Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-6983

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

    XMLWordPrintable

Details

    • Bug
    • Status: Open (View Workflow)
    • Minor
    • Resolution: Unresolved
    • 10.0.14, 10.10.1, 10.4, 10.5, 10.6, 10.7, 10.8, 10.9, 10.10
    • 10.4
    • None
    • None

    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.

      Attachments

        Issue Links

          Activity

            People

              bar Alexander Barkov
              bar Alexander Barkov
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

                Created:
                Updated:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.