[postgis-devel] [PostGIS] #1078: ST_Difference with NULL as second argument

[PostGIS]

#1078: ST_Difference with NULL as second argument
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 Reporter:  nicklas  |       Owner:  nicklas      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.0.0
Component:  postgis  |     Version:  trunk        
 Keywords:           |  
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Comment(by pramsey):

 Take this to the devel list. It's ok for st_difference(geometry, empty).
 But NULL has special expectations in a database. See the difference
 between
 {{{
 select btrim('this', 't');
 select btrim('this', NULL);
 }}}
 for an analogue to your case.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1078#comment:1>
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