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  1. MariaDB Server
  2. MDEV-3480

LP:736358 - Unexpected increased timestamp resolution with UNION

        Details

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

          Description

          When executed in a UNION context, datetime operations return a millisecond precision, even though no fractional seconds were used anywhere in the expression.

          Test case:

          CREATE TABLE t1 (f1 timestamp(6));
          INSERT INTO t1 VALUES ('2002-07-15 21:00:00');

          SELECT TIME(f1) FROM t1;

          returns:

          21:00:00

          ( SELECT TIME(f1) FROM t1) UNION ALL ( SELECT TIME(f1) FROM t1);

          returns
          21:00:00.000000
          21:00:00.000000

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                philipstoev Philip Stoev added a comment -

                Re: Unexpected increased timestamp resolution with UNION
                Same applies for DISTINCT

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                philipstoev Philip Stoev added a comment - Re: Unexpected increased timestamp resolution with UNION Same applies for DISTINCT
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                ratzpo Rasmus Johansson added a comment -

                Launchpad bug id: 736358

                Show
                ratzpo Rasmus Johansson added a comment - Launchpad bug id: 736358

                  People

                  • Assignee:
                    serg Sergei Golubchik
                    Reporter:
                    philipstoev Philip Stoev
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                    Dates

                    • Created:
                      Updated:
                      Resolved: