使用连接检查约束不适用于查询/视图

Question

我们有如下描述的视图：

CREATE view [dbo].[PriceHourlyView]
AS
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2018 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2017 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2016 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2015 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2014 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2013 WITH (NOLOCK)
union all
select NodeId, TimeStamp,RtDa,MarketId,Lmp,Mlc,Mcc,Issettledprice,datecreated,IsCalculated from dbo.PriceHourly2012 WITH (NOLOCK)

除未指定年份的当前表外，每个表每年都有如下检查约束：

ALTER TABLE [dbo].[PriceHourly2017]  WITH CHECK ADD  CONSTRAINT [CK_PriceHourly2017_Timestamp] CHECK  (([timestamp]>='2017-01-01' AND [timestamp]<='2017-12-31 23:59'))

当该视图本身被查询时，检查约束将限制正在搜索的表。执行计划如下：

SELECT
  *
FROM PriceHourlyview
WHERE nodeid = 24511
AND TimeStamp BETWEEN '2017-05-17' AND '2017-05-24'

现在，当我在时间戳字段上加入该表时，查询不再使用检查约束，而是使用每个表来检查数据。

SELECT
  *
FROM ShapeProfileDetails s WITH (NOLOCK)
LEFT JOIN PriceHourlyView p WITH (NOLOCK)
  ON s.TimeStamp = p.Timestamp
  AND s.EffectiveDate BETWEEN '2017-05-17' AND '2017-05-24'
WHERE NodeId = 24512
--AND s.EffectiveDate BETWEEN '2017-05-17' AND '2017-05-24'

我知道我没有在连接的示例中查询相同的字段，并假设这是问题所在，但这是我需要查询正确结果的字段。我想知道是否有任何提示或强制查询使用正确的检查约束。或者尝试加入并使用这些检查约束的最佳实践是什么。

Answer 1

好的，正如我们所讨论的，我们知道EffectiveDate和TimeStamp几乎相同。我会尝试做这样的事情。从技术上讲，这是相同的查询，但是我们会让SQL Server知道它可以使用约束（只需在BETWEEN的边缘减去并加1天）。

SELECT * FROM ShapeProfileDetails s WITH (NOLOCK) 
JOIN PriceHourlyView p WITH (NOLOCK) 
   ON s.TimeStamp = p.Timestamp 
AND s.EffectiveDate BETWEEN '2017-05-17' AND '2017-05-24' 
AND s.TimeStamp BETWEEN '2017-05-16' AND '2017-05-25' 
WHERE NodeId = 24512