[postgis-devel] [PostGIS] #1828: Estimate returned by geography_gist_selectivity results in slow query plan for ST_DWithin

[PostGIS]

#1828: Estimate returned by geography_gist_selectivity results in slow query plan
for ST_DWithin
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  Reporter:  realityexists  |       Owner:  mcayland     
      Type:  defect         |      Status:  reopened     
  Priority:  medium         |   Milestone:  PostGIS 2.0.2
 Component:  postgis        |     Version:  2.0.x        
Resolution:                 |    Keywords:               
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Comment(by realityexists):

 OK, tested on r10731 on 32-bit Linux. It doesn't crash any more - good
 start! A simplified version of my original query is now twice as fast with
 the filtering function inlined compared to not inlined. The real, original
 query is still about 20% slower with inlining than without. That's a big
 improvement on before (when it didn't return at all), but I guess it's
 still largely a matter of luck.

 I can't compare the absolute times before and after, because my "main"
 Postgres installation (on Windows x64) is still at r10577. I'm holding off
 upgrading that until the "180/-180" issue in #2066 is fixed.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1828#comment:58>
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