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mariadb/mysql-test/suite/wsrep/r/unique_key.result
2014-10-01 23:38:27 +02:00

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#
# MDEV#5552 Deadlock when inserting NULL column value in column with
# UNIQUE index
#
USE test;
# On 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;
c1
NULL
NULL
# On node_2
SELECT * FROM test.t1;
c1
NULL
NULL
# On node_1
INSERT INTO t1 VALUES (1);
UPDATE t1 SET c1=NULL WHERE c1=1;
SELECT * FROM test.t1;
c1
NULL
NULL
NULL
# On node_2
SELECT * FROM test.t1;
c1
NULL
NULL
NULL
# On node_1
DELETE FROM t1 WHERE c1<=>NULL;
SELECT * FROM test.t1;
c1
# On node_2
SELECT * FROM test.t1;
c1
DROP TABLE t1;
# End of test