<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >dblink_is_busy</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 9.0.15 Documentation" HREF="index.html"><LINK REL="UP" TITLE="dblink" HREF="dblink.html"><LINK REL="PREVIOUS" TITLE="dblink_send_query" HREF="contrib-dblink-send-query.html"><LINK REL="NEXT" TITLE="dblink_get_notify" HREF="contrib-dblink-get-notify.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="2014-01-24T13:16:52"></HEAD ><BODY CLASS="REFENTRY" ><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 9.0.15 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="dblink_send_query" HREF="contrib-dblink-send-query.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_get_notify" HREF="contrib-dblink-get-notify.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="CONTRIB-DBLINK-IS-BUSY" ></A >dblink_is_busy</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN124572" ></A ><H2 >Name</H2 >dblink_is_busy -- checks if connection is busy with an async query</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN124575" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >dblink_is_busy(text connname) returns int</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN124577" ></A ><H2 >Description</H2 ><P > <CODE CLASS="FUNCTION" >dblink_is_busy</CODE > tests whether an async query is in progress. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN124581" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" >conname</TT ></DT ><DD ><P > Name of the connection to check. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN124589" ></A ><H2 >Return Value</H2 ><P > Returns 1 if connection is busy, 0 if it is not busy. If this function returns 0, it is guaranteed that <CODE CLASS="FUNCTION" >dblink_get_result</CODE > will not block. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN124593" ></A ><H2 >Example</H2 ><PRE CLASS="PROGRAMLISTING" >SELECT dblink_is_busy('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-send-query.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-get-notify.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >dblink_send_query</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_get_notify</TD ></TR ></TABLE ></DIV ></BODY ></HTML >