[postgis-tickets] [PostGIS] #4127: ST_Dimension returns 0 for empty GeometryCollection

[PostGIS]

#4127: ST_Dimension returns 0 for empty GeometryCollection
-----------------------+---------------------------
  Reporter:  esparano  |      Owner:  pramsey
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 2.4.5
 Component:  postgis   |    Version:  2.4.x
Resolution:            |   Keywords:
-----------------------+---------------------------

Comment (by pramsey):

 The documentation seems to be out of date, as "null on empty" behaviour
 has been commented out...
 {{{
 postgis25=# select st_dimension('POINT EMPTY');
  st_dimension
 --------------
             0
 (1 row)

 postgis25=# select st_dimension('LINESTRING EMPTY');
  st_dimension
 --------------
             1
 (1 row)

 postgis25=# select st_dimension('POLYGON EMPTY');
  st_dimension
 --------------
             2
 (1 row)

 postgis25=# select st_dimension('GEOMETRYCOLLECTION EMPTY');
  st_dimension
 --------------
             0
 (1 row)
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4127#comment:1>
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