[postgis-tickets] [PostGIS] #2822: Slow _add_raster_constraint_extent

[PostGIS]

#2822: Slow _add_raster_constraint_extent
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 Reporter:  strk    |       Owner:  dustymugs
     Type:  defect  |      Status:  new      
 Priority:  medium  |   Milestone:           
Component:  raster  |     Version:  2.1.x    
 Keywords:          |  
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 Calling _add_raster_constraint_extent takes ~24 seconds against a table
 containing 2048 rasters of 256x256 pixels and 3 bands each.

 For comparison, calling st_envelope(st_collect(st_envelope(rast))) takes
 1.5 seconds. There might be something unneeded being run by the function.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2822>
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