xenial (7) CREATE_TABLESPACE.7.gz

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 21.6,
           “Tablespaces”, in the documentation.

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 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
           and random_page_cost. 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). 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

       Create a tablespace dbspace at /data/dbs:

           CREATE TABLESPACE dbspace LOCATION '/data/dbs';

       Create a tablespace indexspace at /data/indexes owned by user genevieve:

           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))