--- mqtt/etc/mqtt_pub.sql	2011/11/24 13:28:37	1.1.2.3
+++ mqtt/etc/mqtt_pub.sql	2011/11/24 13:57:11	1.1.2.4
@@ -16,6 +16,7 @@ PubHost varchar(64) not null,
 Stamp timestamp);
 CREATE INDEX RemoteHost on Online (RemoteHost);
 CREATE INDEX Username on Online (Username);
+CREATE UNIQUE INDEX User on Online (Username, RemoteHost);
 CREATE INDEX PubDate on Topics (PubDate);
 CREATE INDEX PubHost on Topics (PubHost);
 CREATE INDEX PubUser on Topics (PubUser);