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  1. MariaDB Server
  2. MDEV-6983

BIGINT 99991231000000 to TIME'00:00:00' comparison is not consistent

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 10.0.14
    • Fix Version/s: 10.0
    • Component/s: None
    • Labels:
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      Description

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 (a BIGINT, b TIME);
      INSERT INTO t1 VALUES (99991231000000,'00:00:00');
      SELECT a, b, 99991231000000=TIME'00:00:00',a=TIME'00:00:00',99991231000000=b,a=b FROM t1;

      returns the following:

      +----------------+----------+-------------------------------+------------------+------------------+------+
      | a              | b        | 99991231000000=TIME'00:00:00' | a=TIME'00:00:00' | 99991231000000=b | a=b  |
      +----------------+----------+-------------------------------+------------------+------------------+------+
      | 99991231000000 | 00:00:00 |                             1 |                0 |                1 |    0 |
      +----------------+----------+-------------------------------+------------------+------------------+------+

      That is 999991231000000=TIME'00:00:00' is:

      • equal when both are literals
      • not equal with a numeric field and a TIME literal
      • equal with a numeric literal and a TIME field
      • not equal when both are fields

      This looks inconsistent, because in all cases it should be compared as TIME,
      according to the current comparison rules.

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated:

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