#
# Bug#38231 Innodb crash in lock_reset_all_on_table() on TRUNCATE + LOCK / UNLOCK
# http://bugs.mysql.com/38231
#

-- source include/have_innodb.inc

SET storage_engine=InnoDB;

# we care only that the following SQL commands do not crash the server
-- disable_query_log
-- disable_result_log

DROP TABLE IF EXISTS bug38231_1;
CREATE TABLE bug38231_1 (a INT);

-- connect (lock_gain,localhost,root,,)
-- connect (lock_wait1,localhost,root,,)
-- connect (lock_wait2,localhost,root,,)
-- connect (truncate_wait,localhost,root,,)

-- connection lock_gain
SET autocommit=0;
LOCK TABLE bug38231_1 WRITE;

-- connection lock_wait1
SET autocommit=0;
-- send
LOCK TABLE bug38231_1 WRITE;

-- connection lock_wait2
SET autocommit=0;
-- send
LOCK TABLE bug38231_1 WRITE;

-- connection truncate_wait
-- send
TRUNCATE TABLE bug38231_1;

-- connection lock_gain
# this crashes the server if the bug is present
UNLOCK TABLES;

# clean up

# do not clean up - we do not know which of the three has been released
# so the --reap command may hang because the executing command is still
# running/waiting
#-- connection lock_wait1
#-- reap
#UNLOCK TABLES;
#
#-- connection lock_wait2
#-- reap
#UNLOCK TABLES;
#
#-- connection truncate_wait
#-- reap

-- connection default

-- disconnect lock_gain
-- disconnect lock_wait1
-- disconnect lock_wait2
-- disconnect truncate_wait

DROP TABLE bug38231_1;

# test that TRUNCATE works with row-level locks

DROP TABLE IF EXISTS bug38231_2;
CREATE TABLE bug38231_2 (a INT);

-- enable_query_log
-- enable_result_log

INSERT INTO bug38231_2 VALUES (1), (10), (300);

-- connect (con4,localhost,root,,)

-- connection con4
SET autocommit=0;
SELECT * FROM bug38231_2 FOR UPDATE;

-- connection default
TRUNCATE TABLE bug38231_2;

-- connection con4
COMMIT;

-- connection default

-- disconnect con4

DROP TABLE bug38231_2;