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   2 <!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>DROP 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-dropstatistics.html" title="DROP STATISTICS" /><link rel="next" href="sql-droptable.html" title="DROP TABLE" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">DROP SUBSCRIPTION</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-dropstatistics.html" title="DROP 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 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-droptable.html" title="DROP TABLE">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-DROPSUBSCRIPTION"><div class="titlepage"></div><a id="id-1.9.3.133.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">DROP SUBSCRIPTION</span></h2><p>DROP SUBSCRIPTION — remove a subscription</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
   3 DROP SUBSCRIPTION [ IF EXISTS ] <em class="replaceable"><code>name</code></em> [ CASCADE | RESTRICT ]
   4 </pre></div><div class="refsect1" id="id-1.9.3.133.5"><h2>Description</h2><p>
   5    <code class="command">DROP SUBSCRIPTION</code> removes a subscription from the
   6    database cluster.
   7   </p><p>
   8    To execute this command the user must be the owner of the subscription.
   9   </p><p>
  10    <code class="command">DROP SUBSCRIPTION</code> cannot be executed inside a
  11    transaction block if the subscription is associated with a replication
  12    slot.  (You can use <a class="link" href="sql-altersubscription.html" title="ALTER SUBSCRIPTION"><code class="command">ALTER SUBSCRIPTION</code></a> to unset the
  13    slot.)
  14   </p></div><div class="refsect1" id="id-1.9.3.133.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>
  15       The name of a subscription to be dropped.
  16      </p></dd><dt><span class="term"><code class="literal">CASCADE</code><br /></span><span class="term"><code class="literal">RESTRICT</code></span></dt><dd><p>
  17       These key words do not have any effect, since there are no dependencies
  18       on subscriptions.
  19      </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.133.7"><h2>Notes</h2><p>
  20    When dropping a subscription that is associated with a replication slot on
  21    the remote host (the normal state), <code class="command">DROP SUBSCRIPTION</code>
  22    will connect to the remote host and try to drop the replication slot (and
  23    any remaining table synchronization slots) as
  24    part of its operation.  This is necessary so that the resources allocated
  25    for the subscription on the remote host are released.  If this fails,
  26    either because the remote host is not reachable or because the remote
  27    replication slot cannot be dropped or does not exist or never existed,
  28    the <code class="command">DROP SUBSCRIPTION</code> command will fail.  To proceed
  29    in this situation, first disable the subscription by executing
  30    <a class="link" href="sql-altersubscription.html#SQL-ALTERSUBSCRIPTION-PARAMS-DISABLE">
  31    <code class="literal">ALTER SUBSCRIPTION ... DISABLE</code></a>, and then disassociate
  32    it from the replication slot by executing
  33    <a class="link" href="sql-altersubscription.html#SQL-ALTERSUBSCRIPTION-PARAMS-SET">
  34    <code class="literal">ALTER SUBSCRIPTION ... SET (slot_name = NONE)</code></a>.
  35    After that, <code class="command">DROP SUBSCRIPTION</code> will no longer attempt any
  36    actions on a remote host.  Note that if the remote replication slot still
  37    exists, it (and any related table synchronization slots) should then be
  38    dropped manually; otherwise it/they will continue to
  39    reserve WAL and might eventually cause the disk to fill up.  See
  40    also <a class="xref" href="logical-replication-subscription.html#LOGICAL-REPLICATION-SUBSCRIPTION-SLOT" title="29.2.1. Replication Slot Management">Section 29.2.1</a>.
  41   </p><p>
  42    If a subscription is associated with a replication slot, then <code class="command">DROP
  43    SUBSCRIPTION</code> cannot be executed inside a transaction block.
  44   </p></div><div class="refsect1" id="id-1.9.3.133.8"><h2>Examples</h2><p>
  45    Drop a subscription:
  46 </p><pre class="programlisting">
  47 DROP SUBSCRIPTION mysub;
  48 </pre></div><div class="refsect1" id="id-1.9.3.133.9"><h2>Compatibility</h2><p>
  49    <code class="command">DROP SUBSCRIPTION</code> is a <span class="productname">PostgreSQL</span>
  50    extension.
  51   </p></div><div class="refsect1" id="id-1.9.3.133.10"><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-altersubscription.html" title="ALTER SUBSCRIPTION"><span class="refentrytitle">ALTER SUBSCRIPTION</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-dropstatistics.html" title="DROP 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-droptable.html" title="DROP TABLE">Next</a></td></tr><tr><td width="40%" align="left" valign="top">DROP STATISTICS </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> DROP TABLE</td></tr></table></div></body></html>