[GRASS-user] tables connection in database

[Moritz Lennert]

On 26/06/09 15:24, achim wrote:
> Hi Moritz,
> 
> thanks for reply and this detailed explanation.
> 
> I try to report my problem with an example:
> reset to initial point
> 
> v.db.connect -d map=my_lines at achim
> db.droptable -f table=testtable
> 
> my_lines:
>  |   Type of Map:  vector (level: 2)
>  |
>  |   Number of points:       0               Number of areas:      0
>  |   Number of lines:        2326            Number of islands:    0
>  |   Number of boundaries:   0               Number of faces:      0
>  |   Number of centroids:    0               Number of kernels:    0
>  |   Map is 3D:              No
>  |   Number of dblinks:      0
> 
> Number of nodes: 2410
> 
> 
> (with grass65 wx-gui)
> v.db.addtable map=my_lines at achim table=testtable
> Using user specified table name: testtable
> Creating new DB connection based on default mapset settings...
> Creating table with columns (cat integer)
> The table <testtable> is now part of vector map <my_lines at achim> and may 
> be deleted or overwritten by GRASS modules
> Select privileges were granted on the table
> Reading features...
> Updating database...
> 0 categories read from vector map (layer 1)
> 0 records updated/inserted (layer 1)
> Current attribute table links:
> layer <1> table <testtable> in database </home/achim/grass/sqlite_db> 
> through driver <sqlite> with key <cat>
> Vector map <my_lines at achim> is connected by:
> 
> 
> ?here no records updated/inserted

Probably none of your lines have categories. What does v.category 
my_lines option=report show ?

Moritz