postgresql7.2 select message_key, message, deleted_p from lang_messages where package_key = :package_key and locale = :locale and sync_time is not null union select lma1.message_key, lma1.old_message, lma1.deleted_p from lang_messages_audit lma1 where lma1.package_key = :package_key and lma1.locale = :locale and lma1.sync_time is not null and lma1.audit_id = (select max(lma2.audit_id) from lang_messages_audit lma2 where lma2.package_key = lma1.package_key and lma2.message_key = lma1.message_key and lma2.locale = :locale and lma2.sync_time is not null ) and not exists (select 1 from lang_messages where package_key = lma1.package_key and message_key = lma1.message_key and locale = :locale and sync_time is not null )