--source include/galera_cluster.inc
--source include/have_innodb.inc

--echo #
--echo # MDEV#5552 Deadlock when inserting NULL column value in column with
--echo # UNIQUE index
--echo #

USE test;
--echo
--echo # On node_1
--connection node_1
CREATE TABLE t1(c1 INT DEFAULT NULL, UNIQUE KEY c1(c1)) ENGINE=INNODB;
INSERT INTO t1 VALUES (NULL);
INSERT INTO t1 VALUES (NULL);
SELECT * FROM test.t1;

--echo
--echo # On node_2
--connection node_2
SELECT * FROM test.t1;


--echo
--echo # On node_1
--connection node_1
INSERT INTO t1 VALUES (1);
UPDATE t1 SET c1=NULL WHERE c1=1;
SELECT * FROM test.t1;

--echo
--echo # On node_2
--connection node_2
SELECT * FROM test.t1;

--echo
--echo # On node_1
--connection node_1
DELETE FROM t1 WHERE c1<=>NULL;
SELECT * FROM test.t1;

--echo
--echo # On node_2
--connection node_2
SELECT * FROM test.t1;

--let $galera_diff_statement = SELECT * FROM t1
--source include/galera_diff.inc

# Cleanup
DROP TABLE t1;

--source include/galera_end.inc
--echo # End of test