select
xidusn, -- XIDUSN NUMBER
xidslot, -- XIDSLOT NUMBER
xidsqn, -- XIDSQN NUMBER
object_id, -- OBJECT_ID NUMBER
session_id, -- SESSION_ID NUMBER
oracle_username, -- ORACLE_USERNAME VARCHAR2(30)
os_user_name, -- OS_USER_NAME VARCHAR2(30)
process, -- PROCESS VARCHAR2(24)
locked_mode -- LOCKED_MODE NUMBER
from
gv$locked_object
where
inst_id = USERENV('Instance')