Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
v.db.addtable will only insert category values into the table for those features which actually have a category value in the relevant layer. The user can add category values automatically by using v.category or manually with wxGUI vector digitizer before running v.db.addtable. Or one can run v.db.addtable first and then use either a combinatino of v.category + v.to.db or wxGUI vector digitizer to add the relevant lines to the table.
The supported types of columns depend on the database backend. However, all backends should support VARCHAR, INT, DOUBLE PRECISION and DATE.
The existing database connection(s) can be verified with v.db.connect.
g.copy vect=roadsmajor,myroads v.db.addtable myroads columns="slope double precision" v.db.connect -p myroads v.info -c myroads
Adding a new attribute table with two columns to layer 2:
g.copy vect=roadsmajor,myroads v.db.addtable myroads columns="slope double precision, roadname varchar(15)" layer=2 v.db.connect -p myroads v.info -c myroads v.info -c myroads layer=2
Available at: v.db.addtable source code (history)
Latest change: Sat May 2 18:32:06 2020 in commit: 98b3695918016bf0277a68b436082fb3f2015ce8
Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
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