SQL查询在Oracle 9i中挂起

Question

select 'RATION ALL WITH CILQ' OM,
       a.p_no,
       b.rank_name,
       a.name,
       a.u_name,
       e.pa_code,
       d.descr,
       e.value,
       a.u_code,
       c.u_name,
       c.pay_grp,
       f.TRADE_ABBR,
       A.G_CODE,
       a.runing_pay,
       A.COMP
  from pj_pay_mas1       a,
       pj_rank           b,
       pj_unit           c,
       pj_payall         d,
       pj_perm_all_dedu1 e,
       PJ_TRADE          F
 where a.u_code = c.u_code
   and a.rank_code = b.rank_code
   and a.p_no = e.p_no
   and d.pa_code = e.pa_code
   and e.pa_code like '102%'
   AND nvl(A.TRADE_CODE, '000') = F.TRADE_CODE
   and a.stat_code = '01'
   and a.u_code = '21033'
   and a.p_no in (SELECT x.P_NO
                    FROM PJ_PERM_ALL_DEDU1 x
                   WHERE A.P_NO = x.P_NO
                     AND x.PA_CODE like '105%'
                     AND X.VALUE > 0)
   AND SUBSTR(E.PA_CODE, 6, 1) NOT IN ('2')
   AND E.VALUE > 0

我正在使用这个简单的查询，但它挂在我的本地PC上与本地数据库。但是当数据库在linux上时，同样的查询执行完美。我以前用linux连接的意思很完美。但是，当我使用本地数据库进行toad时，它会挂起并显示无响应。

为什么会这样？