NAME

       CREATE_TABLESPACE - define a new tablespace

SYNOPSIS

       CREATE TABLESPACE tablespace_name
           [ OWNER { new_owner | CURRENT_USER | SESSION_USER } ]
           LOCATION 'directory'
           [ WITH ( tablespace_option = value [, ... ] ) ]

DESCRIPTION

       CREATE TABLESPACE registers a new cluster-wide tablespace. The tablespace name must be
       distinct from the name of any existing tablespace in the database cluster.

       A tablespace allows superusers to define an alternative location on the file system where
       the data files containing database objects (such as tables and indexes) can reside.

       A user with appropriate privileges can pass tablespace_name to CREATE DATABASE, CREATE
       TABLE, CREATE INDEX or ADD CONSTRAINT to have the data files for these objects stored
       within the specified tablespace.

           Warning
           A tablespace cannot be used independently of the cluster in which it is defined; see
           Section 22.6.

PARAMETERS

       tablespace_name
           The name of a tablespace to be created. The name cannot begin with pg_, as such names
           are reserved for system tablespaces.

       user_name
           The name of the user who will own the tablespace. If omitted, defaults to the user
           executing the command. Only superusers can create tablespaces, but they can assign
           ownership of tablespaces to non-superusers.

       directory
           The directory that will be used for the tablespace. The directory must exist (CREATE
           TABLESPACE will not create it), should be empty, and must be owned by the PostgreSQL
           system user. The directory must be specified by an absolute path name.

       tablespace_option
           A tablespace parameter to be set or reset. Currently, the only available parameters
           are seq_page_cost, random_page_cost and effective_io_concurrency. Setting either value
           for a particular tablespace will override the planner's usual estimate of the cost of
           reading pages from tables in that tablespace, as established by the configuration
           parameters of the same name (see seq_page_cost, random_page_cost,
           effective_io_concurrency). This may be useful if one tablespace is located on a disk
           which is faster or slower than the remainder of the I/O subsystem.

NOTES

       Tablespaces are only supported on systems that support symbolic links.

       CREATE TABLESPACE cannot be executed inside a transaction block.

EXAMPLES

       To create a tablespace dbspace at file system location /data/dbs, first create the
       directory using operating system facilities and set the correct ownership:

           mkdir /data/dbs
           chown postgres:postgres /data/dbs

       Then issue the tablespace creation command inside PostgreSQL:

           CREATE TABLESPACE dbspace LOCATION '/data/dbs';

       To create a tablespace owned by a different database user, use a command like this:

           CREATE TABLESPACE indexspace OWNER genevieve LOCATION '/data/indexes';

COMPATIBILITY

       CREATE TABLESPACE is a PostgreSQL extension.

SEE ALSO

       CREATE DATABASE (CREATE_DATABASE(7)), CREATE TABLE (CREATE_TABLE(7)), CREATE INDEX
       (CREATE_INDEX(7)), DROP TABLESPACE (DROP_TABLESPACE(7)), ALTER TABLESPACE
       (ALTER_TABLESPACE(7))