Provided by: postgresql-client-10_10.3-1_amd64 bug


       clusterdb - cluster a PostgreSQL database


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

       clusterdb [connection-option...] [--verbose | -v] --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(7). There is no effective difference
       between clustering databases via this utility and via other methods for accessing the


       clusterdb accepts the following command-line arguments:

           Cluster all databases.

       [-d] 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 the commands that clusterdb generates and sends to the server.

           Do not display progress messages.

       -t table
           Cluster table only. Multiple tables can be clustered by writing multiple -t switches.

           Print detailed information during processing.

           Print the clusterdb version and exit.

           Show help about clusterdb command line arguments, and exit.

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

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

       -U username
           User name to connect as.

           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.

           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 authentication. 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.

           Specifies the name of the database to connect to discover what other databases should
           be clustered. If not specified, the postgres database will be used, and if that does
           not exist, template1 will be used.


           Default connection parameters

       This utility, like most other PostgreSQL utilities, also uses the environment variables
       supported by libpq (see Section 33.14).


       In case of difficulty, see 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.


       To cluster the database test:

           $ clusterdb test

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

           $ clusterdb --table=foo xyzzy