'\" t
.\"     Title: CREATE TABLESPACE
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\"      Date: 2016
.\"    Manual: PostgreSQL 9.5.2 Documentation
.\"    Source: PostgreSQL 9.5.2
.\"  Language: English
.\"
.TH "CREATE TABLESPACE" "5sql" "2016" "PostgreSQL 9.5.2" "PostgreSQL 9.5.2 Documentation"
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.SH "NAME"
CREATE_TABLESPACE \- define a new tablespace
.SH "SYNOPSIS"
.sp
.nf
CREATE TABLESPACE \fItablespace_name\fR
    [ OWNER { \fInew_owner\fR | CURRENT_USER | SESSION_USER } ]
    LOCATION \(aq\fIdirectory\fR\(aq
    [ WITH ( \fItablespace_option\fR = \fIvalue\fR [, \&.\&.\&. ] ) ]
.fi
.SH "DESCRIPTION"
.PP

\fBCREATE TABLESPACE\fR
registers a new cluster\-wide tablespace\&. The tablespace name must be distinct from the name of any existing tablespace in the database cluster\&.
.PP
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\&.
.PP
A user with appropriate privileges can pass
\fItablespace_name\fR
to
\fBCREATE DATABASE\fR,
\fBCREATE TABLE\fR,
\fBCREATE INDEX\fR
or
\fBADD CONSTRAINT\fR
to have the data files for these objects stored within the specified tablespace\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBWarning\fR
.ps -1
.br
.PP
A tablespace cannot be used independently of the cluster in which it is defined; see
Section 21.6, \(lqTablespaces\(rq, in the documentation\&.
.sp .5v
.RE
.SH "PARAMETERS"
.PP
\fItablespace_name\fR
.RS 4
The name of a tablespace to be created\&. The name cannot begin with
pg_, as such names are reserved for system tablespaces\&.
.RE
.PP
\fIuser_name\fR
.RS 4
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\&.
.RE
.PP
\fIdirectory\fR
.RS 4
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\&.
.RE
.PP
\fItablespace_option\fR
.RS 4
A tablespace parameter to be set or reset\&. Currently, the only available parameters are
\fIseq_page_cost\fR
and
\fIrandom_page_cost\fR\&. Setting either value for a particular tablespace will override the planner\(aqs 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\&.
.RE
.SH "NOTES"
.PP
Tablespaces are only supported on systems that support symbolic links\&.
.PP

\fBCREATE TABLESPACE\fR
cannot be executed inside a transaction block\&.
.SH "EXAMPLES"
.PP
Create a tablespace
dbspace
at
/data/dbs:
.sp
.if n \{\
.RS 4
.\}
.nf
CREATE TABLESPACE dbspace LOCATION \(aq/data/dbs\(aq;
.fi
.if n \{\
.RE
.\}
.PP
Create a tablespace
indexspace
at
/data/indexes
owned by user
genevieve:
.sp
.if n \{\
.RS 4
.\}
.nf
CREATE TABLESPACE indexspace OWNER genevieve LOCATION \(aq/data/indexes\(aq;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP

\fBCREATE TABLESPACE\fR
is a
PostgreSQL
extension\&.
.SH "SEE ALSO"
CREATE DATABASE (\fBCREATE_DATABASE\fR(5)), CREATE TABLE (\fBCREATE_TABLE\fR(5)), CREATE INDEX (\fBCREATE_INDEX\fR(5)), DROP TABLESPACE (\fBDROP_TABLESPACE\fR(5)), ALTER TABLESPACE (\fBALTER_TABLESPACE\fR(5))