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  1. MariaDB Server
  2. MDEV-229

lp:985667 Wrong result with subquery in SELECT clause, and constant table in main query and implicit grouping

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: 5.5.23, 5.3.6
        • Fix Version/s: 5.5.24, 5.3.7
        • Component/s: None
        • Labels:
          None

          Description

          https://bugs.launchpad.net/maria/+bug/985667

          The following test case, extracted from the test for bug lp:680846 produces wrong result:

          CREATE TABLE t1 (f1 int) ;
INSERT INTO t1 VALUES (7),(8);

CREATE TABLE t2 (f2 int, f3 varchar(32)) ;
INSERT INTO t2 VALUES (1,'f');

SELECT COUNT(f2), (SELECT f1 FROM t1 WHERE t2.f2 limit 1) AS f4
FROM t2, t1
WHERE 'v'= t2.f3;

+-----------+------+
| COUNT(f2) | f4   |
+-----------+------+
|         0 |    7 |
+-----------+------+

          The correct result is:

          +-----------+------+
| COUNT(f2) | f4   |
+-----------+------+
|         0 | NULL |
+-----------+------+

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                  People

                  • Assignee:
                    timour Timour Katchaounov
                    Reporter:
                    sanja Oleksandr Byelkin
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