[postgis-devel] [PostGIS] #548: st_numgeometries(geom) returns NULL when geom is not multi

[PostGIS]

#548: st_numgeometries(geom) returns NULL when geom is not multi
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  Reporter:  giohappy  |       Owner:  pramsey      
      Type:  defect    |      Status:  closed       
  Priority:  medium    |   Milestone:  PostGIS 1.5.2
 Component:  postgis   |     Version:  1.5.X        
Resolution:  wontfix   |    Keywords:               
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Comment(by strk):

 IsMulti is kind of confusing. Is a single-element collection a "multi" ?
 And is an empty collection a "Multi" ?

 Maybe ST_IsCollection() would be clearer, whereas all the MULTI* types are
 subclasses
 of the GEOMETRYCOLLECTION (as per OGC SFS). Also, it might have the nice
 characteristic
 of being always true on the result of ST_Collect (to be verified).

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/548#comment:7>
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