NAME
db.connect - Prints/sets general DB connection for current mapset and
exits.
KEYWORDS
database, attribute table
SYNOPSIS
db.connect
db.connect help
db.connect [-pc] [driver=name] [database=name] [schema=string]
[group=string] [--verbose] [--quiet]
Flags:
-p
Print current connection parameters and exit
-c
Check connection parameters, set if uninitialized, and exit
--verbose
Verbose module output
--quiet
Quiet module output
Parameters:
driver=name
Driver name
Options: dbf,odbc,pg,mysql,sqlite,ogr
Default: dbf
database=name
Database name
Default: $GISDBASE/$LOCATION_NAME/$MAPSET/dbf/
schema=string
Database schema
Do not use this option if schemas are not supported by
driver/database server
group=string
Default group of database users to which select privilege is
granted
DESCRIPTION
db.connect allows the user to set database connection parameters.
These parameters are then taken as default values by modules so that
the user does not need to enter the parameters each time.
NOTES
Values are stored in the mapset’s VAR file; the connection is not
tested for validity.
The -p flag will display the current connection parameters.
The -c flag will silently check if the connection parameters have been
set, and if not will set them to use GRASS’s default values. (useful
in scripts before you attempt to create a new database table)
To connect a vector map to a database table, use v.db.connect or
v.db.addtable.
EXAMPLES
DBF
Local storage (the dbf/ subdirectory in the mapset must exist or must
be created by the user):
db.connect driver=dbf database=’$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/’
db.tables -p
SQLite
Local storage:
db.connect driver=sqlite
database=’$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite.db’
db.connect -p
db.tables -p
The SQLite database is created automatically when used the first time.
ODBC
Network storage: (may require the use of db.login):
db.connect driver=odbc database=gtest
db.login user=myname [pass=secret]
db.connect -p
db.tables -p
PostgreSQL
Network storage: (may require the use of db.login):
db.connect driver=pg database="host=myserver.itc.it,dbname=mydb"
db.login user=myname [pass=secret]
db.connect -p
db.tables -p
PostgreSQL with different port
Network storage: (may require the use of db.login):
db.connect driver=pg
database="host=myserver.itc.it,dbname=mydb,port=6666"
db.login user=myname [pass=secret]
db.connect -p
db.tables -p
MySQL (local)
Local storage (db.login may not be needed):
db.connect driver=mysql database=mydb
db.login user=myname [pass=secret]
db.connect -p
db.tables -p
MySQL (external server)
Network storage: (may require the use of db.login):
db.connect driver=mysql database="host=myserver.itc.it,dbname=mydb"
db.login user=myname [pass=secret]
db.connect -p
db.tables -p
SEE ALSO
db.columns, db.drivers, db.login, db.tables, v.db.addtable,
v.db.connect, GRASS SQL interface
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2008-03-13 08:02:47 +0100 (gio, 13 mar 2008) $
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