[postgis-devel] [PostGIS] #1014: GEOMETRY type is not "hashable"

[PostGIS]

#1014: GEOMETRY type is not "hashable"
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  Reporter:  vince    |       Owner:  pramsey            
      Type:  defect   |      Status:  closed             
  Priority:  medium   |   Milestone:  PostGIS 1.5.3      
 Component:  postgis  |     Version:  1.5.X              
Resolution:  wontfix  |    Keywords:  GEOMETRY hash UNION
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Comment(by chodgson):

 Wouldn't it be just as valid to hash based on the bounding box? That's
 down to only 4 zero-checks. Might not be as efficient for special cases
 handling gridded data or similar (but would still work), but would work
 fine in the general cases where you have no reason to expect any two
 random geometries to have the same bounding box.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1014#comment:8>
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