CLUSTERDB(1)						  PostgreSQL Client Applications					      CLUSTERDB(1)

NAME

       clusterdb - cluster a PostgreSQL database

SYNOPSIS

       clusterdb [ connection-option... ]  [  [ --verbose ]  [ -v ]  ]	[ --table | -t table  ]  [ dbname ]

       clusterdb [ connection-option... ]  [  [ --all ]  [ -a ]  ]  [  [ --verbose ]  [ -v ]  ]

DESCRIPTION

       clusterdb  is a utility for reclustering tables in a PostgreSQL database. It finds tables that have previously been clustered, and clusters
       them again on the same index that was last used. Tables that have never been clustered are not affected.

       clusterdb is a wrapper around the SQL command CLUSTER [cluster(7)].  There is no effective difference between clustering databases via this
       utility and via other methods for accessing the server.

OPTIONS

       clusterdb accepts the following command-line arguments:

       -a

       --all  Cluster all databases.

       [-d] dbname

       [--dbname] dbname
	      Specifies  the  name  of the database to be clustered.  If this is not specified and -a (or --all) is not used, the database name is
	      read from the environment variable PGDATABASE. If that is not set, the user name specified for the connection is used.

       -e

       --echo Echo the commands that clusterdb generates and sends to the server.

       -q

       --quiet
	      Do not display progress messages.

       -t table

       --table table
	      Cluster table only.

       -v

       --verbose
	      Print detailed information during processing.

       clusterdb also accepts the following command-line arguments for connection parameters:

       -h host

       --host host
	      Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory
	      for the Unix domain socket.

       -p port

       --port port
	      Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.

       -U username

       --username username
	      User name to connect as.

       -w

       --no-password
	      Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as
	      a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user  is  present	to
	      enter a password.

       -W

       --password
	      Force clusterdb to prompt for a password before connecting to a database.

	      This  option is never essential, since clusterdb will automatically prompt for a password if the server demands password authentica-
	      tion.  However, clusterdb will waste a connection attempt finding out that the server wants a password.  In some cases it  is  worth
	      typing -W to avoid the extra connection attempt.

ENVIRONMENT

       PGDATABASE

       PGHOST

       PGPORT

       PGUSER Default connection parameters

       This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see in the documentation).

DIAGNOSTICS

       In  case of difficulty, see CLUSTER [cluster(7)] and psql(1) for discussions of potential problems and error messages.  The database server
       must be running at the targeted host. Also, any default connection settings and environment variables used by the libpq	front-end  library
       will apply.

EXAMPLES

       To cluster the database test:

       $ clusterdb test

       To cluster a single table foo in a database named xyzzy:

       $ clusterdb --table foo xyzzy

SEE ALSO

       CLUSTER [cluster(7)]

Application							    2010-05-14							      CLUSTERDB(1)