select oracle_username || ' (' || s.osuser || ')' username , s.sid || ',' || s.serial# sess_id  ,  owner || '.' || object_name object ,  object_type ,decode( l.block ,0, 'Not Blocking',1, 'Blocking', 2, 'Global') status , decode(v.locked_mode,0, 'None' , 1, 'Null' ,2, 'Row-S (SS)'  , 3, 'Row-X (SX)' , 4, 'Share',5, 'S/Row-X (SSX)' , 6, 'Exclusive', TO_CHAR(lmode)) mode_held  
from       v$locked_object v   ,  dba_objects d   ,  v$lock l   ,  v$session s  
where      v.object_id = d.object_id  
and        v.object_id = l.id1  
and        v.session_id = s.sid  
order by oracle_username   ,  session_id ;