我有一个问题，如果存储过程的执行计划具有IF ELSE语句，如何根据IN参数的值执行IF或ELSE块并且块中的查询获取相同的值，那么如何创建存储过程的执行计划？来自相同的表但在where子句中有不同的列。
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，则首次调用过程时会创建执行计划，并且执行块（IF）将用于创建执行计划。
下次执行ELSE块时，它使用相同的执行计划，因此执行速度很慢。
我问的是这个问题，因为我调用类似的存储过程，执行时间根据我传递的值和执行的块而有很大不同。
如果是这种情况，可以采取哪些措施来提高性能。是否应该编写单独的程序而不是使用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;
实现：
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ELSE部分中执行的查询。 正如评论中所提到的，我单独运行相同的查询，并且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，它需要超过一分钟。我无法运行分析器，因为我没有数据库访问权限，而且询问DBA的过程将花费一周以上的时间，我需要尽快解决这个问题
答案 0 :(得分：0)
Oracle为查询而非存储过程构建执行计划。因此，存储过程中的每个查询都有自己的执行计划。你这么说关于你的查询：
“在where子句中使用不同的列”
不同的列意味着不同的访问路径：这可能转化为索引的不同使用，不同的磁盘读取活动，可能不同的数据量。因此，根据IF ... ELSE的哪个分支来体验不同的性能并不奇怪。具有单独的过程不会改变基础查询的性能。
要检查差异，请为每个单独的查询运行EXPLAIN PLAN。 Find out more。您需要将语句剪切成SQL工作表（或用于处理SQL的任何工具）。
如果您认为问题出在存储过程中，那么您应该调查PL / SQL分析器的时间。 Find out more。如果它尚未安装，您可能需要DBA来安装它。
“当在存储过程中执行相同的查询时，相同的值和相同的数据需要60秒以上”
你一直在谈论经过的时间。你是如何衡量这些的？你在测量什么？时间到了哪里？当真正的罪魁祸首是一个糟糕的JDBC配置的错误网络连接时，这不是第一次因为性能不佳而被归咎于数据库。