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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!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>F.10. dblink</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="cube.html" title="F.9. cube" /><link rel="next" href="contrib-dblink-connect.html" title="dblink_connect" /></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">F.10. dblink</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="cube.html" title="F.9. cube">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules">Up</a></td><th width="60%" align="center">Appendix F. Additional Supplied Modules</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-connect.html" title="dblink_connect">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="DBLINK"><div class="titlepage"><div><div><h2 class="title" style="clear: both">F.10. dblink</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="refentrytitle"><a href="contrib-dblink-connect.html">dblink_connect</a></span><span class="refpurpose"> — opens a persistent connection to a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-connect-u.html">dblink_connect_u</a></span><span class="refpurpose"> — opens a persistent connection to a remote database, insecurely</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-disconnect.html">dblink_disconnect</a></span><span class="refpurpose"> — closes a persistent connection to a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-function.html">dblink</a></span><span class="refpurpose"> — executes a query in a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-exec.html">dblink_exec</a></span><span class="refpurpose"> — executes a command in a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-open.html">dblink_open</a></span><span class="refpurpose"> — opens a cursor in a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-fetch.html">dblink_fetch</a></span><span class="refpurpose"> — returns rows from an open cursor in a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-close.html">dblink_close</a></span><span class="refpurpose"> — closes a cursor in a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-get-connections.html">dblink_get_connections</a></span><span class="refpurpose"> — returns the names of all open named dblink connections</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-error-message.html">dblink_error_message</a></span><span class="refpurpose"> — gets last error message on the named connection</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-send-query.html">dblink_send_query</a></span><span class="refpurpose"> — sends an async query to a remote database</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-is-busy.html">dblink_is_busy</a></span><span class="refpurpose"> — checks if connection is busy with an async query</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-get-notify.html">dblink_get_notify</a></span><span class="refpurpose"> — retrieve async notifications on a connection</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-get-result.html">dblink_get_result</a></span><span class="refpurpose"> — gets an async query result</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-cancel-query.html">dblink_cancel_query</a></span><span class="refpurpose"> — cancels any active query on the named connection</span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-get-pkey.html">dblink_get_pkey</a></span><span class="refpurpose"> — returns the positions and field names of a relation's
+ primary key fields
+ </span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-build-sql-insert.html">dblink_build_sql_insert</a></span><span class="refpurpose"> —
+ builds an INSERT statement using a local tuple, replacing the
+ primary key field values with alternative supplied values
+ </span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-build-sql-delete.html">dblink_build_sql_delete</a></span><span class="refpurpose"> — builds a DELETE statement using supplied values for primary
+ key field values
+ </span></dt><dt><span class="refentrytitle"><a href="contrib-dblink-build-sql-update.html">dblink_build_sql_update</a></span><span class="refpurpose"> — builds an UPDATE statement using a local tuple, replacing
+ the primary key field values with alternative supplied values
+ </span></dt></dl></div><a id="id-1.11.7.19.2" class="indexterm"></a><p>
+ <code class="filename">dblink</code> is a module that supports connections to
+ other <span class="productname">PostgreSQL</span> databases from within a database
+ session.
+ </p><p>
+ See also <a class="xref" href="postgres-fdw.html" title="F.33. postgres_fdw">postgres_fdw</a>, which provides roughly the same
+ functionality using a more modern and standards-compliant infrastructure.
+ </p></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="cube.html" title="F.9. cube">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="contrib-dblink-connect.html" title="dblink_connect">Next</a></td></tr><tr><td width="40%" align="left" valign="top">F.9. cube </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_connect</td></tr></table></div></body></html> \ No newline at end of file