[GRASS-user] tables connection in database

[Moritz Lennert]

On 26/06/09 16:38, achim wrote:
> Thats exactly the problem: It shows nothing.
> None of my lines has any cat.

Well, then you need to add them with 'v.category option=add'

;-)
Moritz

> 
> 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
>