-- scopes: create views

create or replace view messages_current as
  select trackid, domain, action, class, item, timestamp, data
    from messages m1
    where trackid = (select max(trackid) from messages m2
	  where m2.domain = m1.domain and m2.action = m1.action
	    and m2.class = m1.class and m2.item = m1.item);