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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>dblink_cancel_query</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 V1.79.1" /><link rel="prev" href="contrib-dblink-get-result.html" title="dblink_get_result" /><link rel="next" href="contrib-dblink-get-pkey.html" title="dblink_get_pkey" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">dblink_cancel_query</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="contrib-dblink-get-result.html" title="dblink_get_result">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="dblink.html" title="F.10. dblink">Up</a></td><th width="60%" align="center">F.10. dblink</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="contrib-dblink-get-pkey.html" title="dblink_get_pkey">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="CONTRIB-DBLINK-CANCEL-QUERY"><div class="titlepage"></div><a id="id-1.11.7.19.19.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">dblink_cancel_query</span></h2><p>dblink_cancel_query — cancels any active query on the named connection</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
+dblink_cancel_query(text connname) returns text
+</pre></div><div class="refsect1" id="id-1.11.7.19.19.5"><h2>Description</h2><p>
+    <code class="function">dblink_cancel_query</code> attempts to cancel any query that
+    is in progress on the named connection.  Note that this is not
+    certain to succeed (since, for example, the remote query might
+    already have finished).  A cancel request simply improves the
+    odds that the query will fail soon.  You must still complete the
+    normal query protocol, for example by calling
+    <code class="function">dblink_get_result</code>.
+   </p></div><div class="refsect1" id="id-1.11.7.19.19.6"><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>connname</code></em></span></dt><dd><p>
+       Name of the connection to use.
+      </p></dd></dl></div></div><div class="refsect1" id="id-1.11.7.19.19.7"><h2>Return Value</h2><p>
+    Returns <code class="literal">OK</code> if the cancel request has been sent, or
+    the text of an error message on failure.
+   </p></div><div class="refsect1" id="id-1.11.7.19.19.8"><h2>Examples</h2><pre class="programlisting">
+SELECT dblink_cancel_query('dtest1');
+</pre></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="contrib-dblink-get-result.html" title="dblink_get_result">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="dblink.html" title="F.10. dblink">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="contrib-dblink-get-pkey.html" title="dblink_get_pkey">Next</a></td></tr><tr><td width="40%" align="left" valign="top">dblink_get_result </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> dblink_get_pkey</td></tr></table></div></body></html>
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