oracle死锁查询

select sess.sid ||','||   
    sess.serial#,  
    lo.oracle_username,   
    lo.os_user_name,   
    ao.object_name,   
    lo.locked_mode,  
        SESS.machine  
    from v$locked_object lo,   
    dba_objects ao,   
    v$session sess   
where ao.object_id = lo.object_id and lo.session_id = sess.sid ;