报表程序中的一段SQL运行很慢，代码如下：
优化前：
耗时：1337s
INSERT INTO PER_LTE_ZIB_PB_COMMISSION_07
SELECT P.TOPACTUALID,
Q.POLICYNO,
Q.ENDORSEMENTNO,
CASE
WHEN Q.ENDORSEMENTSTATUS = '$$900002107001' THEN
'1'
ELSE
NULL
END AS ENDORSE_CFLAG,
P.ROLEID,
P.OURFLAG,
P.HOSTFLAG,
P.AMOUNTOFPOLICYISSUINGFEES AS AMOUNTOFPOLICYISSUINGFEES,
P.UWCODE,
P.UWNAME,
'04' AS DATATYPE,
P.CURRENCYCODE,
T3.TOPACTUALID AS NEXTTOPACTUALID,
P.PAYEE,
P.PAYEENAME
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
LEFT JOIN (SELECT POLICYNO,
'0' AS ENDORSEMENTNO,
TOPACTUALID,
POLICYID,
NULL AS ENDORSEMENTSTATUS
FROM RPT_ST.POLICY
WHERE POLICYNO IS NOT NULL
AND ENDORSEMENTID IS NULL
AND POLICYSTATUS IS NOT NULL
UNION ALL
SELECT T1.POLICYNO,
T2.ENDORSEMENTNO,
T1.TOPACTUALID,
POLICYID,
T2.ENDORSEMENTSTATUS
FROM RPT_ST.POLICY T1
LEFT JOIN RPT_ST.ENDORSEMENT T2
ON T1.ENDORSEMENTID = T2.ENDORSEMENTID
WHERE T1.POLICYNO IS NOT NULL
AND T2.ENDORSEMENTNO IS NOT NULL
AND POLICYSTATUS IS NOT NULL
AND T2.ENDORSEMENTSTATUS <> '$$900002107001') Q
ON P.TOPACTUALID = Q.TOPACTUALID
LEFT JOIN (SELECT S.TOPACTUALID,
S.POLICYID,
S.POLICYSTATUS,
NULL AS PREPOLICYID
FROM RPT_ST.POLICY S
WHERE POLICYNO IS NOT NULL
AND ENDORSEMENTID IS NULL
AND POLICYSTATUS IS NOT NULL
UNION ALL
SELECT T1.TOPACTUALID,
T1.POLICYID,
T1.POLICYSTATUS,
T2.PREPOLICYID
FROM RPT_ST.POLICY T1
LEFT JOIN RPT_ST.ENDORSEMENT T2
ON T1.ENDORSEMENTID = T2.ENDORSEMENTID
WHERE T1.POLICYNO IS NOT NULL
AND T2.ENDORSEMENTNO IS NOT NULL
AND POLICYSTATUS IS NOT NULL
AND T2.ENDORSEMENTSTATUS <> '$$900002107001') T3
ON Q.POLICYID = T3.PREPOLICYID
AND T3.POLICYSTATUS IS NOT NULL
WHERE P.TOPACTUALID IN
(SELECT TOPACTUALID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011')
AND P.ROLEID NOT IN
(SELECT ROLEID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011')
AND Q.POLICYNO IS NOT NULL
Plan hash value: 21661008
---------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Inst |IN-OUT|
---------------------------------------------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | | | 9145 (100)| | | |
|* 1 | FILTER | | | | | | | |
|* 2 | HASH JOIN SEMI | | 1 | 451 | 8782 (1)| 00:01:46 | | |
|* 3 | HASH JOIN | | 2 | 854 | 8418 (1)| 00:01:42 | | |
|* 4 | HASH JOIN OUTER | | 1 | 260 | 8056 (1)| 00:01:37 | | |
| 5 | VIEW | | 1 | 192 | 4028 (1)| 00:00:49 | | |
| 6 | UNION-ALL | | | | | | | |
| 7 | REMOTE | POLICY | 1 | 143 | 4028 (1)| 00:00:49 | ENOLC | R->S |
| 8 | REMOTE | | | | | | ENOLC | R->S |
| 9 | VIEW | | 1 | 68 | 4028 (1)| 00:00:49 | | |
| 10 | UNION-ALL | | | | | | | |
| 11 | REMOTE | POLICY | 1 | 130 | 4028 (1)| 00:00:49 | ENOLC | R->S |
| 12 | REMOTE | | | | | | ENOLC | R->S |
| 13 | TABLE ACCESS FULL| PER_LTE_ZIB_PB_COMMISSION_06 | 65448 | 10M| 361 (1)| 00:00:05 | | |
|* 14 | TABLE ACCESS FULL | PER_LTE_ZIB_PB_COMMISSION_06 | 654 | 15696 | 363 (2)| 00:00:05 | | |
|* 15 | TABLE ACCESS FULL | PER_LTE_ZIB_PB_COMMISSION_06 | 1 | 24 | 363 (2)| 00:00:05 | | |
---------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter( IS NULL)
2 - access("P"."TOPACTUALID"="TOPACTUALID")
3 - access("P"."TOPACTUALID"="Q"."TOPACTUALID")
4 - access("Q"."POLICYID"="T3"."PREPOLICYID")
14 - filter("P"."OURFLAG"||NVL("P"."HOSTFLAG",'0')='$$1000090000011')
15 - filter(("P"."OURFLAG"||NVL("P"."HOSTFLAG",'0')='$$1000090000011' AND LNNVL("ROLEID"<>:B1)))分析
分析SQL代码，其中where 条件中有NOT IN（select roleid from per..）子查询。
去掉not in子查询，进行查询，能在3s内结果，由此该SQL性能瓶颈就出在NOT IN子查询上。
而NOT IN子查询，可以等价改写成left join，改写形式如下：
P.ROLEID NOT IN
(SELECT ROLEID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011')
改写成：
LEFT JOIN (SELECT ROLEID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011') D
ON D.ROLEID=P.ROLEID
where D.ROLEID IS NULL
整体改下SQL如下：
INSERT INTO PER_LTE_ZIB_PB_COMMISSION_07
SELECT P.TOPACTUALID,
Q.POLICYNO,
Q.ENDORSEMENTNO,
CASE
WHEN Q.ENDORSEMENTSTATUS = '$$900002107001' THEN
'1'
ELSE
NULL
END AS ENDORSE_CFLAG,
P.ROLEID,
P.OURFLAG,
P.HOSTFLAG,
P.AMOUNTOFPOLICYISSUINGFEES AS AMOUNTOFPOLICYISSUINGFEES,
P.UWCODE,
P.UWNAME,
'04' AS DATATYPE,
P.CURRENCYCODE,
T3.TOPACTUALID AS NEXTTOPACTUALID,
P.PAYEE,
P.PAYEENAME
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
LEFT JOIN (SELECT POLICYNO,
'0' AS ENDORSEMENTNO,
TOPACTUALID,
POLICYID,
NULL AS ENDORSEMENTSTATUS
FROM RPT_ST.POLICY
WHERE POLICYNO IS NOT NULL
AND ENDORSEMENTID IS NULL
AND POLICYSTATUS IS NOT NULL
UNION ALL
SELECT T1.POLICYNO,
T2.ENDORSEMENTNO,
T1.TOPACTUALID,
POLICYID,
T2.ENDORSEMENTSTATUS
FROM RPT_ST.POLICY T1
LEFT JOIN RPT_ST.ENDORSEMENT T2
ON T1.ENDORSEMENTID = T2.ENDORSEMENTID
WHERE T1.POLICYNO IS NOT NULL
AND T2.ENDORSEMENTNO IS NOT NULL
AND POLICYSTATUS IS NOT NULL
AND T2.ENDORSEMENTSTATUS <> '$$900002107001') Q
ON P.TOPACTUALID = Q.TOPACTUALID
LEFT JOIN (SELECT S.TOPACTUALID,
S.POLICYID,
S.POLICYSTATUS,
NULL AS PREPOLICYID
FROM RPT_ST.POLICY S
WHERE POLICYNO IS NOT NULL
AND ENDORSEMENTID IS NULL
AND POLICYSTATUS IS NOT NULL
UNION ALL
SELECT T1.TOPACTUALID,
T1.POLICYID,
T1.POLICYSTATUS,
T2.PREPOLICYID
FROM RPT_ST.POLICY T1
LEFT JOIN RPT_ST.ENDORSEMENT T2
ON T1.ENDORSEMENTID = T2.ENDORSEMENTID
WHERE T1.POLICYNO IS NOT NULL
AND T2.ENDORSEMENTNO IS NOT NULL
AND POLICYSTATUS IS NOT NULL
AND T2.ENDORSEMENTSTATUS <> '$$900002107001') T3
ON Q.POLICYID = T3.PREPOLICYID
AND T3.POLICYSTATUS IS NOT NULL
LEFT JOIN (SELECT ROLEID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011') D
ON D.ROLEID=P.ROLEID
WHERE P.TOPACTUALID IN
(SELECT TOPACTUALID
FROM PER_LTE_ZIB_PB_COMMISSION_06 P
WHERE P.OURFLAG || NVL(P.HOSTFLAG, 0) = '$$1000090000011')
AND Q.POLICYNO IS NOT NULL
AND D.ROLEID IS NULL
----------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Inst |IN-OUT|
----------------------------------------------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 1 | 475 | 9145 (1)| 00:01:50 | | |
|* 1 | HASH JOIN SEMI | | 1 | 475 | 9145 (1)| 00:01:50 | | |
|* 2 | FILTER | | | | | | | |
|* 3 | HASH JOIN OUTER | | 1 | 451 | 8781 (1)| 00:01:46 | | |
|* 4 | HASH JOIN | | 2 | 854 | 8418 (1)| 00:01:42 | | |
|* 5 | HASH JOIN OUTER | | 1 | 260 | 8056 (1)| 00:01:37 | | |
| 6 | VIEW | | 1 | 192 | 4028 (1)| 00:00:49 | | |
| 7 | UNION-ALL | | | | | | | |
| 8 | REMOTE | POLICY | 1 | 143 | 4028 (1)| 00:00:49 | ENOLC | R->S |
| 9 | REMOTE | | | | | | ENOLC | R->S |
| 10 | VIEW | | 1 | 68 | 4028 (1)| 00:00:49 | | |
| 11 | UNION-ALL | | | | | | | |
| 12 | REMOTE | POLICY | 1 | 130 | 4028 (1)| 00:00:49 | ENOLC | R->S |
| 13 | REMOTE | | | | | | ENOLC | R->S |
| 14 | TABLE ACCESS FULL| PER_LTE_ZIB_PB_COMMISSION_06 | 65448 | 10M| 361 (1)| 00:00:05 | | |
|* 15 | TABLE ACCESS FULL | PER_LTE_ZIB_PB_COMMISSION_06 | 654 | 15696 | 363 (2)| 00:00:05 | | |
|* 16 | TABLE ACCESS FULL | PER_LTE_ZIB_PB_COMMISSION_06 | 654 | 15696 | 363 (2)| 00:00:05 | | |
----------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("P"."TOPACTUALID"="TOPACTUALID")
2 - filter("ROLEID" IS NULL)
3 - access("ROLEID"(+)="P"."ROLEID")
4 - access("P"."TOPACTUALID"="Q"."TOPACTUALID")
5 - access("Q"."POLICYID"="T3"."PREPOLICYID"(+))
15 - filter("P"."OURFLAG"(+)||NVL("P"."HOSTFLAG"(+),'0')='$$1000090000011')
16 - filter("P"."OURFLAG"||NVL("P"."HOSTFLAG",'0')='$$1000090000011')
Remote SQL Information (identified by operation id):
----------------------------------------------------
8 - SELECT "POLICYID","POLICYNO","POLICYSTATUS","TOPACTUALID","ENDORSEMENTID" FROM "CUAN_DOIC"."POLICY"
"POLICY" WHERE "ENDORSEMENTID" IS NULL AND "POLICYNO" IS NOT NULL AND "POLICYSTATUS" IS NOT NULL (accessing
'ENOLC' )
9 - EXPLAIN PLAN INTO PLAN_TABLE@! FOR SELECT "A2"."POLICYNO","A1"."ENDORSEMENTNO","A2"."TOPACTUALID","A2".
"POLICYID","A1"."ENDORSEMENTSTATUS" FROM "CUAN_DOIC"."POLICY" "A2","CUAN_DOIC"."ENDORSEMENT" "A1" WHERE
"A2"."POLICYNO" IS NOT NULL AND "A1"."ENDORSEMENTNO" IS NOT NULL AND "A2"."POLICYSTATUS" IS NOT NULL AND
"A1"."ENDORSEMENTSTATUS"<>'$$900002107001' AND "A2"."ENDORSEMENTID"="A1"."ENDORSEMENTID" AND "A2"."POLICYNO"
IS NOT NULL (accessing 'ENOLC' )
12 - SELECT "POLICYNO","POLICYSTATUS","TOPACTUALID","ENDORSEMENTID" FROM "CUAN_DOIC"."POLICY" "S" WHERE
"ENDORSEMENTID" IS NULL AND "POLICYNO" IS NOT NULL AND "POLICYSTATUS" IS NOT NULL (accessing 'ENOLC' )
13 - EXPLAIN PLAN INTO PLAN_TABLE@! FOR SELECT "A2"."TOPACTUALID","A2"."POLICYID","A2"."POLICYSTATUS","A1"."
PREPOLICYID" FROM "CUAN_DOIC"."POLICY" "A2","CUAN_DOIC"."ENDORSEMENT" "A1" WHERE "A2"."POLICYNO" IS NOT NULL
AND "A1"."ENDORSEMENTNO" IS NOT NULL AND "A2"."POLICYSTATUS" IS NOT NULL AND
"A1"."ENDORSEMENTSTATUS"<>'$$900002107001' AND "A2"."ENDORSEMENTID"="A1"."ENDORSEMENTID" AND
"A2"."POLICYSTATUS" IS NOT NULL (accessing 'ENOLC' ) 优化后
耗时：4s