PLSQL Developer执行sql没有响应,Oracle表被锁定

--oracle中查看表是否被锁
SELECT /*+ rule*/
 a.sid, b.owner, object_name, object_type
  FROM v$lock a, all_objects b
 WHERE TYPE = 'TM'
   and a.id1 = b.object_id;
--查到被锁的表杀掉 
SELECT sid, serial# FROM v$session WHERE sid = &sid;
alter system kill session 'sid,serial#';