嵌套视图正在降低性能，寻找提高性能的方法

时间：2016-07-15 16:52:53

标签： sql sql-server tsql

我正在使用SQl服务器而且我创建了一个从另一个视图调用数据的视图，并且性能非常慢。有没有办法提高性能？

First View是（此视图用于连接表并创建标志）

ALTER VIEW [dbo].[VW_MCCSR_FLAGS_MP] AS 

    SELECT TB2.*,
    ----FLAGS FOR CSV (GF1)
    CASE WHEN TB2.PAR_UL_01     IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_PAR_UL_01_FLAG,
    CASE WHEN TB2.NONPAR_UL_01  IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_NONPAR_UL_01_FLAG,
    CASE WHEN TB2.PAR_UL_19     IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_PAR_UL_19_FLAG,
    CASE WHEN TB2.NONPAR_UL_19  IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_NONPAR_UL_19_FLAG,
    CASE WHEN TB2.VUL_19        IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_VUL_19_FLAG,
    CASE WHEN TB2.UL_26         IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_UL_26_FLAG,
    CASE WHEN TB2.UL_67         IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_UL_67_FLAG,
    CASE WHEN TB2.UL_89         IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_UL_89_FLAG,
    CASE WHEN TB2.UL_94         IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_UL_94_FLAG,
    CASE WHEN TB2.VUL_94        IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_VUL_94_FLAG,
    CASE WHEN TB2.UL_102        IS NOT NULL AND TB2.ROW_ITEM = 'CSV (GF1)' THEN 1 ELSE 0 END AS CSV_GF1_UL_102_FLAG

    FROM

    (
    SELECT DISTINCT 'CSV' AS REPORT_NAME, 'CSV (GF1)'   AS ROW_ITEM,
    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 1      AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 4
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS PAR_UL_01,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 1      AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS NONPAR_UL_01,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 19     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 4
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS PAR_UL_19,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 19     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS NONPAR_UL_19,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 19     AND  TB1.US_SOE_Group_Code LIKE  'VUL' AND TB1.Par_Code  = 2
         THEN (SUM(TB1.Cash_Surrender_Value_Amt) - SUM(TB1.SEPERATE_ACCOUNT_VALUE)) END  AS VUL_19,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 26     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN 0 END  AS UL_26,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 94     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN (SUM(TB1.Cash_Surrender_Value_Amt) / 0.09) END  AS UL_67,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 89     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS UL_89,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 94     AND  TB1.US_SOE_Group_Code LIKE  'UL'  AND TB1.Par_Code  = 2
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS UL_94,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 94     AND  TB1.US_SOE_Group_Code LIKE  'VUL' AND TB1.Par_Code  = 2
         THEN (SUM(TB1.Cash_Surrender_Value_Amt) - SUM(TB1.SEPERATE_ACCOUNT_VALUE))  END  AS VUL_94,

    CASE WHEN TB1.GL_REINSURANCE_CLASS_CODE IS NULL  AND TB1.GL_Legal_ID_BK  = 102    AND  TB1.US_SOE_Group_Code LIKE  'UL'   AND TB1.Par_Code = 2
         THEN SUM(TB1.Cash_Surrender_Value_Amt) END  AS UL_102

    FROM 
    (SELECT distinct PF.POLICY_SID, PF.Cash_Surrender_Value_Amt ,CAST(PD.GL_Legal_ID_BK AS INT) AS GL_Legal_ID_BK,PD.US_SOE_Group_Code , CAST(PD.Par_Code AS INT) AS Par_Code
    ,CAST(CD.GL_REINSURANCE_CLASS_CODE AS INT) AS GL_REINSURANCE_CLASS_CODE
    , TBL1.FUND_BALANCE_AMT AS SEPERATE_ACCOUNT_VALUE

    FROM POLICY_FACT PF
    INNER JOIN Policy_DIM PD ON PF.Policy_SID = PD.Policy_SID
    LEFT OUTER JOIN (SELECT DISTINCT crf.policy_sid , crf.coverage_sid FROM dbo.Coverage_rider_fact crf 
                     WHERE CRF.Reporting_period_sid = (SELECT  b.DATE_SID 
                                                        FROM 
                                                        [VSTPODS_US].[dbo].[REF_EXTRACT_MONTH] A
                                                        INNER JOIN 
                                                            [dbo].date_dim b
                                                        ON 
                                                            SUBSTRING(CAST(b.date_sid AS VARCHAR(8)),1,6) = A.EXTRACT_MONTH
                                                            WHERE  A.CURR_IND=1 AND B.Last_Day_of_the_Month_Ind = 1)
                                                        )  CURF 
                     ON PD.Policy_SID = CURF.POLICY_SID

    LEFT OUTER JOIN COVERAGE_DIM CD ON CURF.Coverage_SID = CD.Coverage_SID
    LEFT OUTER JOIN ( SELECT FF.policy_sid, FF.FUND_BALANCE_AMT,FD.Fund_Account_Type_Code FROM 
                     dbo.Fund_Account_Fact FF 
                     INNER JOIN dbo.Fund_Account_dim FD ON FF.Fund_Account_sid = FD.Fund_Account_sid
                     WHERE FD.Fund_Account_Type_Code = 'S' AND
                     FF.Reporting_Period_SID = (SELECT  b.DATE_SID 
                                                        FROM 
                                                        [VSTPODS_US].[dbo].[REF_EXTRACT_MONTH] A
                                                        INNER JOIN 
                                                            [dbo].date_dim b
                                                        ON 
                                                            SUBSTRING(CAST(b.date_sid AS VARCHAR(8)),1,6) = A.EXTRACT_MONTH
                                                            WHERE  A.CURR_IND=1 AND B.Last_Day_of_the_Month_Ind = 1)
                     ) TBL1 ON TBL1.Policy_sid = PF.Policy_SID

        WHERE PF.Reporting_Period_SID = (SELECT  b.DATE_SID 
                                                        FROM 
                                                        [VSTPODS_US].[dbo].[REF_EXTRACT_MONTH] A
                                                        INNER JOIN 
                                                            [dbo].date_dim b
                                                        ON 
                                                            SUBSTRING(CAST(b.date_sid AS VARCHAR(8)),1,6) = A.EXTRACT_MONTH
                                                            WHERE  A.CURR_IND=1 AND B.Last_Day_of_the_Month_Ind = 1)) AS TB1
    GROUP BY TB1.GL_REINSURANCE_CLASS_CODE,TB1.GL_Legal_ID_BK,TB1.US_SOE_Group_Code, TB1.Par_Code ) TB2

此视图的输出类似于此enter image description here

并且调用视图的脚本是

ALTER  VIEW  [dbo].[VW_MCCSR_USNT_OUTPUT_MP] AS 
    SELECT DISTINCT V1.REPORT_NAME, V1.ROW_ITEM,
    (SELECT PAR_UL_01 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_PAR_UL_01_FLAG = 1)        AS PAR_UL_01,
    (SELECT NONPAR_UL_01 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_NONPAR_UL_01_FLAG = 1 ) AS NONPAR_UL_01,
    (SELECT PAR_UL_19 FROM dbo.VW_MCCSR_FLAGS_MP WHERE CSV_GF1_PAR_UL_19_FLAG IS NOT NULL  ) AS PAR_UL_19,
    (SELECT NONPAR_UL_19 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_NONPAR_UL_19_FLAG = 1 ) AS NONPAR_UL_19,
    (SELECT VUL_19 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_VUL_19_FLAG = 1 )             AS VUL_19,
    (SELECT UL_26 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_UL_26_FLAG = 1   )             AS UL_26,
    (SELECT UL_67 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_UL_67_FLAG = 1   )             AS UL_67,
    (SELECT UL_89 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_UL_89_FLAG = 1   )             AS UL_89,
    (SELECT UL_94 FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_UL_94_FLAG = 1   )             AS UL_94,
    (SELECT VUL_94  FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_VUL_94_FLAG = 1 )            AS VUL_94 ,
    (SELECT UL_102  FROM VW_MCCSR_FLAGS_MP WHERE CSV_GF1_UL_102_FLAG = 1 )            AS UL_102 

    FROM 
    VW_MCCSR_FLAGS_MP  V1 

    WHERE V1.ROW_ITEM = 'CSV (GF1)'

1 个答案:

答案 0 :(得分：0)

不是积极的，但看看这样的事情

SELECT distinct PF.POLICY_SID, PF.Cash_Surrender_Value_Amt 
     , CAST(PD.GL_Legal_ID_BK AS INT) AS GL_Legal_ID_BK,PD.US_SOE_Group_Code 
     , CAST(PD.Par_Code AS INT) AS Par_Code
     , CAST(CD.GL_REINSURANCE_CLASS_CODE AS INT) AS GL_REINSURANCE_CLASS_CODE
     , TBL1.FUND_BALANCE_AMT AS SEPERATE_ACCOUNT_VALUE
FROM POLICY_FACT PF
INNER JOIN Policy_DIM PD 
        ON PF.Policy_SID = PD.Policy_SID 
INNER JOIN [VSTPODS_US].[dbo].[REF_EXTRACT_MONTH] A
        on b.DATE_SID = PF.Policy_SID
INNER JOIN [dbo].date_dim b
        ON SUBSTRING(CAST(b.date_sid AS VARCHAR(8)),1,6) = A.EXTRACT_MONTH
       AND A.CURR_IND=1 AND B.Last_Day_of_the_Month_Ind = 1
LEFT OUTER JOIN  dbo.Coverage_rider_fact crf 
        ON PD.Policy_SID = CURF.POLICY_SID
.....
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