1539: cursor c is
1540: select distinct role user_name from
1541: (select begin_date, role from
1542: (select wi.begin_date begin_date, owner_role role 1543: from wf_items wi 1544: where wi.item_type = itemType
1545: and wi.item_key = itemKey
1546: and owner_role is not null
1547: union all