[GRASS-dev] no cats in map but adding table says 1 is there

[Maciej Sieczka]

Take a simple vector map - 3 points, each having an unique category:

$ v.info -t rndv
nodes=3
points=3
lines=0
boundaries=0
centroids=0
areas=0
islands=0
faces=0
kernels=0
primitives=3
map3d=0

$ v.category opt=print in=rndv
(no output, i.e. no categories)

Why does v.db.addtable say "1 categories read from map" when adding 
table to it?:

$ v.db.addtable rndv col='cat int, elev double'
Using vector map name as table name: rndv
Creating new DB connection based on default mapset settings...
Creating table with columns (cat integer, elev double)
The table <rndv> is now part of vector map <rndv> and may be deleted or 
overwritten by GRASS modules
Select privileges were granted on the table
Aktualizacja bazy danych...
  100%
1 categories read from map   <---   ???!
0 records updated/inserted
Current attribute table links:
Vector map <rndv at PERMANENT> is connected by:
layer <1> table <rndv> in database 
</home/grassdata/caves_utm33/PERMANENT/dbf/> through driver <dbf> with 
key <cat>

Since the vector map has no categories, I would expect "0 categories 
read from map"...

Maciek

-- 
Maciej Sieczka
www.sieczka.org