[postgis-devel] [PostGIS] #1048: [raster] Coverage version of stats functions should be aggregates

[PostGIS]

#1048: [raster] Coverage version of stats functions should be aggregates
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 Reporter:  pracine         |       Owner:  pracine      
     Type:  enhancement     |      Status:  new          
 Priority:  medium          |   Milestone:  PostGIS 2.0.0
Component:  postgis raster  |     Version:  trunk        
 Keywords:                  |  
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Comment(by dustymugs):

 I don't think aggregate functions can return a multi-column result.  By
 the looks of PostgreSQL's aggregate functions, they all return simple
 values except array_agg which is an array of values.

 In addition, how would an aggregate function work for something like
 ST_ValueCount where there are two columns, the first being the value and
 the second being the count?

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1048#comment:1>
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