reindexdb

Rebuilds indexes in a database.

Synopsis

reindexdb [<connection-option> ...] [<option> ...] [-S | --schema <schema>] ...
        [-t | --table <table>] 
        [-i | --index <index>] ... [<dbname>]

reindexdb [<connection-option> ...] [<option> ...] -a | --all

reindexdb [<connection-option> ...] [<option> ...] -s | --system [<dbname>]

reindexdb -? | --help

reindexdb -V | --version

Description

reindexdb is a utility for rebuilding indexes in Greenplum Database.

reindexdb is a wrapper around the SQL command REINDEX. There is no effective difference between reindexing databases via this utility and via other methods for accessing the server.

Options

reindexdb accepts the following command-line arguments:

-a

--all

Reindex all databases.

[-d] dbname

[--dbname=]dbname

Specifies the name of the database to be reindexed, when -a or --all is not used. If this is not specified, Greenplum Database reads the database name from the environment variable PGDATABASE. If that is not set, the user name specified for the connection is used. The dbname can be a connection string. If so, connection string parameters will override any conflicting command line options.

-e

--echo

Echo the commands that reindexdb generates and sends to the server.

-i index

--index=index

Recreate index only. You can recreate multiple indexes by specifying multiple -i switches.

-q

--quiet

Do not display progress messages.

-s

--system

Reindex system catalogs only.

-S schema

--schema=schema

Reindex schema only. You can reindex multiple schemas by specifying multiple -S switches.

-t table

--table=table

Reindex table only. You can reindex multiple tables by specifying multiple -t switches.

-v

--verbose

Print detailed information during processing.

-V

--version

Print the reindexdb version and exit.

-?

--help

Show help about reindexdb command line arguments, and exit.

Connection Options

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

-h host

--host=host

Specifies the host name of the machine on which the Greenplum coordinator database server is running. If not specified, reads from the environment variable PGHOST or defaults to localhost.

-p port

--port=port

Specifies the TCP port on which the Greenplum coordinator database server is listening for connections. If not specified, reads from the environment variable PGPORT or defaults to 5432.

-U username

--username=username

The database user name to connect as. If not specified, reads from the environment variable PGUSER or defaults to the current system user name.

-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 reindexdb to prompt for a password before connecting to a database.

This option is never essential, since reindexdb automatically prompts for a password if the server demands password authentication. However, reindexdb 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.

--maintenance-db=dbname

Specifies the name of the database to connect to discover what other databases should be reindexed, when -a or --all is used. If not specified, the postgres database will be used, and if that does not exist, template1 will be used. This can be a connection. If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.

Notes

reindexdb causes locking of system catalog tables, which could affect currently running queries. To avoid disrupting ongoing business operations, schedule the reindexb operation during a period of low activity.

reindexdb might need to connect several times to the coordinator server, asking for a password each time. It is convenient to have a ~/.pgpass file in such cases.

Environment

PGDATABASE

PGHOST

PGPORT

PGUSER

Default connection parameters.

PG_COLOR

Specifies whether to use color in diagnostic messages. Possible values are always, auto, and never.

This utility, like most other Greenplum Database utilities, also uses the environment variables supported by libpq.

Diagnostics

In case of difficulty, see REINDEX and psql 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.

Notes

reindexdb might need to connect several times to the Greenplum Database server, asking for a password each time. It is convenient to have a ~/.pgpass file in such cases.

Examples

To reindex the database named mydb:

reindexdb mydb

To reindex the table foo and the index bar in a database named abcd:

reindexdb --table=foo --index=bar abcd

See Also

REINDEX