[GRASS-dev] [GRASS GIS] #2641: Copy cat value to a new layer does not work

[GRASS GIS]

#2641: Copy cat value to a new layer does not work
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 Reporter:  pvanbosgeo   |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  7.0.1                    
Component:  Default      |     Version:  unspecified              
 Keywords:               |    Platform:  Unspecified              
      Cpu:  Unspecified  |  
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 I have a vector map with layer=1 linked to attribute table and layer=2
 providing the number of overlapping categories. Aim is to create a third
 layer with unique values for each feature/polygon. The third step below,
 uploading the cat values from layer 2 to layer 3 doesn't work.

 # Add layer 3 to the vector layer test

 # add attribute table
 v.category test op=add layer=3 type=centroid out=test2
 v.db.addtable test2 layer=3 column="cat2 integer"

 # Upload cat from layer 2 to layer 3
 v.to.db test2 layer=3 query_layer=2 op=cat columns=cat2

 Error message:

 ...
 WARNING: Record (cat 75456) already exists (not inserted)
 WARNING: Record (cat 75457) already exists (not inserted)
 WARNING: Record (cat 75458) already exists (not inserted)
 WARNING: Record (cat 75459) already exists (not inserted)
 WARNING: Record (cat 75460) already exists (not inserted)
  100%
 75460 categories read from vector map (layer 3)
 75460 records selected from table (layer 2)
 75460 categories read from vector map exist in selection from table
 0 records updated/inserted (layer 3)

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2641>
GRASS GIS <http://grass.osgeo.org>