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  1. MariaDB Server
  2. MDEV-2842

LP:938518 - HAVING does not reject the result of aggregation

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: None
        • Fix Version/s: None
        • Component/s: None
        • Labels:

          Description

          Using mariadb-5.2 create and populate table 1 with the following commands:

          CREATE TABLE t1 (pk INT PRIMARY KEY, a INT);
          INSERT INTO t1 VALUES (2,7), (4,7), (6,2), (17,0);

          Execute the following queries:
          SELECT MIN(t.pk) FROM t1, t1 as t WHERE t1.pk = 1;
          SELECT MIN(t.pk) FROM t1, t1 as t WHERE t1.pk = 1 HAVING MIN(t.pk) < 10;

          The first query return the right result while the second query returns a wrong result:

          MariaDB [test]> SELECT MIN(t.pk) FROM t1, t1 as t WHERE t1.pk = 1;
          -----------

          MIN(t.pk)

          -----------

          NULL

          -----------

          MariaDB [test]> SELECT MIN(t.pk) FROM t1, t1 as t WHERE t1.pk = 1 HAVING MIN(t.pk) < 10;
          -----------

          MIN(t.pk)

          -----------

          NULL

          -----------

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                ratzpo Rasmus Johansson added a comment -

                Launchpad bug id: 938518

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                ratzpo Rasmus Johansson added a comment - Launchpad bug id: 938518

                  People

                  • Assignee:
                    sanja Oleksandr Byelkin
                    Reporter:
                    igor Igor Babaev
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                    • Created:
                      Updated:
                      Resolved: