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+########################################################################
+# Tests for Implement LOCK FOR BACKUP (MDEV-5336)
+########################################################################
+# Check a non transactional table per ENGINE = Aria TRANSACTIONAL = 0.
+#
+
+--source include/not_embedded.inc
+# As non transactional engine we use Aria with TRANSACTIONAL = 0
+--source include/have_aria.inc
+
+# Following connections are used in a few of the following tests
+connect (con1,localhost,root,,);
+
+SET SESSION lock_wait_timeout = 1;
+
+--echo #-----------------------------------------------------------------------
+--echo # Single-threaded tests
+--echo #-----------------------------------------------------------------------
+
+--echo # Show the fate and impact of some SELECT /HANDLER ... READ
+--echo # sliding through the sequence.
+CREATE TABLE t_permanent_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+INSERT INTO t_permanent_aria SET col1 = 1;
+BACKUP STAGE START;
+SELECT COUNT(*) FROM t_permanent_aria;
+HANDLER t_permanent_aria OPEN;
+HANDLER t_permanent_aria READ FIRST;
+HANDLER t_permanent_aria CLOSE;
+BACKUP STAGE FLUSH;
+SELECT COUNT(*) FROM t_permanent_aria;
+HANDLER t_permanent_aria OPEN;
+HANDLER t_permanent_aria READ FIRST;
+HANDLER t_permanent_aria CLOSE;
+BACKUP STAGE BLOCK_DDL;
+SELECT COUNT(*) FROM t_permanent_aria;
+HANDLER t_permanent_aria OPEN;
+HANDLER t_permanent_aria READ FIRST;
+HANDLER t_permanent_aria CLOSE;
+BACKUP STAGE BLOCK_COMMIT;
+SELECT COUNT(*) FROM t_permanent_aria;
+HANDLER t_permanent_aria OPEN;
+HANDLER t_permanent_aria READ FIRST;
+HANDLER t_permanent_aria CLOSE;
+BACKUP STAGE END;
+
+--echo # In case the backup lock is taken by the current connection than
+--echo # - DML modifying some permanent table is not allowed
+BACKUP STAGE START;
+SET AUTOCOMMIT = 0;
+--error ER_BACKUP_LOCK_IS_ACTIVE
+INSERT INTO t_permanent_aria SET col1 = 1;
+SET AUTOCOMMIT = 1;
+--error ER_BACKUP_LOCK_IS_ACTIVE
+INSERT INTO t_permanent_aria SET col1 = 1;
+
+--echo # - DDL creating or renaming a permanent table or a procedure is not
+--echo # allowed.
+--echo # The latter tries to modify a permanent system table.
+
+--error ER_BACKUP_LOCK_IS_ACTIVE
+CREATE TABLE throw_away (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+--error ER_BACKUP_LOCK_IS_ACTIVE
+RENAME TABLE t_permanent_aria To throw_away;
+--echo # - DDL creating a temporary table is allowed.
+CREATE TEMPORARY TABLE t_temporary_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+--echo # - DML modifying that temporary table is allowed.
+INSERT INTO t_temporary_aria SET col1 = 1;
+SELECT COUNT(*) FROM t_temporary_aria;
+BACKUP STAGE END;
+
+--echo # Show the fate and impact of some auto committed INSERT into temporary
+--echo # table sliding through the sequence.
+SET AUTOCOMMIT = 1;
+BACKUP STAGE START;
+INSERT INTO t_temporary_aria SET col1 = 1;
+BACKUP STAGE FLUSH;
+INSERT INTO t_temporary_aria SET col1 = 1;
+BACKUP STAGE BLOCK_DDL;
+INSERT INTO t_temporary_aria SET col1 = 1;
+BACKUP STAGE BLOCK_COMMIT;
+INSERT INTO t_temporary_aria SET col1 = 1;
+BACKUP STAGE END;
+SELECT COUNT(*) FROM t_temporary_aria;
+
+--echo # Show the fate and impact of some DROP/CREATE TEMPORARY TABLE sliding
+--echo # through the sequence.
+
+SET AUTOCOMMIT = 1;
+BACKUP STAGE START;
+DROP TEMPORARY TABLE t_temporary_aria;
+CREATE TEMPORARY TABLE t_temporary_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+BACKUP STAGE FLUSH;
+DROP TEMPORARY TABLE t_temporary_aria;
+CREATE TEMPORARY TABLE t_temporary_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+BACKUP STAGE BLOCK_DDL;
+DROP TEMPORARY TABLE t_temporary_aria;
+CREATE TEMPORARY TABLE t_temporary_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+BACKUP STAGE BLOCK_COMMIT;
+DROP TEMPORARY TABLE t_temporary_aria;
+CREATE TEMPORARY TABLE t_temporary_aria (col1 INT) ENGINE = Aria TRANSACTIONAL = 0;
+BACKUP STAGE END;
+--echo # Show that even more DDL on the temporary table is allowed.
+BACKUP STAGE START;
+TRUNCATE t_temporary_aria;
+ALTER TABLE t_temporary_aria ADD COLUMN col2 INT;
+ALTER TABLE t_temporary_aria ADD KEY idx(col2);
+BACKUP STAGE END;
+
+DROP TABLE t_permanent_aria;
+
+--echo #-----------------------------------------------------------------------
+--echo # Show that non transactional tables locks with BACKUP STAGE FLUSH
+--echo #-----------------------------------------------------------------------
+
+set session lock_wait_timeout=default;
+create table t1 (a int) engine=aria transactional=0;
+insert into t1 values (1), (2);
+
+connection con1;
+backup stage start;
+backup stage flush;
+connection default;
+select * from t1;
+--error ER_LOCK_WAIT_TIMEOUT
+SET STATEMENT lock_wait_timeout=0 FOR INSERT INTO t1 values (3);
+--send INSERT INTO t1 values (4)
+connection con1;
+backup stage end;
+connection default;
+--reap # send
+select * from t1;
+drop table t1;
+
+--echo #-----------------------------------------------------------------------
+--echo # Show that transactional tables doesn't lock with BACKUP STAGE FLUSH
+--echo #-----------------------------------------------------------------------
+
+set session lock_wait_timeout=default;
+create table t1 (a int) engine=aria transactional=1 page_checksum=1;
+insert into t1 values (1), (2);
+
+connection con1;
+backup stage start;
+backup stage flush;
+connection default;
+INSERT INTO t1 values (4);
+connection con1;
+backup stage end;
+connection default;
+select * from t1;
+drop table t1;
+
+--echo #
+--echo # Cleanup
+--echo #
+
+disconnect con1;