[postgis-devel] [PostGIS] #1319: [raster] Make raster_columns a constraint-based view, replace AddRasterColumn with ApplyRasterConstraints and expand # of constraints on raster columns

[PostGIS]

#1319: [raster] Make raster_columns a constraint-based view, replace
AddRasterColumn with ApplyRasterConstraints and expand # of constraints on
raster columns
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 Reporter:  robe            |       Owner:  dustymugs    
     Type:  task            |      Status:  assigned     
 Priority:  critical        |   Milestone:  PostGIS 2.0.0
Component:  postgis raster  |     Version:  trunk        
 Keywords:                  |  
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Comment(by pracine):

 Replying to [comment:26 mloskot]:
 > Replying to [comment:22 dustymugs]:
 > > I believe the column "regular_blocking" should be renamed to
 "same_alignment"
 > > as it is an analog to ST_SameAlignment.
 >
 > AFAICT from the current docs on ST_SameAlignment, the regular_blocking
 is not the same concept.
 >
 > The regular_blocking flag indicates if tiles in a table/coverage form a
 regular rectangular grid, or not.

 samealignment is necessary but not sufficient. Regularlyblocked also needs
 samewidth, sameheight, hasnogaps and hasnooverlaps. I am pretty confident
 that those 5 condition makes regular blocking. See Objective FV.20 in the
 specs.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1319#comment:28>
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