<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >dblink_error_message</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 9.6.17 Documentation" HREF="index.html"><LINK REL="UP" TITLE="dblink" HREF="dblink.html"><LINK REL="PREVIOUS" TITLE="dblink_get_connections" HREF="contrib-dblink-get-connections.html"><LINK REL="NEXT" TITLE="dblink_send_query" HREF="contrib-dblink-send-query.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="2020-02-15T12:30:38"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="4" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.6.17 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="dblink_get_connections" HREF="contrib-dblink-get-connections.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="dblink.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="dblink_send_query" HREF="contrib-dblink-send-query.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="CONTRIB-DBLINK-ERROR-MESSAGE" ></A >dblink_error_message</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN137068" ></A ><H2 >Name</H2 >dblink_error_message -- gets last error message on the named connection</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN137071" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >dblink_error_message(text connname) returns text</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN137073" ></A ><H2 >Description</H2 ><P > <CODE CLASS="FUNCTION" >dblink_error_message</CODE > fetches the most recent remote error message for a given connection. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN137077" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" >connname</TT ></DT ><DD ><P > Name of the connection to use. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN137085" ></A ><H2 >Return Value</H2 ><P > Returns last error message, or <TT CLASS="LITERAL" >OK</TT > if there has been no error in this connection. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN137089" ></A ><H2 >Notes</H2 ><P > When asynchronous queries are initiated by <CODE CLASS="FUNCTION" >dblink_send_query</CODE >, the error message associated with the connection might not get updated until the server's response message is consumed. This typically means that <CODE CLASS="FUNCTION" >dblink_is_busy</CODE > or <CODE CLASS="FUNCTION" >dblink_get_result</CODE > should be called prior to <CODE CLASS="FUNCTION" >dblink_error_message</CODE >, so that any error generated by the asynchronous query will be visible. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN137096" ></A ><H2 >Examples</H2 ><PRE CLASS="PROGRAMLISTING" >SELECT dblink_error_message('dtest1');</PRE ></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="contrib-dblink-get-connections.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-send-query.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >dblink_get_connections</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="dblink.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >dblink_send_query</TD ></TR ></TABLE ></DIV ></BODY ></HTML >