col object_name format a20
col mode_held format a10
col mode_requested format a10
col lock_type format a12 heading 'Lock Type'
col holding_session format 999999 heading 'holder'
col waiting_session format 999999 heading 'waiter'
select holding_session,
waiting_session,
lock_type,
mode_held,
mode_requested,
lock_id1,
lock_id2
from sys.dba_waiters w
/