[GRASS-user] Change the length and type of columns in an attribute table

Hello all,

I have a problem when I want to modify an attribute table.

I add a new vector with v.in.ogr. My attribute table is build like that :

name type length

cat integer 20
ID character 24
PREC_PLANI double precision 20
NATURE character 31
HAUTEUR integer 20
id_2 integer 20

I would like to remove the column 'HAUTEUR', but when I remove this
column, my two character columns (ID and NATURE) change automatically to
become :

ID text 1000
NATURE text 1000

Do you know why the simple fact to remove a column (HAUTEUR) change type
and length of other columns.

Thanks,

Camille Bezzina
Geophom