#ifNET9_0#pragmawarningdisable EF1001 // Internal EF Core API usage.namespaceBiwen.EFCore.UseRowNumberForPaging;usingMicrosoft.EntityFrameworkCore.Query;usingSystem.Collections.Generic;usingSystem.Reflection;publicclassSqlServer2008QueryTranslationPostprocessorFactory(QueryTranslationPostprocessorDependencies dep...
自SQLSERVER 2012起新增了 Offset Fetch 语法,因此EFCore默认是以此语法生成相应的分页语句的。 如果我们的目标数据库低于 2012,那么EFCore默认生成的语句在执行的时候肯定会报语法错误。为了兼容旧版本数据库,EFCore提供了 Row_Number( ) 分页方法。 在DB_DZZHContext.cs中修改如下配置,加上红色标记部分. 注:EF ...
[MiddleInitial], N'')) + N' ') + COALESCE([p0].[LastName], N'') AS [FullName], 1 AS [c], ROW_NUMBER() OVER(PARTITION BY [p0].[FirstName] ORDER BY [p0].[FirstName]) AS [row] FROM [People] AS [p0] ) AS [t1] WHERE [t1].[row] <= 1 ) AS [t0] ON [t].[...
在EF Core 3.0 之前,UseRowNumberForPaging 可用來問與 SQL Server 2008 相容的分頁產生 SQL。新的行為從EF Core 3.0 開始,EF 將只會針對與新版 SQL Server 相容的分頁產生 SQL。原因為何我們正在進行此變更,因為 SQL Server 2008 不再是支援的產品 \(英文\) 且更新此功能以搭配 EF Core 3.0 中的查詢變更...
[FolderId], [t].[Name] FROM ( SELECT [f0].[Id], [f0].[FolderId], [f0].[Name], ROW_NUMBER() OVER(PARTITION BY [f0].[FolderId] ORDER BY [f0].[Id]) AS [row] FROM [Files] AS [f0] ) AS [t] WHERE [t].[row] <= 1 ) AS [t0] ON [f].[Id] = [t0].[FolderId]...
System.Data.SqlClient.SqlException (0x80131904): The multi-part identifier \"t.__RowNumber__\" could not be bound. The multi-part identifier \"t.__RowNumber__\" could not be bound. at System.Data.SqlClient.SqlCommand.<>c.<ExecuteDbDataReaderAsync>b__126_0(Task`1 result) at System...
要更正这个SQL,我需要创建一个子查询: t.NAME,FROM ( i.NAME, ROW_NUMBER()--可能,最简单的方法是引入一种方法,向EF提示前面的查询应该是子查询。幸运的是,我们没有做太多事情,因为在内部,方法AsQueryable (或者更确切地说是与它相关的表达式)就是这样做的。有创建子查询的方法吗? 浏览0提问于2020-03-04...
(3)当数据库版本不高于2008R2的时候,我们就要进行全局设置UseRowNumberForPaging来适应低版本的分页功能。 (4)MaxBatchSize(1000)在进行大数据量处理的时候可以通过这个属性来设置当数据量超过1000的时候我们按1000行命令为一份传递给数据库执行。 (5)EnableRetryOnFailure连接复原,当因为网络断开或者故障导致的断开会进...
[MiddleInitial], ROW_NUMBER() OVER(PARTITION BY [p0].[FirstName] ORDER BY [p0].[FirstName], [p0].[LastName]) AS [row] FROM [People] AS [p0] ) AS [t1] WHERE [t1].[row] <= 1 ) AS [t0] ON [t].[FirstName] = [t0].[FirstName] LEFT JOIN [Shoes] AS [s] ON [t0]....
Before EF Core 3.0, UseRowNumberForPaging could be used to generate SQL for paging that is compatible with SQL Server 2008.New behaviorStarting with EF Core 3.0, EF will only generate SQL for paging that is only compatible with later SQL Server versions....