oracle表被锁（delete或update一直处于执行状态）的处理办法。

 --首先查看有哪些锁
 select /*+ rule */ s.username,
       decode(l.type,'TM','TABLE LOCK','TX','ROW LOCK',null) lock_level,
       o.owner,
       o.object_name,
       o.object_type,
       s.sid,s.serial#,
       s.terminal,
       s.machine,
       s.program,
       s.osuser
 from v$session s,v$lock l,dba_objects o
 where l.sid = s.sid
 and l.id1 = o.object_id(+)
 and s.username is not null

 --如果发生了锁等待，看是谁锁了表而引起谁的等待
 --以下的语句可以查询到谁锁了表，而谁在等待。 如果有子节点，则表示有等待发生
 select /*+ rule */ lpad(' ',decode(l.xidusn ,,,))||l.oracle_username user_name,
        o.owner,
        o.object_name,
        o.object_type,
        s.sid,
        s.serial#
 from v$locked_object l,dba_objects o,v$session s
 where l.object_id=o.object_id
 and l.session_id=s.sid
 order by o.object_id,xidusn desc

 --找到引起等待的session,杀掉该session:
 alter system kill session 'sid,serial#';

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