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30 lines
955 B
Text
30 lines
955 B
Text
#
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# Bug#42580 - Innodb's ORDER BY ..LIMIT returns no rows for
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# null-safe operator <=> NULL
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#
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CREATE TABLE t1(
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c1 DATE NOT NULL,
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c2 DATE NULL,
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c3 DATETIME,
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c4 TIMESTAMP,
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PRIMARY KEY(c1),
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UNIQUE(c2)
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);
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INSERT INTO t1 VALUES('0000-00-00', '0000-00-00', '2008-01-04', '2008-01-05');
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INSERT INTO t1 VALUES('2007-05-25', '2007-05-25', '2007-05-26', '2007-05-26');
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INSERT INTO t1 VALUES('2008-01-01', NULL , '2008-01-02', '2008-01-03');
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INSERT INTO t1 VALUES('2008-01-17', NULL , NULL , '2009-01-29');
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INSERT INTO t1 VALUES('2009-01-29', '2009-01-29', '2009-01-29', '2009-01-29');
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SELECT * FROM t1 WHERE c2 <=> NULL ORDER BY c1,c2;
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c1 c2 c3 c4
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2008-01-01 NULL 2008-01-02 00:00:00 2008-01-03 00:00:00
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2008-01-17 NULL NULL 2009-01-29 00:00:00
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SELECT * FROM t1 WHERE c2 <=> NULL ORDER BY c1,c2 LIMIT 2;
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c1 c2 c3 c4
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2008-01-01 NULL 2008-01-02 00:00:00 2008-01-03 00:00:00
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2008-01-17 NULL NULL 2009-01-29 00:00:00
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DROP TABLE t1;
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