for the AT clause in threaded ECPG applications.
Philip Yarra
<!--
-$PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.56 2003/11/29 19:51:36 pgsql Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.57 2003/12/01 22:36:40 momjian Exp $
-->
<chapter id="ecpg">
</programlisting>
This option is particularly suitable if the application needs to
use several connections in mixed order.
+ </para>
+
+ <para>
+ If your application uses multiple threads of execution, they cannot share a
+ connection concurrently. You must either explicitly control access to the connection
+ (using mutexes) or use a connection for each thread. If each thread uses its own connection,
+ you will need to use the AT clause to specify which connection the thread will use.
</para>
<para>