Currently I am running virtual domains using the pasted config below. I need to find a way to do this without running the concat in the mysql command. It is causing major issues with mysql since it does not handle concat in the where clause properly. Does anyone have a better way? 
<br><br><br>map_library_opt &quot;hostname:3306:database:table:username:password:servername:concat(user,\&#39;@\&#39;,domain):port&quot;<br>