[postgis-devel] [PostGIS] #1536: [raster] There should be an option for setting the nodata value in certain variants of ST_Intersection(raster, raster)

[PostGIS]

#1536: [raster] There should be an option for setting the nodata value in certain
variants of ST_Intersection(raster, raster)
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 Reporter:  pracine  |       Owner:  pracine      
     Type:  defect   |      Status:  assigned     
 Priority:  low      |   Milestone:  PostGIS 2.0.0
Component:  raster   |     Version:  trunk        
 Keywords:           |  
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Comment(by pracine):

 I redesigned the variants if I add a double precision[] nodataval
 parameter. I end up with: (= means this parameter has a default value. I
 shortened everything for ease of reading)

 -- raster/geometry[[BR]]
 rast, geom, reg[[BR]]
 rast, geom, nodata=, reg=[[BR]]
 rast, band, geom, reg[[BR]]
 rast, band, geom, nodata=, reg=

 -- raster/raster no band number[[BR]]
 ras1, rast2, return=, nodaval[]=, reg=[[BR]]
 ras1, rast2, return=, nodaval=, reg=[[BR]]
 ras1, rast2, nodaval[], reg= (opt)[[BR]]
 ras1, rast2, nodaval, reg= (opt)[[BR]]
 ras1, rast2, reg (opt)

 -- raster/raster with band number[[BR]]
 ras1, b1, rast2, b2, return=, nodaval[]=, reg=[[BR]]
 ras1, b1, rast2, b2, return=, nodaval=, reg=[[BR]]
 ras1, b1, rast2, b2, nodaval[], reg= (opt)[[BR]]
 ras1, b1, rast2, b2, nodaval, reg= (opt)[[BR]]
 ras1, b1, rast2, b2, reg (opt)

 Maybe we can simplify by removing the three last one (the opt ones) of the
 two last groups and force users to pass something or a casted NULL in one
 of the two first one?

 Could we, in the doc, when we have parameter accepting a single value or
 an array, like here the new nodataval parameter, not list the variants
 accepting an array and simply say in the doc "Every of those variant also
 accept an array of value"?

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1536#comment:26>
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