[postgis-devel] [PostGIS] #547: ST_contains memory problem when used between polygon and mixed geometry

[PostGIS]

#547: ST_contains memory problem when used between polygon and mixed geometry
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 Reporter:  twain               |       Owner:  chodgson     
     Type:  defect              |      Status:  new          
 Priority:  high                |   Milestone:  PostGIS 1.5.3
Component:  postgis             |     Version:  1.5.X        
 Keywords:  ST_contains memory  |  
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Changes (by chodgson):

  * owner:  pramsey => chodgson


Comment:

 A quick test - ESRI's standard world shapefiles, tested running PIP on
 cities in countries, ~2500 cities and ~250 countries.

 {{{
 select st_intersects(co.the_geom, ci.the_geom) from country co, cities ci;
 }}}

 This takes 8 seconds with the rtree code in place. If I removed the rtree
 shortcut in the intersection function by replacing the "if (one is a point
 and the other is poly)" with "if(0)" - it takes 28 seconds. That is the
 second run timings and it doesn't get any different with more runs. This
 is enough of a difference that I think it is worth keeping both
 implementations around for now.

 So I think I'd like to do the "super-cache" struct to hold both the geos
 prepared_geom and the rtree index in fn_extra.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/547#comment:4>
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