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55 lines
787 B
Text
55 lines
787 B
Text
#
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# MDEV#5552 Deadlock when inserting NULL column value in column with
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# UNIQUE index
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#
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USE test;
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# On node_1
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connection node_1;
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CREATE TABLE t1(c1 INT DEFAULT NULL, UNIQUE KEY c1(c1)) ENGINE=INNODB;
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INSERT INTO t1 VALUES (NULL);
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INSERT INTO t1 VALUES (NULL);
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SELECT * FROM test.t1;
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c1
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NULL
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NULL
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# On node_2
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connection node_2;
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SELECT * FROM test.t1;
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c1
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NULL
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NULL
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# On node_1
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connection node_1;
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INSERT INTO t1 VALUES (1);
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UPDATE t1 SET c1=NULL WHERE c1=1;
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SELECT * FROM test.t1;
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c1
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NULL
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NULL
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NULL
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# On node_2
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connection node_2;
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SELECT * FROM test.t1;
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c1
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NULL
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NULL
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NULL
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# On node_1
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connection node_1;
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DELETE FROM t1 WHERE c1<=>NULL;
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SELECT * FROM test.t1;
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c1
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# On node_2
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connection node_2;
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SELECT * FROM test.t1;
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c1
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DROP TABLE t1;
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disconnect node_2;
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disconnect node_1;
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# End of test
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