polardbxengine/mysql-test/t/lock_backup.test

--echo #
--echo # WL#9451 -- Backup Log
--echo #

CREATE TABLE t1 (a INT);

--enable_connect_log

--connect (con1, localhost, root,,)
SET lock_wait_timeout= 1;
SET autocommit= 0;

--connection default
LOCK INSTANCE FOR BACKUP;

--connection con1

let $con1_id= `SELECT CONNECTION_ID()`;

--echo # Test case 1: Check that attempt to run DDL statement leads to
--echo # emission of error ER_LOCK_WAIT_TIMEOUT since execution
--echo # of the statement was blocked by LOCK INSTANCE issued
--echo # from connection default.

--error ER_LOCK_WAIT_TIMEOUT
CREATE TABLE t2 (a INT);

--echo # Test case 2: Check that DML statement is executed successfully
--echo # when LOCK INSTANCE was acquired from another connection.
INSERT INTO t1 VALUES (100);
COMMIT;
SELECT * FROM t1;

--echo # Test case 3: Make attempt to execute a DDL statement after LOCK INSTANCE was issued
--echo # and check that DDL is executed successfully as soon as UNLOCK INSTANCE was issued
SET lock_wait_timeout= 10000000;
--send CREATE TABLE t3 (a INT)

--connection default
let $wait_condition=
  SELECT count(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST
  WHERE state = "Waiting for backup lock" AND id = $con1_id;
--source include/wait_condition.inc

UNLOCK INSTANCE;

--connection con1
--echo # Reap result of CREATE TABLE t3
--reap
--echo # Check that the table t3 was created
DESCRIBE t3;

--echo # Test case 4: Check that several statements LOCK INSTANCE FOR BACKUP
--echo # can be issued from different connections.

LOCK INSTANCE FOR BACKUP;

--connect (con2, localhost, root,,)
--echo # It is expected that second execution of LOCK INSTANCE FOR BACKUP
--echo # will be successful.
LOCK INSTANCE FOR BACKUP;

--echo # Then switch to the connection default
--echo # and try to execute the statement CREATE TABLE t2.
--echo # It is expected that processing of the statement will be suspended
--echo # until connections con1 and con2 release Backup Lock.
--connection default

let $default_con_id= `SELECT CONNECTION_ID()`;
--send CREATE TABLE t2 (a INT)

--connection con1

let $wait_condition=
  SELECT count(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST
  WHERE state = 'Waiting for backup lock' AND id = $default_con_id;
--source include/wait_condition.inc

--echo # Show that default connection is waiting until Backup Lock be released
--replace_result $default_con_id default_con_id
--eval SELECT info, state FROM INFORMATION_SCHEMA.PROCESSLIST WHERE id = $default_con_id
UNLOCK INSTANCE;

--connection con2
--echo # Show that default connection is still waiting until Backup Lock be released
--echo # by connection con2
--replace_result $default_con_id default_con_id
--eval SELECT info, state FROM INFORMATION_SCHEMA.PROCESSLIST WHERE id = $default_con_id
UNLOCK INSTANCE;

--echo # Waiting until connection default acquire Backup Lock and resume execution
let $wait_condition=
  SELECT count(*) = 0 FROM INFORMATION_SCHEMA.PROCESSLIST
  WHERE state = 'Waiting for backup lock' AND id = $default_con_id;
--source include/wait_condition.inc

--connection default

--echo # Reap CREAT TABLE t2
--reap
--echo # Check that the table t2 was created after Backup Lock had been released
DESCRIBE t2;

--echo # Test case 5: Check that Backup Lock independent from
--echo # FLUSH TABLES <table list> WITH READ LOCK

--echo # Case 5.1: Check that FLUSH TABLES <table list> WITH READ LOCK following with
--echo # LOCK INSTANCE FOR BACKUP are executed successfully.
FLUSH TABLES t1 WITH READ LOCK;
LOCK INSTANCE FOR BACKUP;
UNLOCK INSTANCE;
UNLOCK TABLES;

--echo # Case 5.2: Check that LOCK INSTANCE FOR BACKUP following with
--echo # FLUSH TABLES <table list> WITH READ LOCK are executed successfully.
LOCK INSTANCE FOR BACKUP;
FLUSH TABLES t1 WITH READ LOCK;
UNLOCK TABLES;
UNLOCK INSTANCE;

--connection con1
--disconnect con1
--source include/wait_until_disconnected.inc

--connection con2
--disconnect con2
--source include/wait_until_disconnected.inc

--connection default

--echo # Test case 6: check that a user without granted BACKUP_ADMIN privilege
--echo # failed to acquire Backup Lock.
CREATE USER u1;
--connect (con1, localhost, u1,,)
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
LOCK INSTANCE FOR BACKUP;
--disconnect con1

--connection default
DROP USER u1;
DROP TABLE t1, t2, t3;

--echo #
--echo # Bug26665851 - USING FLUSH TABLES WITH READ LOCK AND LOCK INSTANCE LEADS TO A CRASH
--echo #

LOCK INSTANCE FOR BACKUP;

CREATE TABLE t1 (a INT);

--echo # Without the patch the following statement leads to a crash for debug build
FLUSH TABLES WITH READ LOCK;

UNLOCK TABLES;

DROP TABLE t1;

UNLOCK INSTANCE;