问题：有如下的sql性能差：
select rowid,PKG_LIFE_QUERY_FUNC.F_GET_DEPOSIT_ACCOUNT_VALUE(DEPOSIT_ID,ACCOUNT_CODE) as ACCOUNT_VALUE,PKG_LIFE_QUERY_FUNC.F_GET_DEPOSIT_ACCOUNT_VALUE(DEPOSIT_ID,ACCOUNT_CODE) as ACCOUNT_VALUE,a.* from V_CUST_DEPOSIT_LIST a where ( account_code=´27902´)
V_CUST_DEPOSIT_LIST 是一个视图如下：
create or replace view v_cust_deposit_list as
select row_number() over(order by tcdl.account_code,
trunc(tcdl.deposit_date), to_number(decode(tcd.distri_type,
´1´, 1, ´2´, 5, ´3´, decode(tpf.fee_type, 169, 2, 69, 6),
´10´, 3, ´71´, 4, ´8´, 9, 8))) rn,tcdl.*
from t_cust_deposit_list tcdl,
t_capital_distribute tcd,
t_product_fee tpf
where tcdl.capital_id = tcd.capital_id(+)
and tcd.prem_id = tpf.list_id(+)
order by tcdl.account_code,
trunc(tcdl.deposit_date),
to_number(decode(tcd.distri_type,´1´,1,´2´,5,´3´,
decode(tpf.fee_type, 169, 2, 69, 6),´10´,3,´71´,4,´8´,9,8));
在t_cust_deposit_list有account_code;
原因：由于在视图上含有row_number分析函数，所以没法走索引：把语句改为：
select rowid,
PKG_LIFE_QUERY_FUNC.F_GET_DEPOSIT_ACCOUNT_VALUE(DEPOSIT_ID,ACCOUNT_CODE) as ACCOUNT_VALUE,
PKG_LIFE_QUERY_FUNC.F_GET_DEPOSIT_ACCOUNT_VALUE(DEPOSIT_ID,ACCOUNT_CODE) as ACCOUNT_VALUE,
a.*
from (
select row_number() over (order by tcdl.account_code,trunc(tcdl.deposit_date),to_number(decode(tcd.distri_type,´1´,1,´3´,decode(tpf.fee_type,169,2,69,5),´10´,3,´71´,4,´2´,9,8))) rn,tcdl.*
from
(select tcd2.* from t_cust_deposit_list tcd2
where tcd2.account_code=´27902´) tcdl,t_capital_distribute tcd,t_product_fee tpf
where tcdl.capital_id = tcd.capital_id(+) and tcd.prem_id = tpf.list_id(+)
order by tcdl.account_code,trunc(tcdl.deposit_date),to_number(decode(tcd.distri_type,´1´,1,´3´,decode(tpf.fee_type,169,2,69,5),´10´,3,´71´,4,´2´,9,8))
) a
