select e from FeedEntry e where e.guid in :guids
select e from FeedEntry e where e.feed=:feed and not exists (select s from FeedEntryStatus s where s.entry = e and s.user =:user and s.read=true)
select e from FeedEntry e where e.feed=:feed and exists (select s from FeedEntryStatus s where s.entry = e and s.user =:user and s.read=true)