[GRASS-user] tables connection in database

[achim]

Thats exactly the problem: It shows nothing.
None of my lines has any cat.

Achim

Moritz Lennert wrote:
> 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