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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ALTER TABLESPACE</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="sql-altertable.html" title="ALTER TABLE" /><link rel="next" href="sql-altertsconfig.html" title="ALTER TEXT SEARCH CONFIGURATION" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">ALTER TABLESPACE</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-altertable.html" title="ALTER TABLE">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 11.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-altertsconfig.html" title="ALTER TEXT SEARCH CONFIGURATION">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-ALTERTABLESPACE"><div class="titlepage"></div><a id="id-1.9.3.36.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER TABLESPACE</span></h2><p>ALTER TABLESPACE — change the definition of a tablespace</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
ALTER TABLESPACE <em class="replaceable"><code>name</code></em> RENAME TO <em class="replaceable"><code>new_name</code></em>
ALTER TABLESPACE <em class="replaceable"><code>name</code></em> OWNER TO { <em class="replaceable"><code>new_owner</code></em> | CURRENT_USER | SESSION_USER }
ALTER TABLESPACE <em class="replaceable"><code>name</code></em> SET ( <em class="replaceable"><code>tablespace_option</code></em> = <em class="replaceable"><code>value</code></em> [, ... ] )
ALTER TABLESPACE <em class="replaceable"><code>name</code></em> RESET ( <em class="replaceable"><code>tablespace_option</code></em> [, ... ] )
</pre></div><div class="refsect1" id="id-1.9.3.36.5"><h2>Description</h2><p>
<code class="command">ALTER TABLESPACE</code> can be used to change the definition of
a tablespace.
</p><p>
You must own the tablespace to change the definition of a tablespace.
To alter the owner, you must also be a direct or indirect member of the new
owning role.
(Note that superusers have these privileges automatically.)
</p></div><div class="refsect1" id="id-1.9.3.36.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>
The name of an existing tablespace.
</p></dd><dt><span class="term"><em class="replaceable"><code>new_name</code></em></span></dt><dd><p>
The new name of the tablespace. The new name cannot
begin with <code class="literal">pg_</code>, as such names
are reserved for system tablespaces.
</p></dd><dt><span class="term"><em class="replaceable"><code>new_owner</code></em></span></dt><dd><p>
The new owner of the tablespace.
</p></dd><dt><span class="term"><em class="replaceable"><code>tablespace_option</code></em></span></dt><dd><p>
A tablespace parameter to be set or reset. Currently, the only
available parameters are <code class="varname">seq_page_cost</code>,
<code class="varname">random_page_cost</code> and <code class="varname">effective_io_concurrency</code>.
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 <a class="xref" href="runtime-config-query.html#GUC-SEQ-PAGE-COST">seq_page_cost</a>,
<a class="xref" href="runtime-config-query.html#GUC-RANDOM-PAGE-COST">random_page_cost</a>,
<a class="xref" href="runtime-config-resource.html#GUC-EFFECTIVE-IO-CONCURRENCY">effective_io_concurrency</a>). 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.
</p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.36.7"><h2>Examples</h2><p>
Rename tablespace <code class="literal">index_space</code> to <code class="literal">fast_raid</code>:
</p><pre class="programlisting">
ALTER TABLESPACE index_space RENAME TO fast_raid;
</pre><p>
</p><p>
Change the owner of tablespace <code class="literal">index_space</code>:
</p><pre class="programlisting">
ALTER TABLESPACE index_space OWNER TO mary;
</pre></div><div class="refsect1" id="id-1.9.3.36.8"><h2>Compatibility</h2><p>
There is no <code class="command">ALTER TABLESPACE</code> statement in
the SQL standard.
</p></div><div class="refsect1" id="id-1.9.3.36.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createtablespace.html" title="CREATE TABLESPACE"><span class="refentrytitle">CREATE TABLESPACE</span></a>, <a class="xref" href="sql-droptablespace.html" title="DROP TABLESPACE"><span class="refentrytitle">DROP TABLESPACE</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-altertable.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-altertsconfig.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ALTER TABLE </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> ALTER TEXT SEARCH CONFIGURATION</td></tr></table></div></body></html>
