db.dropcolumngrass - Online in the Cloud

PROGRAM:

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 [--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

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

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