LINQPad - 无法理解生成的查询

Question

我在LINQPad中键入了以下LINQ，并使用dbcontext连接到我的数据库（SQL Server 2005）。

from j in Jobs
where j.dValuationDate.HasValue && j.dValuationDate.Value > EntityFunctions.AddDays(DateTime.Now, -7).Value &&
j.dValuationDate.Value < EntityFunctions.AddHours(DateTime.Now, -1).Value &&
j.bXMLServiceProviderID.HasValue && j.bXMLServiceProviderID.Value == 1 &&
!ValuationDelays.Any(x => x.iJobID == j.iJobID && x.iStatusID == 5)
select j.iJobID

Jobs和ValuationDelays是我的数据库中由iJobId列链接的表。

LINQPad生成的SQL是：

SELECT 
[Extent1].[iDelayID] AS [iDelayID], 
[Extent1].[iJobID] AS [iJobID], 
[Extent1].[sReasonforDelay] AS [sReasonforDelay], 
[Extent1].[dDateTime] AS [dDateTime], 
[Extent1].[iStaffID] AS [iStaffID], 
[Extent1].[iStatusID] AS [iStatusID], 
[Extent1].[dSentDate] AS [dSentDate], 
[Extent1].[yValExDelayReasonID] AS [yValExDelayReasonID], 
[Extent1].[dDelayedUntilDate] AS [dDelayedUntilDate], 
[Extent1].[dValuationDate] AS [dValuationDate], 
[Extent1].[valexActionUpdateId] AS [valexActionUpdateId], 
[Extent1].[valexAppointmentReasonId] AS [valexAppointmentReasonId]
FROM [dbo].[ValuationDelays] AS [Extent1]

注意没有where子句。我无法理解为什么LINQPad会生成这样的查询。我做错了什么？

在VS 2010中调试时，查询运行正常，并在C＃代码中返回预期结果。

Answer 1

您已!ValuationDelays取代!j.ValuationDelays。

看起来这会导致EF从数据库加载所有ValuationDelay并处理内存中的整个语句。我无法解释为什么Job记录中没有查询谓词，但至少你现在有一些问题需要纠正。