NAME
db.connect - Prints/sets general DB connection for current mapset.
KEYWORDS
database,
attribute table,
connection settings
SYNOPSIS
db.connect
db.connect --help
db.connect [-pgcd] [driver=name] [database=name] [schema=name] [group=string] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -p
- Print current connection parameters and exit
- Substitute variables in database settings
- -g
- Print current connection parameters using shell style and exit
- -c
- Check connection parameters, set if uninitialized, and exit
- -d
- Set from default settings and exit
- Overwrite current settings if already initialized
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- driver=name
- Name of database driver
- Options: dbf, odbc, ogr, pg, sqlite
- Default: sqlite
- database=name
- Name of database
- Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db
- schema=name
- Database schema
- Do not use this option if schemas are not supported by driver/database server
- group=string
- Default group of database users to which select privilege is granted
db.connect allows the user to set database connection parameters.
These parameters are then taken as default values by modules so that the
user does not need to enter the parameters each time.
The default database backend in GRASS GIS
is SQLite (since version 7).
Values are stored in the mapset's
VAR
file;
the connection is not tested for validity.
The -p flag will display the current connection parameters.
The -c flag will silently check if the connection parameters have
been set, and if not will set them to use GRASS's default values.
(useful in scripts before you attempt to create a new database table)
To connect a vector map to a database table,
use v.db.connect or
v.db.addtable.
Local storage:
db.connect -d
db.connect -p
db.tables -p
The SQLite database file is created automatically when used the first time.
See SQLite database driver for details.
Local storage, database tables stored in database "mydb"
(may require the use of
db.login):
db.connect driver=pg database=mydb
db.login user=myname pass=secret
db.connect -p
db.tables -p
See PostgreSQL database driver for details.
Network storage, database tables stored in database "mydb"
(may require the use of
db.login):
db.connect driver=pg database=mydb
db.login user=myname pass=secret host=myserver.com port=6666
db.connect -p
db.tables -p
See PostgreSQL database driver for details.
Local storage, database tables stored in database "mydb" (may require
the use of
db.login):
db.connect driver=mysql database=mydb
db.login user=myname pass=secret
db.connect -p
db.tables -p
See MySQL database driver for details.
Network storage, database tables stored in database "mydb"
(may require the use of
db.login):
db.connect driver=mysql database=mydb
db.login user=myname pass=secret host=myserver.com
db.connect -p
db.tables -p
See MySQL database driver for details.
Network storage, database tables stored in database "mydb"
(may require the use of
db.login):
db.connect driver=odbc database=mydb
db.login user=myname pass=secret
db.connect -p
db.tables -p
See ODBC database driver for details.
Local storage (the dbf/ subdirectory in the mapset must exist or must be
created by the user):
db.connect driver=dbf database='$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/'
db.tables -p
See DBF database driver for details.
db.columns,
db.copy,
db.drivers,
db.login,
db.tables,
v.db.addtable,
v.db.connect
GRASS SQL interface
Main author: Radim Blazek, ITC-Irst, Trento, Italy
GRASS 7 improvements: Martin Landa, Markus Metz
SOURCE CODE
Available at:
db.connect source code
(history)
Latest change: Tuesday Dec 17 20:17:20 2024 in commit: d962e90c026708a4815ea2b9f46c0e84c17de22d
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© 2003-2024
GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual