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  1. MariaDB Server
  2. MDEV-12665

Hybrid functions do not preserve geometry type

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.1, 10.2, 10.3
    • Fix Version/s: 10.3.1
    • Component/s: GIS
    • Labels:
      None

      Description

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 AS SELECT
        Point(0,0) AS p0,
        COALESCE(Point(0,0)) AS p1,
        CASE WHEN 0 THEN Point(0,0) ELSE Point(1,1) END AS p2;
      SHOW CREATE TABLE t1;
      

      returns

      +-------+--------------------------------------------------------------------------------------------------------------------------------------------------+
      | Table | Create Table                                                                                                                                     |
      +-------+--------------------------------------------------------------------------------------------------------------------------------------------------+
      | t1    | CREATE TABLE `t1` (
        `p0` point DEFAULT NULL,
        `p1` geometry DEFAULT NULL,
        `p2` geometry DEFAULT NULL
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      +-------+--------------------------------------------------------------------------------------------------------------------------------------------------+
      

      The expected behavior would be to the POINT data type for all three columns.

      The same problem is demonstrated with LEAST and GREATEST:

      DROP TABLE IF EXISTS t1;
      CREATE TABLE t1 AS SELECT
        LEAST(Point(0,0),Point(0,0)) AS p1;
      SHOW CREATE TABLE t1;
      

      +-------+-----------------------------------------------------------------------------------------+
      | Table | Create Table                                                                            |
      +-------+-----------------------------------------------------------------------------------------+
        `p1` geometry DEFAULT NULL
      | t1    | CREATE TABLE `t1` (
      ) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
      +-------+-----------------------------------------------------------------------------------------+
      

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              • Assignee:
                bar Alexander Barkov
                Reporter:
                bar Alexander Barkov
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                Dates

                • Created:
                  Updated:
                  Resolved: