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  1. MariaDB Server
  2. MDEV-15363

Wrong result for CAST(LAST_DAY(TIME'00:00:00') AS TIME)

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.2, 10.3, 10.1, 10.0
    • Fix Version/s: 10.3.5
    • Component/s: Temporal Types
    • Labels:
      None

      Description

      SELECT
      		 
        LAST_DAY(TIME'00:00:00') AS c1,
      		 
        CAST(CAST(LAST_DAY(TIME'00:00:00') AS DATE) AS TIME) AS c2,
      		 
        CAST(LAST_DAY(TIME'00:00:00') AS TIME) AS c3;


      +------------+----------+------+
      		 
      | c1         | c2       | c3   |
      		 
      +------------+----------+------+
      		 
      | 2018-02-28 | 00:00:00 | NULL |
      		 
      +------------+----------+------+

      Notice, LAST_DAY(TIME'00:00:00') correctly returns the last day of the current month.
      If I now cast this expression as DATE, and then cast as TIME again (like in c2), it correctly returns 00:00:00.
      But if I cast this expression directly to TIME (like in c3), it erroneously returns NULL.

      It should return 00:00:00 in the column c3.

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          blocks

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-4912 Data type plugin API version 1

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          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
          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MDEV-15340 Wrong result HOUR(case_expression_with_time_and_datetime)

          • Major - Major loss of function.
          • Closed

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Created:
                Updated:
                Resolved:

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