gutle wrote: > yes. i want to avoid using "g.copy + v.db.dropcol". > the problem is, I have too much unnecessery column after all Gis > operations. such as a_a_cat, a_b_cat and so on... I see. I guess it is not possible (currently?) to avoid using "v.db.dropcol" and/or "v.db.renamecol". Nikos