[postgis-tickets] [PostGIS] #2487: Support invalid keys in GiST index

[PostGIS]

#2487: Support invalid keys in GiST index
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 Reporter:  pramsey  |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  high     |   Milestone:  PostGIS 2.0.5
Component:  postgis  |     Version:  2.0.x        
 Keywords:           |  
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 For various input geometries (ones with NaN coordinates, EMPTY ones) there
 is no reasonable box2df that can be created to represent it within the
 index. We need to return a key, or an error, and we can't error
 particularly on valid things like EMPTY. So we need a key which means
 "just ignore me". Probably (NaN, Nan, Nan, Nan). Or, really, any box2df
 with xmin==NaN.

 Then 2d ops and 3d ops need to be fixed up to understand it. And probably
 also Inf geometries need to be either supported (in all their Inf glory)
 or considered invalid as well.

 This is legitimately a bug, though probably an under-exercised one, since
 people don't use invalid/empty geometries very much. It should be fixed
 all the way back into the 2.0 branch.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2487>
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