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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >dblink</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Additional Supplied Modules" HREF="contrib.html"><LINK REL="PREVIOUS" TITLE="cube" HREF="cube.html"><LINK REL="NEXT" TITLE="dblink_connect" HREF="contrib-dblink-connect.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="cube" HREF="cube.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="contrib.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Appendix F. Additional Supplied Modules</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="dblink_connect" HREF="contrib-dblink-connect.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="DBLINK" >F.9. dblink</A ></H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT ><A HREF="contrib-dblink-connect.html" >dblink_connect</A > -- opens a persistent connection to a remote database</DT ><DT ><A HREF="contrib-dblink-connect-u.html" >dblink_connect_u</A > -- opens a persistent connection to a remote database, insecurely</DT ><DT ><A HREF="contrib-dblink-disconnect.html" >dblink_disconnect</A > -- closes a persistent connection to a remote database</DT ><DT ><A HREF="contrib-dblink-function.html" >dblink</A > -- executes a query in a remote database</DT ><DT ><A HREF="contrib-dblink-exec.html" >dblink_exec</A > -- executes a command in a remote database</DT ><DT ><A HREF="contrib-dblink-open.html" >dblink_open</A > -- opens a cursor in a remote database</DT ><DT ><A HREF="contrib-dblink-fetch.html" >dblink_fetch</A > -- returns rows from an open cursor in a remote database</DT ><DT ><A HREF="contrib-dblink-close.html" >dblink_close</A > -- closes a cursor in a remote database</DT ><DT ><A HREF="contrib-dblink-get-connections.html" >dblink_get_connections</A > -- returns the names of all open named dblink connections</DT ><DT ><A HREF="contrib-dblink-error-message.html" >dblink_error_message</A > -- gets last error message on the named connection</DT ><DT ><A HREF="contrib-dblink-send-query.html" >dblink_send_query</A > -- sends an async query to a remote database</DT ><DT ><A HREF="contrib-dblink-is-busy.html" >dblink_is_busy</A > -- checks if connection is busy with an async query</DT ><DT ><A HREF="contrib-dblink-get-notify.html" >dblink_get_notify</A > -- retrieve async notifications on a connection</DT ><DT ><A HREF="contrib-dblink-get-result.html" >dblink_get_result</A > -- gets an async query result</DT ><DT ><A HREF="contrib-dblink-cancel-query.html" >dblink_cancel_query</A > -- cancels any active query on the named connection</DT ><DT ><A HREF="contrib-dblink-get-pkey.html" >dblink_get_pkey</A > -- returns the positions and field names of a relation's primary key fields </DT ><DT ><A HREF="contrib-dblink-build-sql-insert.html" >dblink_build_sql_insert</A > -- builds an INSERT statement using a local tuple, replacing the primary key field values with alternative supplied values </DT ><DT ><A HREF="contrib-dblink-build-sql-delete.html" >dblink_build_sql_delete</A > -- builds a DELETE statement using supplied values for primary key field values </DT ><DT ><A HREF="contrib-dblink-build-sql-update.html" >dblink_build_sql_update</A > -- builds an UPDATE statement using a local tuple, replacing the primary key field values with alternative supplied values </DT ></DL ></DIV ><P > <TT CLASS="FILENAME" >dblink</TT > is a module which supports connections to other <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > databases from within a database session. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="cube.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="contrib-dblink-connect.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >cube</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="contrib.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >dblink_connect</TD ></TR ></TABLE ></DIV ></BODY ></HTML >