优化实体框架中生成的sql查询？
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【中文标题】优化实体框架中生成的sql查询？【英文标题】：Optimize generated sql query in entity framework? 【发布时间】：2013-11-11 10:18:39 【问题描述】：我在 MVC4 应用程序中使用 SQL Server 2008 和 EntityFramework 6。
我正在使用以下代码从数据库中获取内容。
Content content = contentBusinessObject.SelectBy(contentPredicate.Expand(),
new List<string>
"Tags",
"User",
"Attachments",
"Products",
"ContentEditors",
"ContentEditors.User"
);
[DataObjectMethod(DataObjectMethodType.Select)]
public TEntity SelectBy(Expression<Func<TEntity, bool>> predicate, List<string> includeNavigationProperties = null)
if (includeNavigationProperties == null || includeNavigationProperties.Count <= 0)
return DBSet.FirstOrDefault(predicate);
DbQuery<TEntity> query = includeNavigationProperties.Aggregate<string, DbQuery<TEntity>>(DBSet, (current, property) => current.Include(property));
return query.FirstOrDefault(predicate);
以上代码生成以下t-sql
exec sp_executesql N'SELECT
[UnionAll3].[C2] AS [C1],
[UnionAll3].[C3] AS [C2],
[UnionAll3].[C4] AS [C3],
...
[UnionAll3].[C107] AS [C107],
[UnionAll3].[C108] AS [C108],
[UnionAll3].[C109] AS [C109],
[UnionAll3].[C110] AS [C110],
[UnionAll3].[C111] AS [C111],
[UnionAll3].[C112] AS [C112],
[UnionAll3].[C113] AS [C113],
[UnionAll3].[C114] AS [C114],
[UnionAll3].[C115] AS [C115]
FROM (SELECT
[UnionAll2].[C1] AS [C1],
[UnionAll2].[C2] AS [C2],
[UnionAll2].[C3] AS [C3],
[UnionAll2].[C4] AS [C4],
[UnionAll2].[C5] AS [C5],
...
[UnionAll2].[C109] AS [C109],
[UnionAll2].[C110] AS [C110],
[UnionAll2].[C111] AS [C111],
[UnionAll2].[C112] AS [C112],
[UnionAll2].[C113] AS [C113],
[UnionAll2].[C114] AS [C114],
[UnionAll2].[C115] AS [C115]
FROM (SELECT
[UnionAll1].[C1] AS [C1],
[UnionAll1].[Id] AS [C2],
[UnionAll1].[Id1] AS [C3],
...
[UnionAll1].[C49] AS [C102],
[UnionAll1].[C50] AS [C103],
[UnionAll1].[C51] AS [C104],
[UnionAll1].[C52] AS [C105],
[UnionAll1].[C53] AS [C106],
[UnionAll1].[C54] AS [C107],
[UnionAll1].[C55] AS [C108],
[UnionAll1].[C56] AS [C109],
[UnionAll1].[C57] AS [C110],
[UnionAll1].[C58] AS [C111],
[UnionAll1].[C59] AS [C112],
[UnionAll1].[C60] AS [C113],
[UnionAll1].[C61] AS [C114],
[UnionAll1].[C62] AS [C115]
FROM (SELECT
CASE WHEN ([Join2].[ContentId] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1],
[Limit1].[Id] AS [Id],
[Limit1].[Id] AS [Id1],
[Limit1].[Title] AS [Title],
[Limit1].[Summary] AS [Summary],
[Limit1].[Context] AS [Context],
[Limit1].[ImagePath] AS [ImagePath],
[Limit1].[UserId] AS [UserId],
[Limit1].[VisitNumber] AS [VisitNumber],
...........
[Join2].[Name] AS [Name],
[Join2].[Description] AS [Description],
[Join2].[ImagePath] AS [ImagePath1],
CAST(NULL AS int) AS [C2],
CAST(NULL AS varchar(1)) AS [C3],
CAST(NULL AS varchar(1)) AS [C4],
CAST(NULL AS varchar(1)) AS [C5],
CAST(NULL AS varchar(1)) AS [C6],
CAST(NULL AS varchar(1)) AS [C7],
CAST(NULL AS bigint) AS [C8],
CAST(NULL AS int) AS [C9],
CAST(NULL AS int) AS [C10],
CAST(NULL AS int) AS [C11],
CAST(NULL AS int) AS [C12],
CAST(NULL AS bit) AS [C13],
CAST(NULL AS datetime2) AS [C14],
CAST(NULL AS varchar(1)) AS [C15],
CAST(NULL AS int) AS [C16],
CAST(NULL AS varchar(1)) AS [C17],
CAST(NULL AS varchar(1)) AS [C18],
CAST(NULL AS varchar(1)) AS [C19],
CAST(NULL AS int) AS [C20],
CAST(NULL AS int) AS [C21],
CAST(NULL AS smallint) AS [C22],
CAST(NULL AS int) AS [C23],
CAST(NULL AS datetime2) AS [C24],
CAST(NULL AS bit) AS [C25],
CAST(NULL AS varchar(1)) AS [C26],
CAST(NULL AS int) AS [C27],
CAST(NULL AS int) AS [C28],
CAST(NULL AS int) AS [C29],
CAST(NULL AS int) AS [C30],
CAST(NULL AS bit) AS [C31],
CAST(NULL AS datetime2) AS [C32],
CAST(NULL AS varchar(1)) AS [C33],
CAST(NULL AS int) AS [C34],
CAST(NULL AS varchar(1)) AS [C35],
CAST(NULL AS varchar(1)) AS [C36],
CAST(NULL AS varchar(1)) AS [C37],
CAST(NULL AS varchar(1)) AS [C38],
CAST(NULL AS varchar(1)) AS [C39],
CAST(NULL AS int) AS [C40],
CAST(NULL AS bit) AS [C41],
CAST(NULL AS int) AS [C42],
CAST(NULL AS varchar(1)) AS [C43],
CAST(NULL AS varchar(1)) AS [C44],
CAST(NULL AS varchar(1)) AS [C45],
CAST(NULL AS varchar(1)) AS [C46],
CAST(NULL AS varchar(1)) AS [C47],
CAST(NULL AS datetime2) AS [C48],
CAST(NULL AS varchar(1)) AS [C49],
CAST(NULL AS datetime2) AS [C50],
CAST(NULL AS int) AS [C51],
CAST(NULL AS int) AS [C52],
CAST(NULL AS datetime2) AS [C53],
CAST(NULL AS int) AS [C54],
CAST(NULL AS varchar(1)) AS [C55],
CAST(NULL AS varchar(1)) AS [C56],
CAST(NULL AS varchar(1)) AS [C57],
CAST(NULL AS int) AS [C58],
CAST(NULL AS varchar(1)) AS [C59],
CAST(NULL AS varchar(1)) AS [C60],
CAST(NULL AS varchar(1)) AS [C61],
CAST(NULL AS varchar(1)) AS [C62]
FROM (SELECT TOP (1)
[Extent1].[Id] AS [Id],
[Extent1].[Title] AS [Title],
[Extent1].[Summary] AS [Summary],
[Extent1].[Context] AS [Context],
[Extent1].[Keywords] AS [Keywords],
[Extent1].[ImagePath] AS [ImagePath],
[Extent1].[UserId] AS [UserId],
[Extent1].[VisitNumber] AS [VisitNumber],
[Extent1].[LanguageId] AS [LanguageId],
[Extent1].[ReferenceName] AS [ReferenceName],
.....
[Extent2].[TwitterPage] AS [TwitterPage],
[Extent2].[FaceBookPage] AS [FaceBookPage],
[Extent2].[PersianblogPage] AS [PersianblogPage],
[Extent2].[ProfileVisitedNumber] AS [ProfileVisitedNumber],
[Extent2].[MinSalary] AS [MinSalary],
[Extent2].[Telephone] AS [Telephone],
[Extent2].[Mobile] AS [Mobile],
[Extent2].[ZipCode] AS [ZipCode],
[Extent2].[ProvinceId] AS [ProvinceId],
[Extent2].[City] AS [City],
[Extent2].[Address] AS [Address],
[Extent2].[LastRecoveryPasswordDate] AS [LastRecoveryPasswordDate],
[Extent2].[LastIP] AS [LastIP],
[Extent2].[RegistrationDate] AS [RegistrationDate1],
[Extent2].[PersianRegistrationDate] AS [PersianRegistrationDate1]
FROM [dbo].[Content] AS [Extent1]
INNER JOIN [dbo].[User] AS [Extent2] ON [Extent1].[UserId] = [Extent2].[Id]
WHERE ([Extent1].[Id] = @p__linq__0) AND (@p__linq__0 IS NOT NULL) AND ((([Extent1].[LanguageId] = @p__linq__1) AND ( NOT ([Extent1].[LanguageId] IS NULL OR @p__linq__1 IS NULL))) OR (([Extent1].[LanguageId] IS NULL) AND (@p__linq__1 IS NULL))) AND ((([Extent1].[StatusId] = @p__linq__2) AND ( NOT ([Extent1].[StatusId] IS NULL OR @p__linq__2 IS NULL))) OR (([Extent1].[StatusId] IS NULL) AND (@p__linq__2 IS NULL))) ) AS [Limit1]
LEFT OUTER JOIN (SELECT [Extent3].[ContentId] AS [ContentId], [Extent4].[Id] AS [Id], [Extent4].[Name] AS [Name], [Extent4].[Description] AS [Description], [Extent4].[ImagePath] AS [ImagePath]
FROM [dbo].[TagContent] AS [Extent3]
INNER JOIN [dbo].[Tag] AS [Extent4] ON [Extent4].[Id] = [Extent3].[TagId] ) AS [Join2] ON [Limit1].[Id] = [Join2].[ContentId]
UNION ALL
SELECT
2 AS [C1],
[Limit2].[Id] AS [Id],
[Limit2].[Id] AS [Id1],
[Limit2].[Title] AS [Title],
[Limit2].[Summary] AS [Summary],
[Limit2].[Context] AS [Context],
[Limit2].[ImagePath] AS [ImagePath],
[Limit2].[UserId] AS [UserId],
[Limit2].[VisitNumber] AS [VisitNumber],
[Limit2].[LanguageId] AS [LanguageId],
[Limit2].[ReferenceName] AS [ReferenceName],
[Limit2].[ReferenceLink] AS [ReferenceLink],
.....
[Extent7].[Path] AS [Path],
[Extent7].[Size] AS [Size],
[Extent7].[OrderNumber] AS [OrderNumber],
[Extent7].[GroupNumber] AS [GroupNumber],
[Extent7].[ContentId] AS [ContentId],
[Extent7].[MessageId] AS [MessageId],
[Extent7].[IsDownload] AS [IsDownload],
[Extent7].[RegistrationDate] AS [RegistrationDate2],
[Extent7].[PersianRegistrationDate] AS [PersianRegistrationDate2],
CAST(NULL AS int) AS [C6],
CAST(NULL AS varchar(1)) AS [C7],
CAST(NULL AS varchar(1)) AS [C8],
CAST(NULL AS varchar(1)) AS [C9],
CAST(NULL AS int) AS [C10],
CAST(NULL AS int) AS [C11],
CAST(NULL AS smallint) AS [C12],
CAST(NULL AS int) AS [C13],
CAST(NULL AS datetime2) AS [C14],
CAST(NULL AS bit) AS [C15],
CAST(NULL AS varchar(1)) AS [C16],
CAST(NULL AS int) AS [C17],
CAST(NULL AS int) AS [C18],
CAST(NULL AS int) AS [C19],
CAST(NULL AS int) AS [C20],
CAST(NULL AS bit) AS [C21],
CAST(NULL AS datetime2) AS [C22],
CAST(NULL AS varchar(1)) AS [C23],
CAST(NULL AS int) AS [C24],
CAST(NULL AS varchar(1)) AS [C25],
CAST(NULL AS varchar(1)) AS [C26],
CAST(NULL AS varchar(1)) AS [C27],
CAST(NULL AS varchar(1)) AS [C28],
CAST(NULL AS varchar(1)) AS [C29],
CAST(NULL AS int) AS [C30],
CAST(NULL AS bit) AS [C31],
CAST(NULL AS int) AS [C32],
CAST(NULL AS varchar(1)) AS [C33],
CAST(NULL AS varchar(1)) AS [C34],
CAST(NULL AS varchar(1)) AS [C35],
CAST(NULL AS varchar(1)) AS [C36],
CAST(NULL AS varchar(1)) AS [C37],
CAST(NULL AS datetime2) AS [C38],
CAST(NULL AS varchar(1)) AS [C39],
CAST(NULL AS datetime2) AS [C40],
CAST(NULL AS int) AS [C41],
CAST(NULL AS int) AS [C42],
CAST(NULL AS datetime2) AS [C43],
CAST(NULL AS int) AS [C44],
CAST(NULL AS varchar(1)) AS [C45],
CAST(NULL AS varchar(1)) AS [C46],
CAST(NULL AS varchar(1)) AS [C47],
CAST(NULL AS int) AS [C48],
CAST(NULL AS varchar(1)) AS [C49],
CAST(NULL AS varchar(1)) AS [C50],
CAST(NULL AS varchar(1)) AS [C51],
CAST(NULL AS varchar(1)) AS [C52]
FROM (SELECT TOP (1)
[Extent5].[Id] AS [Id],
[Extent5].[Title] AS [Title],
[Extent5].[Summary] AS [Summary],
[Extent5].[Context] AS [Context],
[Extent5].[Keywords] AS [Keywords],
[Extent5].[ImagePath] AS [ImagePath],
[Extent5].[UserId] AS [UserId],
[Extent5].[VisitNumber] AS [VisitNumber],
[Extent5].[LanguageId] AS [LanguageId],
[Extent5].[ReferenceName] AS [ReferenceName],
[Extent5].[ReferenceLink] AS [ReferenceLink],
[Extent5].[IsSpecial] AS [IsSpecial],
......
[Extent6].[ProfileVisitedNumber] AS [ProfileVisitedNumber],
[Extent6].[MinSalary] AS [MinSalary],
[Extent6].[Telephone] AS [Telephone],
[Extent6].[Mobile] AS [Mobile],
[Extent6].[ZipCode] AS [ZipCode],
[Extent6].[ProvinceId] AS [ProvinceId],
[Extent6].[City] AS [City],
[Extent6].[Address] AS [Address],
[Extent6].[LastRecoveryPasswordDate] AS [LastRecoveryPasswordDate],
[Extent6].[LastIP] AS [LastIP],
[Extent6].[RegistrationDate] AS [RegistrationDate1],
[Extent6].[PersianRegistrationDate] AS [PersianRegistrationDate1]
FROM [dbo].[Content] AS [Extent5]
INNER JOIN [dbo].[User] AS [Extent6] ON [Extent5].[UserId] = [Extent6].[Id]
WHERE ([Extent5].[Id] = @p__linq__0) AND (@p__linq__0 IS NOT NULL) AND ((([Extent5].[LanguageId] = @p__linq__1) AND ( NOT ([Extent5].[LanguageId] IS NULL OR @p__linq__1 IS NULL))) OR (([Extent5].[LanguageId] IS NULL) AND (@p__linq__1 IS NULL))) AND ((([Extent5].[StatusId] = @p__linq__2) AND ( NOT ([Extent5].[StatusId] IS NULL OR @p__linq__2 IS NULL))) OR (([Extent5].[StatusId] IS NULL) AND (@p__linq__2 IS NULL))) ) AS [Limit2]
INNER JOIN [dbo].[Attachment] AS [Extent7] ON [Limit2].[Id] = [Extent7].[ContentId]) AS [UnionAll1]
UNION ALL
SELECT
3 AS [C1],
[Limit3].[Id] AS [Id],
[Limit3].[Id] AS [Id1],
[Limit3].[Title] AS [Title],
[Limit3].[Summary] AS [Summary],
[Limit3].[Context] AS [Context],
[Limit3].[ImagePath] AS [ImagePath],
[Limit3].[UserId] AS [UserId],
[Limit3].[VisitNumber] AS [VisitNumber],
[Limit3].[LanguageId] AS [LanguageId],
[Limit3].[ReferenceName] AS [ReferenceName],
[Limit3].[ReferenceLink] AS [ReferenceLink],
.....
[Limit3].[ZipCode] AS [ZipCode],
[Limit3].[ProvinceId] AS [ProvinceId],
[Limit3].[City] AS [City],
[Limit3].[Address] AS [Address],
[Limit3].[LastIP] AS [LastIP],
[Limit3].[PersianRegistrationDate1] AS [PersianRegistrationDate1],
CAST(NULL AS int) AS [C2],
CAST(NULL AS varchar(1)) AS [C3],
CAST(NULL AS varchar(1)) AS [C4],
CAST(NULL AS varchar(1)) AS [C5],
CAST(NULL AS int) AS [C6],
CAST(NULL AS varchar(1)) AS [C7],
CAST(NULL AS varchar(1)) AS [C8],
CAST(NULL AS varchar(1)) AS [C9],
CAST(NULL AS varchar(1)) AS [C10],
CAST(NULL AS varchar(1)) AS [C11],
CAST(NULL AS bigint) AS [C12],
CAST(NULL AS int) AS [C13],
CAST(NULL AS int) AS [C14],
CAST(NULL AS int) AS [C15],
CAST(NULL AS int) AS [C16],
CAST(NULL AS bit) AS [C17],
CAST(NULL AS datetime2) AS [C18],
CAST(NULL AS varchar(1)) AS [C19],
[Extent10].[Id] AS [Id3],
[Extent10].[Name] AS [Name],
[Extent10].[Description] AS [Description],
[Extent10].[ImagePath] AS [ImagePath1],
[Extent10].[Price] AS [Price],
[Extent10].[ContentId] AS [ContentId],
[Extent10].[OrderNumber] AS [OrderNumber],
[Extent10].[StatusId] AS [StatusId2],
[Extent10].[RegistrationDate] AS [RegistrationDate2],
[Extent10].[IsDeleted] AS [IsDeleted],
[Extent10].[PersianRegistrationDate] AS [PersianRegistrationDate2],
CAST(NULL AS int) AS [C20],
CAST(NULL AS int) AS [C21],
CAST(NULL AS int) AS [C22],
CAST(NULL AS int) AS [C23],
CAST(NULL AS bit) AS [C24],
CAST(NULL AS datetime2) AS [C25],
CAST(NULL AS varchar(1)) AS [C26],
CAST(NULL AS int) AS [C27],
CAST(NULL AS varchar(1)) AS [C28],
CAST(NULL AS varchar(1)) AS [C29],
CAST(NULL AS varchar(1)) AS [C30],
CAST(NULL AS varchar(1)) AS [C31],
CAST(NULL AS varchar(1)) AS [C32],
CAST(NULL AS int) AS [C33],
CAST(NULL AS bit) AS [C34],
CAST(NULL AS int) AS [C35],
CAST(NULL AS varchar(1)) AS [C36],
CAST(NULL AS varchar(1)) AS [C37],
CAST(NULL AS varchar(1)) AS [C38],
CAST(NULL AS varchar(1)) AS [C39],
CAST(NULL AS varchar(1)) AS [C40],
CAST(NULL AS datetime2) AS [C41],
CAST(NULL AS varchar(1)) AS [C42],
CAST(NULL AS datetime2) AS [C43],
CAST(NULL AS int) AS [C44],
CAST(NULL AS int) AS [C45],
CAST(NULL AS datetime2) AS [C46],
CAST(NULL AS int) AS [C47],
CAST(NULL AS varchar(1)) AS [C48],
CAST(NULL AS varchar(1)) AS [C49],
CAST(NULL AS varchar(1)) AS [C50],
CAST(NULL AS int) AS [C51],
CAST(NULL AS varchar(1)) AS [C52],
CAST(NULL AS varchar(1)) AS [C53],
CAST(NULL AS varchar(1)) AS [C54],
CAST(NULL AS varchar(1)) AS [C55]
FROM (SELECT TOP (1)
[Extent8].[Id] AS [Id],
[Extent8].[Title] AS [Title],
[Extent8].[Summary] AS [Summary],
[Extent8].[Context] AS [Context],
[Extent8].[Keywords] AS [Keywords],
[Extent8].[ImagePath] AS [ImagePath],
[Extent8].[UserId] AS [UserId],
....
[Extent9].[ProfileVisitedNumber] AS [ProfileVisitedNumber],
[Extent9].[MinSalary] AS [MinSalary],
[Extent9].[Telephone] AS [Telephone],
[Extent9].[Mobile] AS [Mobile],
[Extent9].[ZipCode] AS [ZipCode],
[Extent9].[ProvinceId] AS [ProvinceId],
[Extent9].[City] AS [City],
[Extent9].[Address] AS [Address],
[Extent9].[LastRecoveryPasswordDate] AS [LastRecoveryPasswordDate],
[Extent9].[LastIP] AS [LastIP],
[Extent9].[RegistrationDate] AS [RegistrationDate1],
[Extent9].[PersianRegistrationDate] AS [PersianRegistrationDate1]
FROM [dbo].[Content] AS [Extent8]
INNER JOIN [dbo].[User] AS [Extent9] ON [Extent8].[UserId] = [Extent9].[Id]
WHERE ([Extent8].[Id] = @p__linq__0) AND (@p__linq__0 IS NOT NULL) AND ((([Extent8].[LanguageId] = @p__linq__1) AND ( NOT ([Extent8].[LanguageId] IS NULL OR @p__linq__1 IS NULL))) OR (([Extent8].[LanguageId] IS NULL) AND (@p__linq__1 IS NULL))) AND ((([Extent8].[StatusId] = @p__linq__2) AND ( NOT ([Extent8].[StatusId] IS NULL OR @p__linq__2 IS NULL))) OR (([Extent8].[StatusId] IS NULL) AND (@p__linq__2 IS NULL))) ) AS [Limit3]
INNER JOIN [dbo].[Product] AS [Extent10] ON [Limit3].[Id] = [Extent10].[ContentId]) AS [UnionAll2]
UNION ALL
SELECT
4 AS [C1],
[Limit4].[Id] AS [Id],
[Limit4].[Id] AS [Id1],
[Limit4].[Title] AS [Title],
[Limit4].[Summary] AS [Summary],
[Limit4].[Context] AS [Context],
[Limit4].[ImagePath] AS [ImagePath],
[Limit4].[UserId] AS [UserId],
[Limit4].[VisitNumber] AS [VisitNumber],
.....
[Limit4].[City] AS [City],
[Limit4].[Address] AS [Address],
[Limit4].[LastIP] AS [LastIP],
[Limit4].[PersianRegistrationDate1] AS [PersianRegistrationDate1],
CAST(NULL AS int) AS [C2],
CAST(NULL AS varchar(1)) AS [C3],
CAST(NULL AS varchar(1)) AS [C4],
CAST(NULL AS varchar(1)) AS [C5],
CAST(NULL AS int) AS [C6],
CAST(NULL AS varchar(1)) AS [C7],
CAST(NULL AS varchar(1)) AS [C8],
....
CAST(NULL AS varchar(1)) AS [C23],
CAST(NULL AS int) AS [C24],
CAST(NULL AS int) AS [C25],
CAST(NULL AS smallint) AS [C26],
CAST(NULL AS int) AS [C27],
CAST(NULL AS datetime2) AS [C28],
CAST(NULL AS bit) AS [C29],
CAST(NULL AS varchar(1)) AS [C30],
[Join9].[Id1] AS [Id3],
[Join9].[Id1] AS [Id4],
...
[Join9].[City] AS [City1],
[Join9].[Address] AS [Address1],
[Join9].[LastIP] AS [LastIP1],
[Join9].[PersianRegistrationDate] AS [PersianRegistrationDate2]
FROM (SELECT TOP (1)
[Extent11].[Id] AS [Id],
[Extent11].[Title] AS [Title],
[Extent11].[Summary] AS [Summary],
[Extent11].[Context] AS [Context],
[Extent11].[Keywords] AS [Keywords],
[Extent11].[ImagePath] AS [ImagePath],
[Extent11].[UserId] AS [UserId],
[Extent11].[VisitNumber] AS [VisitNumber],
[Extent11].[LanguageId] AS [LanguageId],
[Extent11].[ReferenceName] AS [ReferenceName],
[Extent11].[ReferenceLink] AS [ReferenceLink],
[Extent11].[IsSpecial] AS [IsSpecial],
[Extent11].[RegistrationDate] AS [RegistrationDate],
[Extent11].[StatusId] AS [StatusId],
[Extent11].[SubjectId] AS [SubjectId],
[Extent11].[LockCommenting] AS [LockCommenting],
[Extent11].[AllTagsString] AS [AllTagsString],
[Extent11].[OnlyVisibleToMembers] AS [OnlyVisibleToMembers],
[Extent11].[PersianRegistrationDate] AS [PersianRegistrationDate],
[Extent12].[Id] AS [Id1],
[Extent12].[FirstName] AS [FirstName],
[Extent12].[LastName] AS [LastName],
[Extent12].[FullName] AS [FullName],
[Extent12].[Username] AS [Username],
[Extent12].[Password] AS [Password],
[Extent12].[Email] AS [Email],
[Extent12].[RoleId] AS [RoleId],
[Extent12].[IsAdmin] AS [IsAdmin],
[Extent12].[LanguageId] AS [LanguageId1],
[Extent12].[PhotoPath] AS [PhotoPath],
[Extent12].[StatusId] AS [StatusId1],
[Extent12].[LastVisitDate] AS [LastVisitDate],
[Extent12].[AboutUser] AS [AboutUser],
[Extent12].[TwitterPage] AS [TwitterPage],
[Extent12].[FaceBookPage] AS [FaceBookPage],
[Extent12].[PersianblogPage] AS [PersianblogPage],
[Extent12].[ProfileVisitedNumber] AS [ProfileVisitedNumber],
[Extent12].[MinSalary] AS [MinSalary],
[Extent12].[Telephone] AS [Telephone],
[Extent12].[Mobile] AS [Mobile],
[Extent12].[ZipCode] AS [ZipCode],
[Extent12].[ProvinceId] AS [ProvinceId],
[Extent12].[City] AS [City],
[Extent12].[Address] AS [Address],
[Extent12].[LastRecoveryPasswordDate] AS [LastRecoveryPasswordDate],
[Extent12].[LastIP] AS [LastIP],
[Extent12].[RegistrationDate] AS [RegistrationDate1],
[Extent12].[PersianRegistrationDate] AS [PersianRegistrationDate1]
FROM [dbo].[Content] AS [Extent11]
INNER JOIN [dbo].[User] AS [Extent12] ON [Extent11].[UserId] = [Extent12].[Id]
WHERE ([Extent11].[Id] = @p__linq__0) AND (@p__linq__0 IS NOT NULL) AND ((([Extent11].[LanguageId] = @p__linq__1) AND ( NOT ([Extent11].[LanguageId] IS NULL OR @p__linq__1 IS NULL))) OR (([Extent11].[LanguageId] IS NULL) AND (@p__linq__1 IS NULL))) AND ((([Extent11].[StatusId] = @p__linq__2) AND ( NOT ([Extent11].[StatusId] IS NULL OR @p__linq__2 IS NULL))) OR (([Extent11].[StatusId] IS NULL) AND (@p__linq__2 IS NULL))) ) AS [Limit4]
INNER JOIN (SELECT [Extent13].[Id] AS [Id1], [Extent13].[ContentId] AS [ContentId], [Extent13].[UserId] AS [UserId], [Extent13].[IsReadyToPublish] AS [IsReadyToPublish], [Extent13].[EditDate] AS [EditDate], [Extent13].[PersianEditDate] AS [PersianEditDate], [Extent14].[Id] AS [Id2], [Extent14].[FirstName] AS [FirstName], [Extent14].[LastName] AS [LastName], [Extent14].[FullName] AS [FullName], [Extent14].[Username] AS [Username], [Extent14].[Password] AS [Password], [Extent14].[Email] AS [Email], [Extent14].[RoleId] AS [RoleId], [Extent14].[IsAdmin] AS [IsAdmin], [Extent14].[LanguageId] AS [LanguageId], [Extent14].[PhotoPath] AS [PhotoPath], [Extent14].[StatusId] AS [StatusId], [Extent14].[LastVisitDate] AS [LastVisitDate], [Extent14].[AboutUser] AS [AboutUser], [Extent14].[TwitterPage] AS [TwitterPage], [Extent14].[FaceBookPage] AS [FaceBookPage], [Extent14].[PersianblogPage] AS [PersianblogPage], [Extent14].[ProfileVisitedNumber] AS [ProfileVisitedNumber], [Extent14].[MinSalary] AS [MinSalary], [Extent14].[Telephone] AS [Telephone], [Extent14].[Mobile] AS [Mobile], [Extent14].[ZipCode] AS [ZipCode], [Extent14].[ProvinceId] AS [ProvinceId], [Extent14].[City] AS [City], [Extent14].[Address] AS [Address], [Extent14].[LastRecoveryPasswordDate] AS [LastRecoveryPasswordDate], [Extent14].[LastIP] AS [LastIP], [Extent14].[RegistrationDate] AS [RegistrationDate], [Extent14].[PersianRegistrationDate] AS [PersianRegistrationDate]
FROM [dbo].[ContentEditor] AS [Extent13]
INNER JOIN [dbo].[User] AS [Extent14] ON [Extent13].[UserId] = [Extent14].[Id] ) AS [Join9] ON [Limit4].[Id] = [Join9].[ContentId]) AS [UnionAll3]
ORDER BY [UnionAll3].[C3] ASC, [UnionAll3].[C22] ASC, [UnionAll3].[C1] ASC',N'@p__linq__0 int,@p__linq__1 int,@p__linq__2 int',@p__linq__0=2223,@p__linq__1=1,@p__linq__2=2
有没有办法优化它？如果没有办法，我们如何编写优化的存储过程而不是上面的EF代码？
【问题讨论】：
【参考方案1】：无法修改从 EF 生成的 SQL。如果您需要更优化的 SQL，那么您最好的选择是编写自己的存储过程并调用它。
【讨论】：
能否指导我如何为上述查询编写优化的存储过程？ @Mohammad 这不是问题所在，如果您有想要优化的 SQL 语句，我建议您创建一个单独的问题，详细说明为什么您当前的 SQL 语句对您来说不够高效。在你的问题中生成的 SQL 看起来非常复杂，有很多联合/连接 - 这可能是它不是非常快的原因。 可以使用dbContext.Database.SqlQuery以上是关于优化实体框架中生成的sql查询？的主要内容，如果未能解决你的问题，请参考以下文章