为什么EF 6.4生成的SQL有故障？

我有一个类似这样的查询。 用户ID是随机字母字符串。 searchCritera是要搜索的模型。 searchCriteria.MainRoleValueList包含搜索的角色（枚举）

生成的sql代码是

SELECT 
    [Extent1].[Id] AS [Id], 
    [Extent1].[UserId] AS [UserId], 
    [Extent1].[Main_Id] AS [Main_Id], 
    [Extent1].[MainRoleValue] AS [MainRoleValue], 
    [Extent1].[ValidFrom] AS [ValidFrom], 
    [Extent1].[ValidTo] AS [ValidTo]
    FROM  [dbo].[MainRoleMembership] AS [Extent1]
    INNER JOIN [dbo].[Person] AS [Extent2] ON ([Extent1].[UserId] = [Extent2].[UserId]) AND ([Extent1].[Main_Id] = [Extent2].[Main_Id])
    WHERE ([Extent1].[MainRoleValue] IN (300, 400, 200, 410)) AND ([Extent1].[ValidTo] IS NULL) AND (([Extent2].[FullName] LIKE '%rty12tt%' ESCAPE N'~') 
    OR ([Extent2].[UserId] LIKE '%rty12tt%' ESCAPE N'~')) AND 
    ( EXISTS (SELECT 
        1 AS [C1]
        FROM  ( SELECT 1 AS X ) AS [SingleRowTable1]
        WHERE 1 = 0
    ))

除了最后一部分，它还能工作

EXISTS (SELECT 
        1 AS [C1]
        FROM  ( SELECT 1 AS X ) AS [SingleRowTable1]
        WHERE 1 = 0

为什么要加上这个？因为它删除了我想要的正确结果。 如果我删除该部分并在SQL server上运行查询，我将获得所需的用户。 我应该如何重写我的查询，使其不包括在内

添加：是的，有UserId的两个表没有外键 用户ID。这是一个糟糕的系统设计，但我暂时无法修复

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添加：在表之间为UserId添加了一个外键，但没有帮助

我添加了一个外键，并与一个空列表进行了比较。。这就是为什么

EXISTS (SELECT 
        1 AS [C1]
        FROM  ( SELECT 1 AS X ) AS [SingleRowTable1]
        WHERE 1 = 0

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增加了。添加了清单的计数检查，问题消失了，从我所看到的，这是来自你所考虑的“很多代码不影响这个SeaReo”。EF6总是这样做，当它从模型约束+谓词推断谓词只能是假的。应该添加的时候添加了一个空列表

EXISTS (SELECT 
        1 AS [C1]
        FROM  ( SELECT 1 AS X ) AS [SingleRowTable1]
        WHERE 1 = 0