[postgis-devel] [PostGIS] #457: ST_CollectionExtract returns non-requested type

[PostGIS]

#457: ST_CollectionExtract returns non-requested type
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 Reporter:  strk     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 1.5.2
Component:  postgis  |     Version:  trunk        
 Keywords:           |  
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Comment(by nicklas):

 I add a patch that should give the results expected in testcase.patch
 So it should return the asked for type even if it is not in a collection.

 But I have done nothing about the documentation.

 If we go this way the function name is a little misleading. It maybe
 should have been something like ST_TypeExtract instead. But that is
 nothing for a minor release and I guess that is no big deal.

 Or should we give an error message instead if function is feed with else
 than collection.

 Or maybe, always return an empty collection when inputed geometry is not
 collection with a notice?

 But it might be quite useful to just get everything of the asked for type
 even if it is no collection.

 /Nicklas

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/457#comment:4>
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