<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Closing a Connection</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 8.0.11 Documentation" HREF="index.html"><LINK REL="UP" TITLE="ECPG - Embedded SQL in C" HREF="ecpg.html"><LINK REL="PREVIOUS" TITLE="Connecting to the Database Server" HREF="ecpg-connect.html"><LINK REL="NEXT" TITLE="Running SQL Commands" HREF="ecpg-commands.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="2007-02-02T03:57:22"></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" >PostgreSQL 8.0.11 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="ecpg-connect.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="ecpg.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 29. <SPAN CLASS="APPLICATION" >ECPG</SPAN > - Embedded <ACRONYM CLASS="ACRONYM" >SQL</ACRONYM > in C</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="ecpg.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="ecpg-commands.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="ECPG-DISCONNECT" >29.3. Closing a Connection</A ></H1 ><P > To close a connection, use the following statement: </P><PRE CLASS="PROGRAMLISTING" >EXEC SQL DISCONNECT [<SPAN CLASS="OPTIONAL" ><TT CLASS="REPLACEABLE" ><I >connection</I ></TT ></SPAN >];</PRE ><P> The <TT CLASS="REPLACEABLE" ><I >connection</I ></TT > can be specified in the following ways: <P ></P ></P><UL ><LI ><P > <TT CLASS="LITERAL" ><TT CLASS="REPLACEABLE" ><I >connection-name</I ></TT ></TT > </P ></LI ><LI ><P > <TT CLASS="LITERAL" >DEFAULT</TT > </P ></LI ><LI ><P > <TT CLASS="LITERAL" >CURRENT</TT > </P ></LI ><LI ><P > <TT CLASS="LITERAL" >ALL</TT > </P ></LI ></UL ><P> If no connection name is specified, the current connection is closed. </P ><P > It is good style that an application always explicitly disconnect from every connection it opened. </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="ecpg-connect.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="ecpg-commands.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Connecting to the Database Server</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecpg.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Running SQL Commands</TD ></TR ></TABLE ></DIV ></BODY ></HTML >