+% if ( $conf->exists('cust_main-default_agent_custid') ) {
+% $sortby=\*display_custnum_sort;
+% $orderby = "ORDER BY CASE WHEN agent_custid IS NOT NULL AND agent_custid != '' THEN CAST(agent_custid AS BIGINT) ELSE custnum END";
+% } else {
+% $sortby=\*custnum_sort;
+% $orderby = "ORDER BY custnum";
+% }