Question

我有一个SQL Server视图来显示帐户报表的概述，首先我们计算用户帐户的最新期末余额，以了解其帐户中的最新余额。这是 LATEST_CB_DATES 部分。

我们计算下一个工作日，这意味着我们希望在数据库中获得余额的下两天。这发生在 NEXT_B_DAYS

中

最后，我们计算帐户是否期望收盘余额，收到一个或收到一个太迟。请注意，我们使用窗口接收结束。

IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS
        WHERE TABLE_NAME = 'VIEW_AS_AS_ACCT_STAT')
    DROP VIEW VIEW_AS_AS_ACCT_STAT
GO

CREATE VIEW VIEW_AS_AS_ACCT_STAT AS
WITH LATEST_CB_DATES AS (
SELECT * FROM (
   SELECT  row_number() over (partition by SD_ACCT.ID order by (AS_ACCT_STAT.CBAL_BAL_DATE) DESC) RN,SD_ACCT.ID, SD_ACCT.ACCT_NBR, AS_ACCT_STAT.CBAL_BAL_DATE AS BAL_DATE, SD_ACCT.CODE, SD_ACCT.CCY, SD_ACCT_GRP.ID AS GRP_ID, SD_ACCT_GRP.CODE AS ACCT_GRP_CODE, SD_ACCT.DATA_OWNER_ID, AS_ACCT_STAT.STATIC_DATA_BNK AS BANK_CODE, AS_ACCT_STAT.STATIC_DATA_HLD AS HOLDER_CODE
   FROM SD_ACCT
   LEFT JOIN AS_ACCT on SD_ACCT.ID = AS_ACCT.STATIC_DATA_ACCT_ID
   LEFT JOIN AS_ACCT_STAT on AS_ACCT.ID = AS_ACCT_STAT.ACCT_ID
   JOIN SD_ACCT_GRP_MEMBER ON SD_ACCT.ID = SD_ACCT_GRP_MEMBER.ACCT_ID
   JOIN SD_ACCT_GRP on SD_ACCT_GRP_MEMBER.GRP_ID = SD_ACCT_GRP.ID
   JOIN SD_ACCT_GRP_ROLE on SD_ACCT_GRP_ROLE.ID = SD_ACCT_GRP.ROLE_ID
   WHERE SD_ACCT_GRP_ROLE.CODE = 'AccountStatementsToReceive' AND (AS_ACCT_STAT.VALID = 1 OR AS_ACCT_STAT.VALID IS NULL)
   ) LST_STMT
WHERE RN = 1
),
NEXT_B_DAYS AS (
   SELECT VIEW_BUSINESS_DATES.CAL_ID, VIEW_BUSINESS_DATES.BUSINESS_DATE,
      LEAD(VIEW_BUSINESS_DATES.BUSINESS_DATE, 1) OVER (PARTITION BY VIEW_BUSINESS_DATES.CAL_CODE ORDER BY VIEW_BUSINESS_DATES.BUSINESS_DATE) AS NEXT_BUSINESS_DATE,
      LEAD(VIEW_BUSINESS_DATES.BUSINESS_DATE, 2) OVER (PARTITION BY VIEW_BUSINESS_DATES.CAL_CODE ORDER BY VIEW_BUSINESS_DATES.BUSINESS_DATE) AS SECOND_BUSINESS_DATE
   FROM VIEW_BUSINESS_DATES
)
SELECT LATEST_CB_DATES.ID AS ACCT_ID,
  LATEST_CB_DATES.CODE AS ACCT_CODE,
  LATEST_CB_DATES.ACCT_NBR,
  LATEST_CB_DATES.CCY AS ACCT_CCY,
  LATEST_CB_DATES.BAL_DATE AS LATEST_CLOSING_BAL_DATE,
  LATEST_CB_DATES.DATA_OWNER_ID,
  LATEST_CB_DATES.BANK_CODE,
  LATEST_CB_DATES.HOLDER_CODE,
  LATEST_CB_DATES.ACCT_GRP_CODE,
  CASE
    WHEN LATEST_CB_DATES.BAL_DATE IS NULL THEN 'Expecting'
    WHEN NEXT_B_DAYS.NEXT_BUSINESS_DATE IS NULL OR NEXT_B_DAYS.SECOND_BUSINESS_DATE IS NULL THEN 'Late'
    WHEN AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END IS NOT NULL AND GETDATE() >= TODATETIMEOFFSET(CAST(NEXT_B_DAYS.SECOND_BUSINESS_DATE AS DATETIME) + CAST(CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END  AS TIME)  AS DATETIME), SEC_TIMEZONE.UTC_TIME_TOTAL_OFFSET) THEN 'Late'
    WHEN AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END IS NULL     AND GETDATE() >= TODATETIMEOFFSET(CAST(NEXT_B_DAYS.SECOND_BUSINESS_DATE AS DATETIME) + CAST(CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_START AS TIME) AS DATETIME), SEC_TIMEZONE.UTC_TIME_TOTAL_OFFSET) AND CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END AS TIME) >= CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_START AS TIME) THEN 'Expecting'
    WHEN AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END IS NULL     AND GETDATE() >= TODATETIMEOFFSET(CAST(NEXT_B_DAYS.NEXT_BUSINESS_DATE   AS DATETIME) + CAST(CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_START AS TIME) AS DATETIME), SEC_TIMEZONE.UTC_TIME_TOTAL_OFFSET) AND CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END AS TIME) <  CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_START AS TIME) THEN 'Expecting' -- overnight
    WHEN AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END IS NULL     AND CAST (GETDATE() AS DATE) > NEXT_B_DAYS.SECOND_BUSINESS_DATE THEN 'Expecting'
    ELSE 'Received'
  END AS STAT,
  CASE
    WHEN LATEST_CB_DATES.BAL_DATE IS NULL THEN NULL
    WHEN NEXT_B_DAYS.NEXT_BUSINESS_DATE IS NULL OR NEXT_B_DAYS.SECOND_BUSINESS_DATE IS NULL THEN NULL
    WHEN AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END IS NOT NULL THEN CAST(NEXT_B_DAYS.SECOND_BUSINESS_DATE AS DATETIME) + CAST(CAST(AS_AS_RECEPTION_CONF.RECEPTION_WINDOW_END AS TIME) AS DATETIME)
    ELSE NULL
  END AS DEADLINE,
  SEC_TIMEZONE.UTC_TIME_TOTAL_OFFSET AS TIME_ZONE
FROM AS_AS_RECEPTION_CONF
JOIN LATEST_CB_DATES ON AS_AS_RECEPTION_CONF.ACCT_GRP_ID = LATEST_CB_DATES.GRP_ID
JOIN SEC_TIMEZONE ON SEC_TIMEZONE.ID = AS_AS_RECEPTION_CONF.TIME_ZONE_ID
LEFT JOIN NEXT_B_DAYS ON AS_AS_RECEPTION_CONF.CALENDAR_ID = NEXT_B_DAYS.CAL_ID AND LATEST_CB_DATES.BAL_DATE = NEXT_B_DAYS.BUSINESS_DATE
GO

SELECT * FROM VIEW_AS_AS_ACCT_STAT

问题是什么？没什么，这很好，但速度很慢。我们创建了一个图形报告来显示我们客户的数据，但是当你有5000个帐户时加载这个SQL需要1分钟，30秒，这太慢了。

我想原因是最后一行，但我没有设法很好地重构

LEFT JOIN NEXT_B_DAYS ON AS_AS_RECEPTION_CONF.CALENDAR_ID =
   NEXT_B_DAYS.CAL_ID AND LATEST_CB_DATES.BAL_DATE =
   NEXT_B_DAYS.BUSINESS_DATE

我的sql的执行计划可以找到here

我如何重构这个以使我的观点仍然有效但效果更好？

SQL Server：视图很慢

0 个答案: