backup_locks.test

########################################################################
# Tests BACKUP STAGE locking
########################################################################

--source include/have_innodb.inc
--source include/have_metadata_lock_info.inc
--source include/not_embedded.inc
--source include/no_view_protocol.inc

--echo #
--echo # Test lock taken
--echo #

BACKUP LOCK test.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP LOCK t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP UNLOCK;
BACKUP LOCK non_existing.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP UNLOCK;

--echo #
--echo # Test that backup lock protects against ddl
--echo #

connect (con1,localhost,root,,);

connection default;
create table t1 (a int) engine=innodb;
insert into t1 values (1);
backup lock t1;
select * from t1;
connection con1;
--send drop table t1
connection default;
let $wait_condition=
    select count(*) = 1 from information_schema.processlist
    where state = "Waiting for table metadata lock";
--source include/wait_condition.inc
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
--error ER_LOCK_DEADLOCK
select * from t1;
backup unlock;

--echo #
--echo # BACKUP LOCK and BACKUP UNLOCK are not allowed in procedures.
--echo #
delimiter |;
--error ER_SP_BADSTATEMENT
CREATE PROCEDURE p_BACKUP_LOCK()
BEGIN
  BACKUP LOCK;
END|
--error ER_SP_BADSTATEMENT
CREATE PROCEDURE p_BACKUP_UNLOCK()
BEGIN
  BACKUP UNLOCK;
END|
delimiter ;|

--echo #
--echo # BACKUP STAGE doesn't work when a BACKUP LOCK is active.
--echo #
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
--error ER_CANT_UPDATE_WITH_READLOCK
BACKUP STAGE START;
BACKUP UNLOCK;
DROP TABLE t1;

--echo #
--echo # FLUSH TABLES WITH READ LOCK is not allowed when BACKUP LOCK is active.
--echo #
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
FLUSH TABLES t1 WITH READ LOCK;
BACKUP UNLOCK;

BACKUP LOCK t1;
FLUSH TABLES WITH READ LOCK;
BACKUP UNLOCK;
UNLOCK TABLES;
DROP TABLE t1;

--echo #
--echo # MDEV-20945 BACKUP UNLOCK assertion failures.
--echo #

--echo # Scenario 1.
CREATE TABLE t1 (a INT);
BACKUP LOCK t1;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
FLUSH TABLE t1 WITH READ LOCK;
UNLOCK TABLES;
BACKUP UNLOCK;   # Shouldn't trigger an assertion.
DROP TABLE t1;

--echo # Scenario 2.
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (b INT);
LOCK TABLES t2 AS a2 WRITE;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
BACKUP LOCK t1;
UNLOCK TABLES;
INSERT INTO t1 VALUES(0);
--source include/restart_mysqld.inc
DROP TABLE t1;
DROP TABLE t2;

--echo # Scenario 3.
CREATE TEMPORARY TABLE t3 (c INT);
BACKUP LOCK t1;  # Table `t1` doesn't exist.
SET @@SESSION.profiling=ON;
--error ER_CANT_UPDATE_WITH_READLOCK
CREATE TABLE t1 (c INT);
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLES t3 AS a1 READ, t1 AS a3 READ, t3 AS a5 READ LOCAL;
UNLOCK TABLE;
--source include/restart_mysqld.inc

--echo # Scenario 4.
CREATE TABLE t (c INT);
BACKUP LOCK not_existing.t;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLES t WRITE;
UNLOCK TABLES;
--source include/restart_mysqld.inc
DROP TABLE t;

--echo # Scenario 5.
BACKUP LOCK t1;
--error ER_CANT_UPDATE_WITH_READLOCK
CREATE TABLE t2 (c1 TIME, c2 TIME, c3 DATE, KEY(c1, c2));
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLE t2 READ;
--source include/restart_mysqld.inc

--echo # Scenario 6.
BACKUP LOCK t;
--error ER_CANT_UPDATE_WITH_READLOCK
CREATE VIEW v AS SELECT 1;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLES v READ;
START TRANSACTION READ ONLY;
BACKUP LOCK t;
--source include/restart_mysqld.inc

--echo # Scenario 7.
SET SQL_MODE='';
SET STATEMENT max_statement_time=180 FOR BACKUP LOCK test.u;
--error ER_CANT_UPDATE_WITH_READLOCK
CREATE TABLE t (a INT) ENGINE=Aria;
CREATE TEMPORARY TABLE IF NOT EXISTS s (c INT) ENGINE=Aria;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLES s AS a READ LOCAL,t AS b WRITE;
--let $q= `SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE`
SET STATEMENT max_statement_time=180 FOR BACKUP LOCK test.u;
--source include/restart_mysqld.inc

--echo #

connection con1;
--reap
connection default;
disconnect con1;
show tables;

--echo #
--echo #  MDEV-22879 SIGSEGV (or hang) in free/my_free from
--echo # _ma_end_block_record (on optimized builds)
--echo #

SET STATEMENT max_statement_time=20 FOR BACKUP LOCK test.t1;
--error ER_CANT_UPDATE_WITH_READLOCK
CREATE TABLE IF NOT EXISTS t3 (c1 CHAR(1) BINARY,c2 SMALLINT(10),c3 NUMERIC(1,0), PRIMARY KEY(c1(1))) ENGINE=InnoDB;
BACKUP UNLOCK;

CREATE TABLE IF NOT EXISTS t3 (c1 CHAR(1) BINARY,c2 SMALLINT(10),c3 NUMERIC(1,0), PRIMARY KEY(c1(1))) ENGINE=InnoDB;
SET STATEMENT max_statement_time=20 FOR BACKUP LOCK test.t1;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
LOCK TABLES t3 AS a2 WRITE, t3 AS a1 READ LOCAL;
--error ER_CANT_UPDATE_WITH_READLOCK
DROP TABLE t3;
BACKUP UNLOCK;
DROP TABLE t3;

--echo #
--echo #  MDEV-28367: BACKUP LOCKS on table to be accessible to those
--echo #              with database LOCK TABLES privileges
--echo #

--source include/have_metadata_lock_info.inc
create database db1;
create table db1.t1(t int);
create user user1@localhost;
select user,host from mysql.user where user='user1';
--replace_result $MASTER_MYSOCK MASTER_SOCKET $MASTER_MYPORT MASTER_PORT
--error ER_DBACCESS_DENIED_ERROR
--connect (con1, localhost, user1, ,db1)

grant reload on *.* to user1@localhost;
# To access DB one need select privileges
grant select on db1.* to user1@localhost;
show grants for user1@localhost;
--connect (con1, localhost, user1, ,db1)

# This should work we have RELOAD privilege
BACKUP UNLOCK;
BACKUP LOCK db1.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;

# Add LOCK TABLES DB privileges (all privileges for BACKUP LOCK are there)
connection default;
disconnect con1;
grant lock tables on db1.* to user1@localhost;
show grants for user1@localhost;
--connect (con1, localhost, user1, ,db1)
# This should work we have RELOAD & LOCK privilege
BACKUP UNLOCK;
BACKUP LOCK db1.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;

# Remove reload privilege, leave only LOCK TABLES privilege
connection default;
disconnect con1;
revoke reload on *.* from user1@localhost;
show grants for user1@localhost;
--connect (con1, localhost, user1, ,db1)
# There is no reload priv needed for unlock and there is no mdl_backup_lock taken
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
BACKUP UNLOCK;
# BACKUP LOCK should work, since we have LOCK privilege
BACKUP LOCK db1.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
# This works since there was taken mdl_backup_lock before
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;

# Remove LOCK TABLES privilege
connection default;
disconnect con1;
revoke lock tables on db1.* from user1@localhost;
show grants for user1@localhost;
--connect (con1, localhost, user1, ,db1)
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
BACKUP LOCK db1.t1;
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
BACKUP UNLOCK;

connection default;
disconnect con1;

drop database db1;
drop user user1@localhost;

--echo #
--echo # End of MariaDB 10.4 tests
--echo #