grass-mesql(1grass)						Grass User's Manual					       grass-mesql(1grass)

NAME

       grass-mesql - MySQL embedded driver

       MySQL  embedded	driver	MySQL  embedded  driver  in GRASS MySQL database driver in GRASS enables GRASS to store vector attributes in MySQL
       embedded database without necessity to run MySQL server.

Driver and database name
       GRASS modules require 2 parameters to connect to a database.  Those parameters are 'driver' and 'database'. For MySQL embedded  driver  the
       parameter  'driver'  should  be	set  to value 'mesql'.	The parameter 'database' is a full path to the directory where database tables are
       stored. The best place is a directory in the mapset. The directory must be created before use of the driver. In the name of database it	is
       possible to use 3 variables:

		      $GISDBASE - path to current GISBASE

		      $LOCATION_NAME - name of current location

		      $MAPSET - name of current mapset

       Examples of connection parameters:
	 db.connect driver=mesql database='$GISDBASE/$LOCATION_NAME/$MAPSET/mysql'
	 db.connect driver=mesql database=/home/user1/db

Data types, indexes
       For more informations about supported data types and indexes see the documentation for MySQL (mysql) driver

Database type
       Because	database  closing  was	found  very  slow if InnoDB was used, the InnoDB storage is disabled by default (hardcoded '--skip-innodb'
       server option).

Note
       The embedded server is started with hardcoded '--bootstrap' option to avoid warning about missing mysql.time_zone_leap_second  table.  This
       can be fixed in future.

SEE ALSO

	db.connect, SQL support in GRASS GIS

Credits
       Development of the driver was sponsored by Faunalia (Italy) as part of a project for ATAC.

AUTHOR

       Radim Blazek

       Last changed: $Date: 2011-02-07 18:59:50 +0100 (Mon, 07 Feb 2011) $
       Help Index

GRASS 6.4.2														       grass-mesql(1grass)