代码上线前审核，某银行理财系统一条update执行了一个多小时……
改写前的SQL以及执行计划
update fnc.t1_cust_sign_info s
set s.is_wealth =
(select case
when ttt.total_amt >=
(select sp.paravalue
from fnc.sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000007') then
'2'
when ttt.total_amt <
(select sp.paravalue
from fnc.sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000007') and
ttt.total_amt >=
(select sp.paravalue
from fnc.sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000006') then
'0'
else
s.is_wealth
end
from (select t2.cust_no, sum(t2.app_amt) total_amt
from (select /*+ index(t idx_kf2_1 )*/t.cust_no,
t.app_amt * nvl(cur.standard_price, 1) app_amt
from fnc.t5_cust_trans_log t
left join (SELECT f2.foreign_cur,f2.standard_price
FROM (SELECT f1.foreign_cur, f1.file_time, f1.standard_price,
MAX(f1.file_time)over(partition BY f1.foreign_cur ) max_file_time
FROM fnc.t5_foreign_cur f1) f2
WHERE f2.file_time = f2.max_file_time)cur
on cur.foreign_cur = t.cur
where t.busi_code in ('130', '122')
and t.trans_status = '0'--测试阶段改为'0',线上要改成'3'
and t.cust_type = '3'
union all
select /*+ index(t idx_kf2_2 )*/t.cust_no,
t.total_vol * nvl(p.nav, 1) * nvl(cur.standard_price, 1) app_amt
from fnc.t5_cust_vol t --与表t1_cust_info关联列 cust_no需要创建索引
left join fnc.t5_prod_info p
on p.prod_code = t.prod_code
left join (SELECT f2.foreign_cur,f2.standard_price
FROM (SELECT f1.foreign_cur, f1.file_time, f1.standard_price,
MAX(f1.file_time)over(partition BY f1.foreign_cur ) max_file_time
FROM fnc.t5_foreign_cur f1) f2
WHERE f2.file_time = f2.max_file_time)cur
on cur.foreign_cur = p.prod_currency
left join fnc.t1_cust_info c
on c.cust_no = t.cust_no
where c.cust_type = '3') t2
group by t2.cust_no) ttt
where ttt.cust_no = s.cust_no)
where exists (select 1
from (select t.cust_no, t.app_amt
from fnc.t5_cust_trans_log t
where t.busi_code in ('130', '122')
and t.trans_status = '0'--测试阶段改为'0',线上要改成'3'
and t.cust_type = '3') t2
where t2.cust_no = s.cust_no);
PLAN_TABLE_OUTPUT
----------------------------------------------------------------------------------------------------------------
Plan hash value: 2887642830
---------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------------------------
| 0 | UPDATE STATEMENT | | 4252 | 116K| 27M (1)| 91:17:25 |
| 1 | UPDATE | T1_CUST_SIGN_INFO | | | | |
|* 2 | HASH JOIN RIGHT SEMI | | 4252 | 116K| 4185 (1)| 00:00:51 |
| 3 | INLIST ITERATOR | | | | | |
|* 4 | TABLE ACCESS BY INDEX ROWID | T5_CUST_TRANS_LOG | 2962 | 50354 | 2882 (1)| 00:00:35 |
|* 5 | INDEX RANGE SCAN | IX_T5_CUST_TRANS_LOG_02 | 3543 | | 68 (0)| 00:00:01 |
| 6 | TABLE ACCESS FULL | T1_CUST_SIGN_INFO | 1337K| 14M| 1296 (2)| 00:00:16 |
| 7 | VIEW | | 2 | 46 | 6439 (1)| 00:01:18 |
| 8 | SORT GROUP BY | | 2 | 44 | 6439 (1)| 00:01:18 |
| 9 | VIEW | | 768 | 16896 | 6439 (1)| 00:01:18 |
| 10 | UNION-ALL | | | | | |
|* 11 | HASH JOIN OUTER | | 388 | 30264 | 2987 (1)| 00:00:36 |
| 12 | INLIST ITERATOR | | | | | |
|* 13 | TABLE ACCESS BY INDEX ROWID | T5_CUST_TRANS_LOG | 1 | 25 | 2882 (1)| 00:00:35 |
|* 14 | INDEX RANGE SCAN | IX_T5_CUST_TRANS_LOG_02 | 3543 | | 68 (0)| 00:00:01 |
|* 15 | VIEW | | 9952 | 515K| 105 (2)| 00:00:02 |
| 16 | WINDOW SORT | | 9952 | 281K| 105 (2)| 00:00:02 |
| 17 | TABLE ACCESS FULL | T5_FOREIGN_CUR | 9952 | 281K| 103 (0)| 00:00:02 |
|* 18 | HASH JOIN OUTER | | 380 | 42940 | 3452 (1)| 00:00:42 |
| 19 | NESTED LOOPS OUTER | | 1 | 60 | 3347 (1)| 00:00:41 |
| 20 | NESTED LOOPS | | 1 | 38 | 3345 (1)| 00:00:41 |
|* 21 | TABLE ACCESS BY INDEX ROWID| T1_CUST_INFO | 1 | 11 | 3 (0)| 00:00:01 |
|* 22 | INDEX UNIQUE SCAN | PK_T1_CUST_INFO | 1 | | 2 (0)| 00:00:01 |
|* 23 | TABLE ACCESS FULL | T5_CUST_VOL | 1 | 27 | 3342 (1)| 00:00:41 |
| 24 | TABLE ACCESS BY INDEX ROWID | T5_PROD_INFO | 1 | 22 | 2 (0)| 00:00:01 |
|* 25 | INDEX RANGE SCAN | PK_T5_PROD_INFO | 1 | | 1 (0)| 00:00:01 |
|* 26 | VIEW | | 9952 | 515K| 105 (2)| 00:00:02 |
| 27 | WINDOW SORT | | 9952 | 281K| 105 (2)| 00:00:02 |
| 28 | TABLE ACCESS FULL | T5_FOREIGN_CUR | 9952 | 281K| 103 (0)| 00:00:02 |
| 29 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | 1 (0)| 00:00:01 |
|* 30 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | 0 (0)| 00:00:01 |
| 31 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | 1 (0)| 00:00:01 |
|* 32 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | 0 (0)| 00:00:01 |
| 33 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | 1 (0)| 00:00:01 |
|* 34 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | 0 (0)| 00:00:01 |
---------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("T"."CUST_NO"="S"."CUST_NO")
4 - filter("T"."CUST_NO" IS NOT NULL AND "T"."CUST_TYPE"='3')
5 - access(("T"."BUSI_CODE"='122' OR "T"."BUSI_CODE"='130') AND "T"."TRANS_STATUS"='0')
11 - access("F2"."FOREIGN_CUR"(+)="T"."CUR")
13 - filter("T"."CUST_NO"=:B1 AND "T"."CUST_TYPE"='3')
14 - access(("T"."BUSI_CODE"='122' OR "T"."BUSI_CODE"='130') AND "T"."TRANS_STATUS"='0')
15 - filter("F2"."FILE_TIME"(+)="F2"."MAX_FILE_TIME"(+))
18 - access("F2"."FOREIGN_CUR"(+)="P"."PROD_CURRENCY")
21 - filter("C"."CUST_TYPE"='3')
22 - access("C"."CUST_NO"=:B1)
23 - filter("T"."CUST_NO"=:B1 AND "C"."CUST_NO"="T"."CUST_NO")
25 - access("P"."PROD_CODE"(+)="T"."PROD_CODE")
26 - filter("F2"."FILE_TIME"(+)="F2"."MAX_FILE_TIME"(+))
30 - access("SP"."PARAID"='60000007' AND "SP"."MODULEID"='5')
32 - access("SP"."PARAID"='60000007' AND "SP"."MODULEID"='5')
34 - access("SP"."PARAID"='60000006' AND "SP"."MODULEID"='5')使用脚本（我前面的博客里面有脚本代码 https://blog.csdn.net/Skybig1988/article/details/81330204）获取执行计划中相关表和索引的信息
OWNER OBJECT_TYPE OBJECT_NAME ALIAS PAR SIZE_MB NUM_ROWS ESTIMATE_P LAST_ANALYZE STA
---------- -------------------- ------------------------------ ---------------------------------------- --- ---------- ---------- ---------- ------------ ---
FNC TABLE SYS_PARAM SP | SP | SP NO .0625 77 100% 30-SEP-16 NO
FNC TABLE T1_CUST_INFO C NO 299 1297140 100% 19-JUL-16 NO
FNC TABLE T1_CUST_SIGN_INFO C | S NO 37 1337492 100% 30-SEP-16 NO
FNC TABLE T5_CUST_TRANS_LOG T | T NO 216 6342 100% 30-SEP-16 YES
FNC TABLE T5_CUST_VOL T NO 96 528534 100% 30-SEP-16 NO
FNC TABLE T5_FOREIGN_CUR F1 | F1 NO 3 9952 100% 09-SEP-16 NO
FNC TABLE T5_PROD_INFO P NO 5 14497 100% 30-SEP-16 NO
FNC INDEX IX_T5_CUST_TRANS_LOG_02 NOALIAS | NOALIAS NO 28 6345 100% 30-SEP-16 YES
FNC INDEX (UNIQUE) PK_SYS_PARAM NOALIAS | NOALIAS | NOALIAS NO .0625 77 100% 30-SEP-16 NO
SQL> SELECT COUNT(1) FROM T5_CUST_TRANS_LOG;
COUNT(1)
----------
7511
改写后的SQL以及执行计划
merge into t1_cust_sign_info c
using (select distinct a.rid,a.cust_no,
case
when b.total_amt >=
(select sp.paravalue
from sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000007') then
'2'
when b.total_amt <
(select sp.paravalue
from sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000007') and
b.total_amt >=
(select sp.paravalue
from sys_param sp
where sp.moduleid = '5'
and sp.paraid = '60000006') then
'0'
else
a.is_wealth
end as is_wealth
from ( select s.rowid rid, s.cust_no,s.is_wealth
from t1_cust_sign_info s, t5_cust_trans_log t
where s.cust_no = t.cust_no
and t.busi_code in ('130', '122')
and t.trans_status = '0'--测试阶段改为'0',线上要改成'3'
and t.cust_type = '3') a
left join (select t2.cust_no, sum(t2.app_amt) total_amt
from (select t.cust_no,
t.app_amt * nvl(cur.standard_price, 1) app_amt
from t5_cust_trans_log t
left join (SELECT f2.foreign_cur,f2.standard_price
FROM (SELECT f1.foreign_cur, f1.file_time, f1.standard_price,
MAX(f1.file_time)over(partition BY f1.foreign_cur ) max_file_time
FROM t5_foreign_cur f1) f2
WHERE f2.file_time = f2.max_file_time)cur
on cur.foreign_cur = t.cur
where t.busi_code in ('130', '122')
and t.trans_status = '0'--测试阶段改为'0',线上要改成'3'
and t.cust_type = '3'
union all
select t.cust_no,
t.total_vol * nvl(p.nav, 1) * nvl(cur.standard_price, 1) app_amt
from t5_cust_vol t --与表t1_cust_info关联列 cust_no需要创建索引
left join t5_prod_info p
on p.prod_code = t.prod_code
left join (SELECT f2.foreign_cur,f2.standard_price
FROM (SELECT f1.foreign_cur, f1.file_time, f1.standard_price,
MAX(f1.file_time)over(partition BY f1.foreign_cur ) max_file_time
FROM t5_foreign_cur f1) f2
WHERE f2.file_time = f2.max_file_time)cur
on cur.foreign_cur = p.prod_currency
left join t1_cust_info c
on c.cust_no = t.cust_no
where c.cust_type = '3') t2
group by t2.cust_no) b
on a.cust_no = b.cust_no ) d
on(d.rid = c.rowid)
when matched then
update set c.is_wealth = d.is_wealth;
4570 rows merged.
Elapsed: 00:00:05.40
PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------------------
Plan hash value: 966278225
---------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------------------------------------
| 0 | MERGE STATEMENT | | 2962 | 11848 | | 33791 (2)| 00:06:46 |
| 1 | MERGE | T1_CUST_SIGN_INFO | | | | | |
| 2 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | | 1 (0)| 00:00:01 |
|* 3 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | | 0 (0)| 00:00:01 |
| 4 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | | 1 (0)| 00:00:01 |
|* 5 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | | 0 (0)| 00:00:01 |
| 6 | TABLE ACCESS BY INDEX ROWID | SYS_PARAM | 1 | 15 | | 1 (0)| 00:00:01 |
|* 7 | INDEX UNIQUE SCAN | PK_SYS_PARAM | 1 | | | 0 (0)| 00:00:01 |
| 8 | VIEW | | | | | | |
|* 9 | HASH JOIN | | 2962 | 118K| | 33791 (2)| 00:06:46 |
| 10 | VIEW | | 2962 | 62202 | | 32484 (1)| 00:06:30 |
| 11 | SORT UNIQUE | | 2962 | 170K| | 32484 (1)| 00:06:30 |
|* 12 | HASH JOIN OUTER | | 2962 | 170K| | 32483 (1)| 00:06:30 |
|* 13 | HASH JOIN | | 2962 | 107K| | 4185 (1)| 00:00:51 |
| 14 | INLIST ITERATOR | | | | | | |
|* 15 | TABLE ACCESS BY INDEX ROWID | T5_CUST_TRANS_LOG | 2962 | 50354 | | 2882 (1)| 00:00:35 |
|* 16 | INDEX RANGE SCAN | IX_T5_CUST_TRANS_LOG_02 | 3543 | | | 68 (0)| 00:00:01 |
| 17 | TABLE ACCESS FULL | T1_CUST_SIGN_INFO | 1337K| 25M| | 1296 (2)| 00:00:16 |
| 18 | VIEW | | 344K| 7397K| | 28295 (2)| 00:05:40 |
| 19 | SORT GROUP BY | | 344K| 7397K| 95M| 28295 (2)| 00:05:40 |
| 20 | VIEW | | 3104K| 65M| | 19434 (1)| 00:03:54 |
| 21 | UNION-ALL | | | | | | |
|* 22 | HASH JOIN OUTER | | 1650K| 122M| | 2996 (1)| 00:00:36 |
| 23 | INLIST ITERATOR | | | | | | |
|* 24 | TABLE ACCESS BY INDEX ROWID| T5_CUST_TRANS_LOG | 3348 | 83700 | | 2882 (1)| 00:00:35 |
|* 25 | INDEX RANGE SCAN | IX_T5_CUST_TRANS_LOG_02 | 3543 | | | 68 (0)| 00:00:01 |
|* 26 | VIEW | | 9952 | 515K| | 105 (2)| 00:00:02 |
| 27 | WINDOW SORT | | 9952 | 281K| | 105 (2)| 00:00:02 |
| 28 | TABLE ACCESS FULL | T5_FOREIGN_CUR | 9952 | 281K| | 103 (0)| 00:00:02 |
|* 29 | HASH JOIN RIGHT OUTER | | 1453K| 156M| | 16438 (1)| 00:03:18 |
|* 30 | VIEW | | 9952 | 515K| | 105 (2)| 00:00:02 |
| 31 | WINDOW SORT | | 9952 | 281K| | 105 (2)| 00:00:02 |
| 32 | TABLE ACCESS FULL | T5_FOREIGN_CUR | 9952 | 281K| | 103 (0)| 00:00:02 |
|* 33 | HASH JOIN RIGHT OUTER | | 528K| 30M| | 16325 (1)| 00:03:16 |
| 34 | TABLE ACCESS FULL | T5_PROD_INFO | 14497 | 311K| | 175 (1)| 00:00:03 |
|* 35 | HASH JOIN | | 528K| 19M| 19M| 16147 (1)| 00:03:14 |
| 36 | TABLE ACCESS FULL | T5_CUST_VOL | 528K| 13M| | 3341 (1)| 00:00:41 |
|* 37 | TABLE ACCESS FULL | T1_CUST_INFO | 1293K| 13M| | 10404 (1)| 00:02:05 |
| 38 | TABLE ACCESS FULL | T1_CUST_SIGN_INFO | 1337K| 25M| | 1299 (2)| 00:00:16 |
---------------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
3 - access("SP"."PARAID"='60000007' AND "SP"."MODULEID"='5')
5 - access("SP"."PARAID"='60000007' AND "SP"."MODULEID"='5')
7 - access("SP"."PARAID"='60000006' AND "SP"."MODULEID"='5')
9 - access("D"."RID"="C".ROWID)
12 - access("S"."CUST_NO"="B"."CUST_NO"(+))
13 - access("S"."CUST_NO"="T"."CUST_NO")
15 - filter("T"."CUST_NO" IS NOT NULL AND "T"."CUST_TYPE"='3')
16 - access(("T"."BUSI_CODE"='122' OR "T"."BUSI_CODE"='130') AND "T"."TRANS_STATUS"='0')
22 - access("F2"."FOREIGN_CUR"(+)="T"."CUR")
24 - filter("T"."CUST_TYPE"='3')
25 - access(("T"."BUSI_CODE"='122' OR "T"."BUSI_CODE"='130') AND "T"."TRANS_STATUS"='0')
26 - filter("F2"."FILE_TIME"(+)="F2"."MAX_FILE_TIME"(+))
29 - access("F2"."FOREIGN_CUR"(+)="P"."PROD_CURRENCY")
30 - filter("F2"."FILE_TIME"(+)="F2"."MAX_FILE_TIME"(+))
33 - access("P"."PROD_CODE"(+)="T"."PROD_CODE")
35 - access("C"."CUST_NO"="T"."CUST_NO")
37 - filter("C"."CUST_TYPE"='3')
66 rows selected.优化后 5秒执行完 而原来执行一个小时都不出结果！！！