Details
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Bug
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Status: Stalled (View Workflow)
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Major
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Resolution: Unresolved
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5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL), 10.5
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None
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None
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Ubuntu 19.04
Description
Hi everyone,
On the latest trunk version (0308de9), I could observe a bug, as demonstrated by the following test case:
CREATE TABLE t0(c0 INT);
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INSERT INTO t0 VALUES (1);
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SELECT (c0 > (NULL <=> 0)) IS NULL FROM t0; -- expected: 0, actual: 1
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The expression seems to work correctly when it is used in a WHERE condition:
SELECT * FROM t0 WHERE (c0 > (NULL <=> 0)) IS NULL; -- no row is fetched
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Attachments
Issue Links
- relates to
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MDEV-21034 GREATEST() and LEAST() malfunction for NULL
- Closed
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MDEV-21065 UNIQUE constraint causes a query with string comparison to omit a row in the result set
- Closed
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MDEV-34004 Unexpected result when using equal operator <=>
- Open