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  1. MariaDB Server
  2. MDEV-7529

GIS: ST_Relate returns unexpected results for POINT relations

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: N/A
    • Fix Version/s: 10.1.4
    • Component/s: GIS
    • Labels:

      Description

      Two identical points

      ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(0 0)')

      Equals (T*F**FFF*)

      MariaDB

      MariaDB [test]> select ST_Relate(ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(0 0)'),'T*F**FFF*') AS equals;
      +--------+
      | equals |
      +--------+
      |      0 |
      +--------+
      1 row in set (0.00 sec)

      PostGIS

      pgis=# select ST_Relate(ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(0 0)'),'T*F**FFF*') AS equals;
       equals 
      --------
       t
      (1 row)

      Same for Contains (T*****FF*), Covers (T*****FF*), Within (T*F**F***), Covered by (T*F**F***).

      Two different points

      ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(1 1)')

      Disjoint

      MariaDB

      MariaDB [test]> select ST_Relate(ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(1 1)'),'FF*FF****') as disjoint;
      +----------+
      | disjoint |
      +----------+
      |        0 |
      +----------+
      1 row in set (0.00 sec)

      PostGIS

      pgis=# select ST_Relate(ST_PointFromText('POINT(0 0)'),ST_PointFromText('POINT(1 1)'),'FF*FF****') as disjoint;
       disjoint 
      ----------
       t
      (1 row)

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              • Assignee:
                holyfoot Alexey Botchkov
                Reporter:
                elenst Elena Stepanova
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                Dates

                • Created:
                  Updated:
                  Resolved: