我非常感谢您在调整以下SQL查询时提供的帮助。当我取消它时，它一直运行10分钟。
MARC_SEL在52秒内给了我31,253条记录 和MVKE_SEL在22秒内给了我431,060条记录
我重构了它以使用with子句但没有太大的改变。我可以合并什么来使它更快。请帮忙。
WITH ALL_XSAP_MATNR
AS (SELECT DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WHERE SOURCE = 'SP' )
, MARC_SEL AS
( SELECT DISTINCT A.SOURCE
,MARA.MATNR
,MARA.MTART
,MARA.MBRSH
,MARC.WERKS
,NVL(PX.WERKS,'/') DWERK
,NVL(MBEW.HKMAT,'/') HKMAT
,NVL(MBEW.EKALR,'/') EKALR
,NVL(MARC.STAWN,'/') STAWN
FROM ALL_XSAP_MATNR A
, XXX_MAIN.XXX_SAP_MARA MARA
, XXX_MAIN.XXX_SAP_MARC MARC
, XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
, XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART
AND MARA.MATNR = MARC.MATNR
AND MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY
AND PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP'
)
, MVKE_SEL AS
( SELECT DISTINCT
MVKE.MATNR
,'/' LEGACY_ORG
,'/' LEGACY_MATNR
,NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG
,NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG
-- ,NVL(TVRKME.MSEH3,'/') VRKME
,NVL(MVKE.KONDM,'/') KONDM
,NVL(MVKE.VERSG,'/') VERSG
,'/' IPRKZ
,'/' MHDRZ,NVL(MVKE.VMSTA,'/') VMSTA
,NVL(TO_CHAR(MVKE.VMSTD ,'YYYYMMDD' ),'/') VMSTD
,NVL(MVKE.PMATN,'/') PMATN
,NVL(MVKE.MVGR2,'/') MVGR2
,NVL(MVKE.MVGR3,'/') MVGR3
,NVL(MVKE.VAVME,'/') VAVME
,'/' MVGR4
,'/' MVGR5
,NVL(MVKE.MTPOS,'/') MTPOS
,NVL(MVKE.PRAT1,'/') PRAT1
,NVL(MVKE.SKTOF,'/') SKTOF
,'/' AUMNG
,NVL(MVKE.PRODH,'/') PRODH
,'/' MVGR1
,NVL(MVKE.KTGRM,'/') KTGRM
,MX_VKORG.DESC4
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
, XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL )
SELECT DISTINCT
MARC.SOURCE
,MARC.MATNR
,MARC.MTART
,MARC.MBRSH
,MARC.WERKS
,MARC.DWERK
,MARC.HKMAT
,MARC.EKALR
,MARC.STAWN
,MVKE.LEGACY_ORG
,MVKE.LEGACY_MATNR
,MVKE.VKORG
,MVKE.VTWEG
,MVKE.KONDM
,MVKE.VERSG
,MVKE.VMSTA
,MVKE.VMSTD
,MVKE.PMATN
,MVKE.MVGR2
,MVKE.MVGR3
,MVKE.VAVME
,MVKE.MTPOS
,MVKE.PRAT1
,MVKE.SKTOF
,MVKE.PRODH
,MVKE.KTGRM
FROM MARC_SEL MARC
, MVKE_SEL MVKE
WHERE MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4
答案 0 :(得分：2)
首先简化您的查询，因为您不需要执行多个DISTINCT（它只在最终输出中是必需的）并且您选择了许多未输出的列。您还要加入一些您没有选择的表，如果有多个匹配的行，那么它可能会生成重复的行 - 使用类似EXISTS的内容可以消除这些连接。
像这样：
WITH MARC_SEL AS (
SELECT A.SOURCE,
MARA.MATNR,
MARC.WERKS
FROM XXX_MAIN.XXX_XSAP A
INNER JOIN XXX_MAIN.XXX_SAP_MARA MARA
ON ( A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART )
INNER JOIN XXX_MAIN.XXX_SAP_MARC MARC
ON ( MARA.MATNR = MARC.MATNR )
WHERE EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
WHERE PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP' )
AND EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY )
AND A.SOURCE = 'SP'
)
, MVKE_SEL AS (
SELECT NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG,
NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG,
MX_VKORG.DESC4
FROM XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE EXISTS ( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG )
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL
)
SELECT DISTINCT
MARC.SOURCE,
MARC.MATNR,
MVKE.VKORG,
MARC.WERKS,
MVKE.VTWEG
FROM MARC_SEL MARC
INNER JOIN MVKE_SEL MVKE
ON ( MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4 )
答案 1 :(得分：0)
为子查询添加了提示，它在一分钟后又回来了。
WITH ALL_XSAP_MATNR
AS (SELECT /*+ materialize */ DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WHERE SOURCE = 'SP' )
, MARC_SEL AS
( SELECT /*+ materialize */ DISTINCT A.SOURCE
,MARA.MATNR
,MARA.MTART
,MARA.MBRSH
,MARC.WERKS
,NVL(PX.WERKS,'/') DWERK
,NVL(MBEW.HKMAT,'/') HKMAT
,NVL(MBEW.EKALR,'/') EKALR
,NVL(MARC.STAWN,'/') STAWN
FROM ALL_XSAP_MATNR A
, XXX_MAIN.XXX_SAP_MARA MARA
, XXX_MAIN.XXX_SAP_MARC MARC
, XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
, XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART
AND MARA.MATNR = MARC.MATNR
AND MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY
AND PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP'
)
, MVKE_SEL AS
( SELECT /*+ materialize */ DISTINCT
MVKE.MATNR
,'/' LEGACY_ORG
,'/' LEGACY_MATNR
,NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG
,NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG
-- ,NVL(TVRKME.MSEH3,'/') VRKME
,NVL(MVKE.KONDM,'/') KONDM
,NVL(MVKE.VERSG,'/') VERSG
,'/' IPRKZ
,'/' MHDRZ,NVL(MVKE.VMSTA,'/') VMSTA
,NVL(TO_CHAR(MVKE.VMSTD ,'YYYYMMDD' ),'/') VMSTD
,NVL(MVKE.PMATN,'/') PMATN
,NVL(MVKE.MVGR2,'/') MVGR2
,NVL(MVKE.MVGR3,'/') MVGR3
,NVL(MVKE.VAVME,'/') VAVME
,'/' MVGR4
,'/' MVGR5
,NVL(MVKE.MTPOS,'/') MTPOS
,NVL(MVKE.PRAT1,'/') PRAT1
,NVL(MVKE.SKTOF,'/') SKTOF
,'/' AUMNG
,NVL(MVKE.PRODH,'/') PRODH
,'/' MVGR1
,NVL(MVKE.KTGRM,'/') KTGRM
,MX_VKORG.DESC4
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
, XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL )
SELECT DISTINCT /*+ use_hash(MARC,MVKE ) */
MARC.SOURCE
,MARC.MATNR
,MARC.MTART
,MARC.MBRSH
,MARC.WERKS
,MARC.DWERK
,MARC.HKMAT
,MARC.EKALR
,MARC.STAWN
,MVKE.LEGACY_ORG
,MVKE.LEGACY_MATNR
,MVKE.VKORG
,MVKE.VTWEG
,MVKE.KONDM
,MVKE.VERSG
,MVKE.VMSTA
,MVKE.VMSTD
,MVKE.PMATN
,MVKE.MVGR2
,MVKE.MVGR3
,MVKE.VAVME
,MVKE.MTPOS
,MVKE.PRAT1
,MVKE.SKTOF
,MVKE.PRODH
,MVKE.KTGRM
FROM MARC_SEL MARC
, MVKE_SEL MVKE
WHERE MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4