【发布时间】：2016-09-28 05:49:56
【问题描述】：
我有一个问题，如果存储过程的执行计划具有 IF ELSE 语句，其中基于 IN 参数的值执行 IF 或 ELSE 块并且块中的查询获取相同的值，如何创建它来自相同的表，但在 where 子句中具有不同的列。
据我所知，每个存储过程只有一个执行计划。如果 Java 应用程序使用普通 JDBC 调用存储过程，则在第一次调用该过程时会创建执行计划，并且执行的 block(IF) 用于创建执行计划。
下次执行 ELSE 块时，它使用相同的执行计划，因此执行会很慢。
我问这个问题是因为我正在调用类似的存储过程，并且执行时间根据我传递的值和执行的块有很大的不同。
如果是这种情况，可以采取哪些措施来提高性能。是否应该编写一个单独的过程而不是使用 IF ELSE。
PFB存储过程代码：
PACKAGE COP00134_006_1 AS
TYPE t_cur_type IS REF CURSOR;
PROCEDURE GetConsignmentDetails(
sPInputList IN VARCHAR2,
sPInputType IN VARCHAR2,
cPCon OUT t_cur_type,
cPStatus OUT t_cur_type,
sPError OUT VARCHAR2);
END COP00134_006_1;
实施：
PACKAGE BODY COP00134_006_1 AS
PROCEDURE GetConsignmentDetails(
sPInputList IN VARCHAR2,
sPInputType IN VARCHAR2,
cPCon OUT t_cur_type,
cPStatus OUT t_cur_type,
sPError OUT VARCHAR2)
IS
BEGIN
sPError := '0';
IF sPInputType = 'CON' THEN
OPEN cPCon FOR
SELECT
con_id
,con_legacy_id
,con_create_td
,con_pickup_lt
,con_deliv_due_lt
,CON_DELIV_END_LT
,SRP_ID_AREA_DEST
,CON_CLNT_REF_TX
,BUL_CSYS_ID_ORIG
,BUL_ID_ORIG
,BUL_NM_ORIG
,BUL_NM_DEST
,cpn_oa_town_nm_r
,cpn_oa_town_nm_d
,cou_iso_id_orig
,Cou_Nm_Orig
,cou_iso_id_dest
,Cou_Nm_Dest
,PCE_QT
,DUPLICATES
,COS_SIGN_NM FROM (
SELECT /*+ cardinality (b 3) */
co.con_id
,co.con_legacy_id
,co.con_create_td
,co.con_pickup_lt
,co.con_deliv_due_lt
,co.CON_DELIV_END_LT
,co.SRP_ID_AREA_DEST
,co.CON_CLNT_REF_TX
,co.BUL_CSYS_ID_ORIG
,blOrig.BUL_ID as BUL_ID_ORIG
,blOrig.BUL_NM as BUL_NM_ORIG
,blDest.BUL_NM as BUL_NM_DEST
,cnr.cpn_oa_town_nm as cpn_oa_town_nm_r
,cnd.cpn_oa_town_nm as cpn_oa_town_nm_d
,co.cou_iso_id_orig
,cuOrig.Cou_nm as Cou_Nm_Orig
,co.cou_iso_id_dest
,cuDest.Cou_nm as Cou_Nm_Dest
,(select count(*) from CORPCV01 PC WHERE PC.CON_ID = CO.CON_ID) PCE_QT
,CASE WHEN COUNT(*) OVER(PARTITION BY CON_LEGACY_ID) > 1 THEN 'TRUE' ELSE 'FALSE' END AS DUPLICATES
,cs.COS_SIGN_NM, ROW_NUMBER() OVER(PARTITION BY CS.CON_ID ORDER BY COS_EVENT_TD) SEQ_NR
FROM corcov01 co
INNER JOIN corcnv01 cnr
ON cnr.con_id = co.con_id
AND cnr.cpn_type_cd = 'R'
LEFT OUTER JOIN corcnv01 cnd
ON cnd.con_id = co.con_id
AND cnd.cpn_type_cd = 'D'
INNER JOIN ncrcuv01 cuOrig
ON cuOrig.COU_ISO_ID = co.COU_ISO_ID_ORIG
AND TRUNC(CURRENT_DATE) BETWEEN cuOrig.COU_EFFECT_DT AND cuOrig.COU_EFFECT_TO_DT
INNER JOIN ncrcuv01 cuDest
ON cuDest.COU_ISO_ID = co.COU_ISO_ID_DEST
AND TRUNC(CURRENT_DATE) BETWEEN cuDest.COU_EFFECT_DT AND cuDest.COU_EFFECT_TO_DT
LEFT OUTER JOIN ncrblv01 blOrig
ON blOrig.BUL_CSYS_ID = co.BUL_CSYS_ID_ORIG
AND TRUNC(CURRENT_DATE) BETWEEN blOrig.BUL_EFFECT_DT AND blOrig.BUL_EFFECT_TO_DT
LEFT OUTER JOIN ncrblv01 blDest
ON blDest.BUL_CSYS_ID = co.BUL_CSYS_ID_DEST
AND TRUNC(CURRENT_DATE) BETWEEN blDest.BUL_EFFECT_DT AND blDest.BUL_EFFECT_TO_DT
LEFT OUTER JOIN corcsv01 cs
ON co.con_id = cs.con_id
AND cs.cos_sign_nm is not null
and cs.cos_delete_in = 'N'
WHERE co.con_Legacy_Id IN ( select dataItem from TABLE(ZYADMIN.ZYP90008.GetListFromCSV(sPInputList)) b )
)WHERE SEQ_NR = 1;
OPEN cPStatus FOR
SELECT csv.CON_ID AS CON_ID_COS
,csv.XSF_ID
,csv.XSS_ID
,csv.XSG_ID
,csv.XSD_ID
,ndv.XSX_ID
,ndv.xsd_customer_ds
,BUL_CSYS_ID_OCC
,nlv.BUL_NM as BUL_NM_OCC
,csv.COS_EVENT_LT
,ndv.XSD_SEVERITY_CD
,qb.QLA_DS
FROM corcsv01 csv
INNER JOIN corcov01 co
ON csv.con_id = co.con_id
INNER JOIN ncrsdv01 ndv
ON ndv.XSF_ID=csv.XSF_ID
AND ndv.XSS_ID=csv.XSS_ID
AND ndv.XSG_ID=csv.XSG_ID
AND ndv.XSD_ID=csv.XSD_ID
AND TRUNC(CURRENT_DATE) BETWEEN ndv.XSD_EFFECT_DT AND ndv.XSD_EFFECT_TO_DT
INNER JOIN ncrksv01 ks
ON ndv.XSX_ID= ks.XSX_ID
AND TRUNC(CURRENT_DATE) BETWEEN ks.SKT_EFFECT_DT AND ks.SKT_EFFECT_TO_DT
AND ks.SCA_ID = 'WEB'
LEFT OUTER JOIN ncrqav01 qa
ON qa.XSX_ID = ndv.XSX_ID
AND qa.APP_ID = 'EXCO'
AND TRUNC(CURRENT_DATE) BETWEEN QAS_EFFECT_DT AND QAS_EFFECT_TO_DT
LEFT OUTER JOIN ncrqbv01 qb
ON qa.QLA_ID = qb.QLA_ID
AND qa.APP_ID = qb.APP_ID
AND TRUNC(CURRENT_DATE) BETWEEN QLA_EFFECT_DT AND QLA_EFFECT_TO_DT
INNER JOIN ncrblv01 nlv
ON nlv.BUL_CSYS_ID=csv.BUL_CSYS_ID_OCC
AND TRUNC(CURRENT_DATE)BETWEEN nlv.BUL_EFFECT_DT AND nlv.BUL_EFFECT_TO_DT
WHERE co.con_Legacy_Id IN ( select dataItem from TABLE(ZYADMIN.ZYP90008.GetListFromCSV(sPInputList)) b );
ELSE
OPEN cPCon FOR
SELECT
con_id
,con_legacy_id
,con_create_td
,con_pickup_lt
,con_deliv_due_lt
,CON_DELIV_END_LT
,SRP_ID_AREA_DEST
,CON_CLNT_REF_TX
,BUL_CSYS_ID_ORIG
,BUL_ID_ORIG
,BUL_NM_ORIG
,BUL_NM_DEST
,cpn_oa_town_nm_r
,cpn_oa_town_nm_d
,cou_iso_id_orig
,Cou_Nm_Orig
,cou_iso_id_dest
,Cou_Nm_Dest
,PCE_QT
,DUPLICATES
,COS_SIGN_NM FROM (
SELECT /*+ cardinality (b 3) */
co.con_id
,co.con_legacy_id
,co.con_create_td
,co.con_pickup_lt
,co.con_deliv_due_lt
,co.CON_DELIV_END_LT
,co.SRP_ID_AREA_DEST
,co.CON_CLNT_REF_TX
,co.BUL_CSYS_ID_ORIG
,blOrig.BUL_ID as BUL_ID_ORIG
,blOrig.BUL_NM as BUL_NM_ORIG
,blDest.BUL_NM as BUL_NM_DEST
,cnr.cpn_oa_town_nm as cpn_oa_town_nm_r
,cnd.cpn_oa_town_nm as cpn_oa_town_nm_d
,co.cou_iso_id_orig
,cuOrig.Cou_nm as Cou_Nm_Orig
,co.cou_iso_id_dest
,cuDest.Cou_nm as Cou_Nm_Dest
,(select count(*) from CORPCV01 PC WHERE PC.CON_ID = CO.CON_ID) PCE_QT
,'FALSE' AS DUPLICATES
,cs.COS_SIGN_NM, ROW_NUMBER() OVER(PARTITION BY CS.CON_ID ORDER BY COS_EVENT_TD) SEQ_NR
FROM corcov01 co
INNER JOIN corcnv01 cnr
ON cnr.con_id = co.con_id
AND cnr.cpn_type_cd = 'R'
LEFT OUTER JOIN corcnv01 cnd
ON cnd.con_id = co.con_id
AND cnd.cpn_type_cd = 'D'
INNER JOIN ncrcuv01 cuOrig
ON cuOrig.COU_ISO_ID = co.COU_ISO_ID_ORIG
AND TRUNC(CURRENT_DATE) BETWEEN cuOrig.COU_EFFECT_DT AND cuOrig.COU_EFFECT_TO_DT
INNER JOIN ncrcuv01 cuDest
ON cuDest.COU_ISO_ID = co.COU_ISO_ID_DEST
AND TRUNC(CURRENT_DATE) BETWEEN cuDest.COU_EFFECT_DT AND cuDest.COU_EFFECT_TO_DT
LEFT OUTER JOIN ncrblv01 blOrig
ON blOrig.BUL_CSYS_ID = co.BUL_CSYS_ID_ORIG
AND TRUNC(CURRENT_DATE) BETWEEN blOrig.BUL_EFFECT_DT AND blOrig.BUL_EFFECT_TO_DT
LEFT OUTER JOIN ncrblv01 blDest
ON blDest.BUL_CSYS_ID = co.BUL_CSYS_ID_DEST
AND TRUNC(CURRENT_DATE) BETWEEN blDest.BUL_EFFECT_DT AND blDest.BUL_EFFECT_TO_DT
LEFT OUTER JOIN corcsv01 cs
ON co.con_id = cs.con_id
AND cs.cos_sign_nm is not null
and cs.cos_delete_in = 'N'
WHERE co.CON_CLNT_REF_CR IN ( select dataItem from TABLE(ZYADMIN.ZYP90008.GetListFromCSV(sPInputList)) b )
)WHERE SEQ_NR = 1;
OPEN cPStatus FOR
SELECT csv.CON_ID AS CON_ID_COS
,csv.XSF_ID
,csv.XSS_ID
,csv.XSG_ID
,csv.XSD_ID
,ndv.XSX_ID
,ndv.xsd_customer_ds
,BUL_CSYS_ID_OCC
,nlv.BUL_NM as BUL_NM_OCC
,csv.COS_EVENT_LT
,ndv.XSD_SEVERITY_CD
,qb.QLA_DS
FROM corcsv01 csv
INNER JOIN corcov01 co
ON csv.con_id = co.con_id
INNER JOIN ncrsdv01 ndv
ON ndv.XSF_ID=csv.XSF_ID
AND ndv.XSS_ID=csv.XSS_ID
AND ndv.XSG_ID=csv.XSG_ID
AND ndv.XSD_ID=csv.XSD_ID
AND TRUNC(CURRENT_DATE) BETWEEN ndv.XSD_EFFECT_DT AND ndv.XSD_EFFECT_TO_DT
INNER JOIN ncrksv01 ks
ON ndv.XSX_ID= ks.XSX_ID
AND TRUNC(CURRENT_DATE) BETWEEN ks.SKT_EFFECT_DT AND ks.SKT_EFFECT_TO_DT
AND ks.SCA_ID = 'WEB'
LEFT OUTER JOIN ncrqav01 qa
ON qa.XSX_ID = ndv.XSX_ID
AND qa.APP_ID = 'EXCO'
AND TRUNC(CURRENT_DATE) BETWEEN QAS_EFFECT_DT AND QAS_EFFECT_TO_DT
LEFT OUTER JOIN ncrqbv01 qb
ON qa.QLA_ID = qb.QLA_ID
AND qa.APP_ID = qb.APP_ID
AND TRUNC(CURRENT_DATE) BETWEEN QLA_EFFECT_DT AND QLA_EFFECT_TO_DT
INNER JOIN ncrblv01 nlv
ON nlv.BUL_CSYS_ID=csv.BUL_CSYS_ID_OCC
AND TRUNC(CURRENT_DATE)BETWEEN nlv.BUL_EFFECT_DT AND nlv.BUL_EFFECT_TO_DT
WHERE co.CON_CLNT_REF_CR IN ( select dataItem from TABLE(ZYADMIN.ZYP90008.GetListFromCSV(sPInputList)) b );
END IF;
EXCEPTION
WHEN OTHERS THEN
sPError := '1' ||' '||SQLCODE||' '||SUBSTR(SQLERRM, 1, 200);
END;
END COP00134_006_1;
问题在于在 ELSE 部分执行的查询。 正如 cmets 中提到的，我已经单独运行了相同的查询，它们在不到一秒的时间内执行，而当相同的数据传递给过程时，需要一分钟以上。我无法运行分析器，因为我没有数据库访问权限，并且向 DBA 询问相同的过程需要一个多星期的时间，我需要尽快解决这个问题
【问题讨论】：
-
AFAI，是的，如果您在通过 jdbc 从数据库检索数据时遇到性能问题，您应该这样做。
-
SQL 查询有执行计划，而不是存储过程（或任何 PL/SQL 代码块）。因此，将在您的存储过程中针对每个查询考虑执行计划。您不会像您描述的那样遇到问题。
-
@cihanseven - 不知道你的意思。只要配置正确，JDBC 就可以发挥出色的性能。
-
@APC 我没有提到性能问题与 JDBC 有关。它工作正常，没问题。我打算注意在存储过程上浪费时间。但我想是误解了，没问题兄弟:)
标签： oracle performance stored-procedures jdbc