo # testing if BACKUP STAGE FLUSH causes deadlocks with ALTER TABLE
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--echo #
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create table t1 (a int) engine=innodb;
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start transaction;
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# Acquires MDL lock
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insert into t1 values (1);
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connection con1;
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# Waits on MDL
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--send alter table t1 add column (j int), algorithm copy
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connection con2;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table metadata lock";
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--source include/wait_condition.inc
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backup stage start;
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backup stage flush;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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#
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# Do first test with max_statement_time, other tests later are done with
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# lock_wait_timeout. This is mostly to ensure that both methods works
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#
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--error ER_STATEMENT_TIMEOUT
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SET STATEMENT max_statement_time=1 FOR backup stage block_ddl;
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--send backup stage block_ddl
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connection default;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for backup lock";
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--source include/wait_condition.inc
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commit;
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# The following select works because alter table is waiting for DDL lock
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SELECT * FROM t1;
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--error ER_LOCK_WAIT_TIMEOUT
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SET STATEMENT lock_wait_timeout=0 FOR INSERT INTO t1 values (2);
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--send INSERT INTO t1 values (2,0);
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connection con2;
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--reap # BLOCK_DDL
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backup stage end;
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connection con1;
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--reap # ALTER TABLE
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connection default;
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--reap # INSERT
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select * from t1;
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drop table t1;
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--echo # Test with inline alter table, which doesn't block block_commit
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create table t1 (a int) engine=innodb;
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start transaction;
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# Acquires MDL lock
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insert into t1 values (1);
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connection con1;
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# Waits on MDL
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--send alter table t1 add column (j int)
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connection con2;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table metadata lock";
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--source include/wait_condition.inc
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backup stage start;
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backup stage flush;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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backup stage block_ddl;
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backup stage block_commit;
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connection default;
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SELECT * FROM t1;
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--send commit
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connection con2;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for backup lock";
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backup stage end;
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connection con1;
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--reap # ALTER TABLE
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connection default;
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--reap # commit
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drop table t1;
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--echo #
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--echo # testing if BACKUP STAGE FLUSH causes deadlocks with DROP TABLE
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--echo #
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create table t1 (a int) engine=innodb;
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start transaction;
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# Acquires MDL lock
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insert into t1 values (1);
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connection con1;
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# Waits on MDL
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--error ER_LOCK_WAIT_TIMEOUT
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SET STATEMENT lock_wait_timeout=0 FOR DROP TABLE t1;
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--send DROP TABLE t1
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connection con2;
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backup stage start;
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backup stage flush;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table metadata lock";
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--source include/wait_condition.inc
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--error ER_LOCK_WAIT_TIMEOUT
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SET STATEMENT lock_wait_timeout=0 FOR SELECT * FROM t1;
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--error ER_LOCK_WAIT_TIMEOUT
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SET STATEMENT lock_wait_timeout=0 FOR backup stage block_ddl;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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backup stage end;
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connection default;
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commit;
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connection con1;
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--reap # DROP TABLE
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connection default;
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--echo #
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--echo # Check if backup stage block_dll + concurrent drop table blocks select
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--echo #
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create table t1 (a int) engine=innodb;
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backup stage start;
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backup stage block_ddl;
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connection con1;
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--send DROP TABLE t1
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connection con2;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for backup lock";
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--source include/wait_condition.inc
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connection con2;
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SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
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# Check that select's are not blocked
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SELECT * FROM t1;
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connection default;
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backup stage end;
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connection con1;
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--reap
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connection default;
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--echo #
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--echo # Check if backup stage block_dll overrides ddl lock for drop table
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--echo #
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create table t1 (a int) engine=innodb;
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start transaction;
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# Acquires MDL lock
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insert into t1 values (1);
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connection con1;
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# Waits on MDL
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--error ER_LOCK_WAIT_TIMEOUT
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SET STATEMENT lock_wait_timeout=0 FOR DROP TABLE t1;
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--send DROP TABLE t1
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connection con2;
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backup stage start;
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backup stage flush;
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--send backup stage block_ddl
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connection default;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for backup lock";
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--source include/wait_condition.inc
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commit;
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connection con2;
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--reap
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backup stage end;
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connection con1;
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--reap # DROP TABLE
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connection default;
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--echo #
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--echo # Check if BACKUP STAGE BLOCK_COMMIT blocks commit
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--echo #
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create table t1 (a int) engine=innodb;
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start transaction;
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# Acquires MDL lock
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insert into t1 values (1);
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connection con1;
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backup stage start;
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backup stage block_commit;
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connection default;
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--send commit
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connection con1;
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for backup lock";
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backup stage end;
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connection default;
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--reap # commit
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select * from t1;
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drop table t1;
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#
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# End of tests using con1 and con2
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#
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disconnect con1;
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disconnect con2;
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--echo #
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--echo # Test backup stage and flush tables
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--echo #
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BACKUP STAGE START ;
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BACKUP STAGE BLOCK_DDL ;
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FLUSH TABLES;
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CREATE TEMPORARY TABLE t12345678_tmp (col1 INT);
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drop table t12345678_tmp;
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BACKUP STAGE END;
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--echo #
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--echo # Test BACKUP STAGES with lock timeouts
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--echo #
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SET GLOBAL lock_wait_timeout=0;
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CREATE TABLE t_permanent_innodb (col1 INT) ENGINE = InnoDB;
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CREATE TABLE t_permanent_myisam (col1 INT) ENGINE = MyISAM;
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INSERT INTO t_permanent_innodb SET col1 = 1;
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INSERT INTO t_permanent_myisam SET col1 = 1;
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CREATE TABLE t_con1_innodb (col1 INT) ENGINE = InnoDB;
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CREATE TABLE t_con1_myisam (col1 INT) ENGINE = MyISAM;
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--connect(con1,localhost,root,,)
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SET AUTOCOMMIT = 0;
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--connection default
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BACKUP STAGE START;
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BACKUP STAGE FLUSH;
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BACKUP STAGE BLOCK_DDL;
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BACKUP STAGE BLOCK_COMMIT;
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--connection con1
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UPDATE t_permanent_innodb SET col1 = 8;
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--error ER_LOCK_WAIT_TIMEOUT
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UPDATE t_permanent_myisam SET col1 = 8;
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--error ER_LOCK_WAIT_TIMEOUT
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DROP TABLE t_con1_innodb;
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--error ER_LOCK_WAIT_TIMEOUT
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DROP TABLE t_con1_myisam;
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--connection default
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BACKUP STAGE END;
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DROP TABLE t_permanent_myisam, t_permanent_innodb;
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DROP TABLE t_con1_innodb, t_con1_myisam;
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--disconnect con1
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set global lock_wait_timeout=default;
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