db.dropcolumn(1grass)

NAME

db.dropcolumn - Drops a column from selected attribute table.

KEYWORDS

database, attribute table

SYNOPSIS

db.dropcolumn
db.dropcolumn --help
db.dropcolumn [-f] table=name column=name [database=name] [driver=name] [--help] [--verbose] [--quiet] [--ui]

Flags:

-f: Force removal (required for actual deletion of files)

--help: Print usage summary

--verbose: Verbose module output

--quiet: Quiet module output

--ui: Force launching GUI dialog

Parameters:

table=name [required]: Name of attribute table

column=name [required]: Name of attribute column

database=name: Name of database

driver=name: Name of database driver
Options: dbf, odbc, ogr, sqlite, pg

DESCRIPTION

db.dropcolumn drops a column from an attribute table. If the -f force flag is not given then nothing is removed, instead a preview of the action to be taken is printed.

NOTES

db.dropcolumn is a front-end to db.execute to allow easier usage with a special workaround for the SQLite driver to support column drop also for SQLite tables.

EXAMPLE

Dropping a column (North Carolina sample dataset):

# work on own copy
g.copy vect=roadsmajor,myroads
db.describe -c myroads
# only shows what would happen:
db.dropcolumn myroads column=SHAPE_LEN
# actually drops the column
db.dropcolumn -f myroads column=SHAPE_LEN
db.describe -c myroads

AUTHOR

Markus Neteler

SOURCE CODE

Available at: db.dropcolumn source code (history)

Accessed: Monday Feb 24 17:51:43 2025