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  1. MariaDB Server
  2. MDEV-15287

Bad result for LEAST/GREATEST(datetime_alike_string, time)

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL)
    • 10.3.5
    • Temporal Types
    • None

    Description

      This query returns bad results:

      SELECT
      		 
        GREATEST('2010-01-01 10:10:10',TIME('-20:20:20')),
      		 
        GREATEST('2010-01-01 10:10:10',TIME('20:20:20')),
      		 
        LEAST('2010-01-01 10:10:10',TIME('-20:20:20')),
      		 
        LEAST('2010-01-01 10:10:10',TIME('20:20:20'))\G


      GREATEST('2010-01-01 10:10:10',TIME('-20:20:20')): 802:10:10.000000
      		 
       GREATEST('2010-01-01 10:10:10',TIME('20:20:20')): 802:10:10.000000
      		 
         LEAST('2010-01-01 10:10:10',TIME('-20:20:20')): -20:20:20.000000
      		 
          LEAST('2010-01-01 10:10:10',TIME('20:20:20')): 20:20:20.000000

      Implicit conversion from the string literal '2010-01-01 10:10:10' to TIME does not seem to work well inside LEAST/GREATEST.

      The expected behavior would be to return results similar to this query (with explicit CAST added around the string):

      SELECT
      		 
        GREATEST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('-20:20:20')),
      		 
        GREATEST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('20:20:20')),
      		 
        LEAST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('-20:20:20')),
      		 
        LEAST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('20:20:20'))\G


      GREATEST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('-20:20:20')): 10:10:10.000000
      		 
       GREATEST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('20:20:20')): 20:20:20.000000
      		 
         LEAST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('-20:20:20')): -20:20:20.000000
      		 
          LEAST(CAST('2010-01-01 10:10:10' AS TIME(6)),TIME('20:20:20')): 10:10:10.000000

      Attachments

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. MDEV-8894 Inserting fractional seconds into MySQL 5.6 master breaks consistency on MariaDB 10 slave

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              bar Alexander Barkov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:
                Resolved:

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