[postgis-devel] [PostGIS] #1281: [raster] ST_MapAlgebraFct for two rasters

[PostGIS]

#1281: [raster] ST_MapAlgebraFct for two rasters
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 Reporter:  dustymugs       |       Owner:  dustymugs    
     Type:  enhancement     |      Status:  assigned     
 Priority:  blocker         |   Milestone:  PostGIS 2.0.0
Component:  postgis raster  |     Version:  trunk        
 Keywords:                  |  
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Comment(by pracine):

 I guess performance will be comparable only if you PREPARE the query
 parsing the expression in ST_MapAlgebraExpr. I did some test with the one
 raster version (which was not PREPARING the query at the moment) and
 ST_MapAlgebraFct was 7 time ST_MapAlgebraExpr for the same expression.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1281#comment:2>
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