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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 SUBSCRIPTION</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-alterstatistics.html" title="ALTER STATISTICS" /><link rel="next" href="sql-altersystem.html" title="ALTER SYSTEM" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">ALTER SUBSCRIPTION</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-alterstatistics.html" title="ALTER STATISTICS">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 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-altersystem.html" title="ALTER SYSTEM">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-ALTERSUBSCRIPTION"><div class="titlepage"></div><a id="id-1.9.3.33.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER SUBSCRIPTION</span></h2><p>ALTER SUBSCRIPTION — change the definition of a subscription</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> CONNECTION '<em class="replaceable"><code>conninfo</code></em>'
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> SET PUBLICATION <em class="replaceable"><code>publication_name</code></em> [, ...] [ WITH ( <em class="replaceable"><code>publication_option</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] ) ]
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> ADD PUBLICATION <em class="replaceable"><code>publication_name</code></em> [, ...] [ WITH ( <em class="replaceable"><code>publication_option</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] ) ]
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> DROP PUBLICATION <em class="replaceable"><code>publication_name</code></em> [, ...] [ WITH ( <em class="replaceable"><code>publication_option</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] ) ]
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> REFRESH PUBLICATION [ WITH ( <em class="replaceable"><code>refresh_option</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] ) ]
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> ENABLE
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> DISABLE
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> SET ( <em class="replaceable"><code>subscription_parameter</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] )
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> SKIP ( <em class="replaceable"><code>skip_option</code></em> = <em class="replaceable"><code>value</code></em> )
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> OWNER TO { <em class="replaceable"><code>new_owner</code></em> | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
ALTER SUBSCRIPTION <em class="replaceable"><code>name</code></em> RENAME TO <em class="replaceable"><code>new_name</code></em>
</pre></div><div class="refsect1" id="id-1.9.3.33.5"><h2>Description</h2><p>
<code class="command">ALTER SUBSCRIPTION</code> can change most of the subscription
properties that can be specified
in <a class="xref" href="sql-createsubscription.html" title="CREATE SUBSCRIPTION"><span class="refentrytitle">CREATE SUBSCRIPTION</span></a>.
</p><p>
You must own the subscription to use <code class="command">ALTER SUBSCRIPTION</code>.
To alter the owner, you must also be a direct or indirect member of the
new owning role. The new owner has to be a superuser.
(Currently, all subscription owners must be superusers, so the owner checks
will be bypassed in practice. But this might change in the future.)
</p><p>
When refreshing a publication we remove the relations that are no longer
part of the publication and we also remove the table synchronization slots
if there are any. It is necessary to remove these slots so that the resources
allocated for the subscription on the remote host are released. If due to
network breakdown or some other error, <span class="productname">PostgreSQL</span>
is unable to remove the slots, an error will be reported. To proceed in this
situation, the user either needs to retry the operation or disassociate the
slot from the subscription and drop the subscription as explained in
<a class="xref" href="sql-dropsubscription.html" title="DROP SUBSCRIPTION"><span class="refentrytitle">DROP SUBSCRIPTION</span></a>.
</p><p>
Commands <code class="command">ALTER SUBSCRIPTION ... REFRESH PUBLICATION</code> and
<code class="command">ALTER SUBSCRIPTION ... {SET|ADD|DROP} PUBLICATION ...</code>
with <code class="literal">refresh</code> option as <code class="literal">true</code> cannot be
executed inside a transaction block.
These commands also cannot be executed when the subscription has
<code class="literal">two_phase</code> commit enabled,
unless <code class="literal">copy_data</code> is <code class="literal">false</code>.
See column <code class="structfield">subtwophasestate</code> of
<a class="link" href="catalog-pg-subscription.html" title="53.54. pg_subscription"><code class="structname">pg_subscription</code></a>
to know the actual two-phase state.
</p></div><div class="refsect1" id="id-1.9.3.33.6"><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 a subscription whose properties are to be altered.
</p></dd><dt><span class="term"><code class="literal">CONNECTION '<em class="replaceable"><code>conninfo</code></em>'</code></span></dt><dd><p>
This clause replaces the connection string originally set by
<a class="xref" href="sql-createsubscription.html" title="CREATE SUBSCRIPTION"><span class="refentrytitle">CREATE SUBSCRIPTION</span></a>. See there for more
information.
</p></dd><dt><span class="term"><code class="literal">SET PUBLICATION <em class="replaceable"><code>publication_name</code></em></code><br /></span><span class="term"><code class="literal">ADD PUBLICATION <em class="replaceable"><code>publication_name</code></em></code><br /></span><span class="term"><code class="literal">DROP PUBLICATION <em class="replaceable"><code>publication_name</code></em></code></span></dt><dd><p>
These forms change the list of subscribed publications.
<code class="literal">SET</code>
replaces the entire list of publications with a new list,
<code class="literal">ADD</code> adds additional publications to the list of
publications, and <code class="literal">DROP</code> removes the publications from
the list of publications. We allow non-existent publications to be
specified in <code class="literal">ADD</code> and <code class="literal">SET</code> variants
so that users can add those later. See <a class="xref" href="sql-createsubscription.html" title="CREATE SUBSCRIPTION"><span class="refentrytitle">CREATE SUBSCRIPTION</span></a>
for more information. By default, this command will also act like
<code class="literal">REFRESH PUBLICATION</code>.
</p><p>
<em class="replaceable"><code>publication_option</code></em> specifies additional
options for this operation. The supported options are:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">refresh</code> (<code class="type">boolean</code>)</span></dt><dd><p>
When false, the command will not try to refresh table information.
<code class="literal">REFRESH PUBLICATION</code> should then be executed separately.
The default is <code class="literal">true</code>.
</p></dd></dl></div><p>
Additionally, the options described under
<code class="literal">REFRESH PUBLICATION</code> may be specified, to control the
implicit refresh operation.
</p></dd><dt><span class="term"><code class="literal">REFRESH PUBLICATION</code></span></dt><dd><p>
Fetch missing table information from publisher. This will start
replication of tables that were added to the subscribed-to publications
since <code class="command">CREATE SUBSCRIPTION</code> or
the last invocation of <code class="command">REFRESH PUBLICATION</code>.
</p><p>
<em class="replaceable"><code>refresh_option</code></em> specifies additional options for the
refresh operation. The supported options are:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">copy_data</code> (<code class="type">boolean</code>)</span></dt><dd><p>
Specifies whether to copy pre-existing data in the publications
that are being subscribed to when the replication starts.
The default is <code class="literal">true</code>.
</p><p>
Previously subscribed tables are not copied, even if a table's row
filter <code class="literal">WHERE</code> clause has since been modified.
</p></dd></dl></div></dd><dt><span class="term"><code class="literal">ENABLE</code></span></dt><dd><p>
Enables a previously disabled subscription, starting the logical
replication worker at the end of the transaction.
</p></dd><dt><span class="term"><code class="literal">DISABLE</code></span></dt><dd><p>
Disables a running subscription, stopping the logical replication
worker at the end of the transaction.
</p></dd><dt><span class="term"><code class="literal">SET ( <em class="replaceable"><code>subscription_parameter</code></em> [= <em class="replaceable"><code>value</code></em>] [, ... ] )</code></span></dt><dd><p>
This clause alters parameters originally set by
<a class="xref" href="sql-createsubscription.html" title="CREATE SUBSCRIPTION"><span class="refentrytitle">CREATE SUBSCRIPTION</span></a>. See there for more
information. The parameters that can be altered
are <code class="literal">slot_name</code>,
<code class="literal">synchronous_commit</code>,
<code class="literal">binary</code>, <code class="literal">streaming</code>, and
<code class="literal">disable_on_error</code>.
</p></dd><dt><span class="term"><code class="literal">SKIP ( <em class="replaceable"><code>skip_option</code></em> = <em class="replaceable"><code>value</code></em> )</code></span></dt><dd><p>
Skips applying all changes of the remote transaction. If incoming data
violates any constraints, logical replication will stop until it is
resolved. By using the <code class="command">ALTER SUBSCRIPTION ... SKIP</code> command,
the logical replication worker skips all data modification changes within
the transaction. This option has no effect on the transactions that are
already prepared by enabling <code class="literal">two_phase</code> on
subscriber.
After the logical replication worker successfully skips the transaction or
finishes a transaction, the LSN (stored in
<code class="structname">pg_subscription</code>.<code class="structfield">subskiplsn</code>)
is cleared. See <a class="xref" href="logical-replication-conflicts.html" title="31.5. Conflicts">Section 31.5</a> for
the details of logical replication conflicts. Using this command requires
superuser privilege.
</p><p>
<em class="replaceable"><code>skip_option</code></em> specifies options for this operation.
The supported option is:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">lsn</code> (<code class="type">pg_lsn</code>)</span></dt><dd><p>
Specifies the finish LSN of the remote transaction whose changes
are to be skipped by the logical replication worker. The finish LSN
is the LSN at which the transaction is either committed or prepared.
Skipping individual subtransactions is not supported. Setting
<code class="literal">NONE</code> resets the LSN.
</p></dd></dl></div></dd><dt><span class="term"><em class="replaceable"><code>new_owner</code></em></span></dt><dd><p>
The user name of the new owner of the subscription.
</p></dd><dt><span class="term"><em class="replaceable"><code>new_name</code></em></span></dt><dd><p>
The new name for the subscription.
</p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.33.7"><h2>Examples</h2><p>
Change the publication subscribed by a subscription to
<code class="literal">insert_only</code>:
</p><pre class="programlisting">
ALTER SUBSCRIPTION mysub SET PUBLICATION insert_only;
</pre><p>
</p><p>
Disable (stop) the subscription:
</p><pre class="programlisting">
ALTER SUBSCRIPTION mysub DISABLE;
</pre></div><div class="refsect1" id="id-1.9.3.33.8"><h2>Compatibility</h2><p>
<code class="command">ALTER SUBSCRIPTION</code> is a <span class="productname">PostgreSQL</span>
extension.
</p></div><div class="refsect1" id="id-1.9.3.33.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createsubscription.html" title="CREATE SUBSCRIPTION"><span class="refentrytitle">CREATE SUBSCRIPTION</span></a>, <a class="xref" href="sql-dropsubscription.html" title="DROP SUBSCRIPTION"><span class="refentrytitle">DROP SUBSCRIPTION</span></a>, <a class="xref" href="sql-createpublication.html" title="CREATE PUBLICATION"><span class="refentrytitle">CREATE PUBLICATION</span></a>, <a class="xref" href="sql-alterpublication.html" title="ALTER PUBLICATION"><span class="refentrytitle">ALTER PUBLICATION</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-alterstatistics.html" title="ALTER STATISTICS">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-altersystem.html" title="ALTER SYSTEM">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ALTER STATISTICS </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> ALTER SYSTEM</td></tr></table></div></body></html>
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