[GRASSLIST:4280] RE: measuring lines

[Craig Aumann]

Hi Mark!

The magic procedure to look at is v.to.db.  

Below, I create a new column in a PostgreSQL database linked via field
2, uploaded the number of records.  Check out option "length" for your
problem.  

v.db.connect -o map=play table=play_att key=LINK_KEY field=2 \
	driver=pg database="dbname=alpac_netdown,user=caumann"

v.db.connect -p play

echo "alter table play_att add column playcat integer" | db.execute
v.to.db map=play field=2 option=count col1=playcat

Cheers!
Craig