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  1. MariaDB Server
  2. MDEV-3586

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: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:

      Description

      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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            ratzpo Rasmus Johansson added a comment -

            Launchpad bug id: 985667

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            ratzpo Rasmus Johansson added a comment - Launchpad bug id: 985667

              People

              • Assignee:
                timour Timour Katchaounov
                Reporter:
                timour Timour Katchaounov
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                • Created:
                  Updated:
                  Resolved: