select sess.sid, 
       sess.serial#, 
       lo.oracle_username, 
       lo.os_user_name, 
       ao.object_name, 
       lo.locked_mode 
  from v$locked_object lo, dba_objects ao, v$session sess, v$process p 
where ao.object_id = lo.object_id 
   and lo.session_id = sess.sid
   and object_name = 'MOV_MSTR'