[postgis-devel] [PostGIS] #835: ST_CollectionExtract returns EMPTY or NULL inconsistently

PostGIS trac at osgeo.org
Thu Feb 17 01:50:05 PST 2011

#835: ST_CollectionExtract returns EMPTY or NULL inconsistently
 Reporter:  strk     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.0.0
Component:  postgis  |     Version:  trunk        
 Keywords:           |  

Comment(by mcayland):

 Intuitively that sounds like a better behaviour but I'd wait for more
 votes on this. Note that we had this whole discussion several months ago,
 and hence documented the behaviour on the developer wiki here:
 http://trac.osgeo.org/postgis/wiki/DevWikiEmptyGeometry. I'd go through
 the similar cases there to get a feel for what the correct behaviour
 should be.

Ticket URL: <http://trac.osgeo.org/postgis/ticket/835#comment:1>
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