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  1. MariaDB Server
  2. MDEV-7529

GIS: ST_Relate returns unexpected results for POINT relations

Details

    • Bug
    • Status: Closed (View Workflow)
    • Critical
    • Resolution: Fixed
    • N/A
    • 10.1.4
    • GIS

    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)

      Attachments

        Issue Links

          relates to

          Task - A task that needs to be done. MDEV-7509 Testing for GIS extensions

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

          Activity

            People

              holyfoot Alexey Botchkov
              elenst Elena Stepanova
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              Dates

                Created:
                Updated:
                Resolved:

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