CLUSTERDB(1)            PostgreSQL Client Applications            CLUSTERDB(1)


       clusterdb - cluster a PostgreSQL database


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

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


       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.


       clusterdb accepts the following command-line arguments:


       --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.


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


              Do not display a response.

       -t table

       --table table
              Cluster table only.

       clusterdb also accepts the following command-line arguments for connec-
       tion 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  exten-
              sion on which the server is listening for connections.

       -U username

       --username username
              User name to connect as.


              Force password prompt.





       PGUSER Default connection parameters


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


       To cluster the database test:

       $ clusterdb test

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

       $ clusterdb --table foo xyzzy


       CLUSTER [cluster(7)]

Application                       2005-01-17                      CLUSTERDB(1)

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