SqlNullabilityProcessor.TryMakeNonNullable 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Query

程序集:

Microsoft.EntityFrameworkCore.Relational.dll

程序包:

Microsoft.EntityFrameworkCore.Relational v10.0.0

Source:

SqlNullabilityProcessor.cs

尝试将具有可为 null 投影的给定 selectExpression转换为没有可为 null 投影的相同表达式。 这用于从 中提取 NUL，例如SQL Server OPENJSON 的参数参数，以便实现更高效的转换。

[Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkInternal]
protected virtual bool TryMakeNonNullable(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression selectExpression, out Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression? rewrittenSelectExpression, out bool? foundNull);

[<Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkInternal>]
abstract member TryMakeNonNullable : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * SelectExpression * Nullable -> bool
override this.TryMakeNonNullable : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * SelectExpression * Nullable -> bool

Protected Overridable Function TryMakeNonNullable (selectExpression As SelectExpression, ByRef rewrittenSelectExpression As SelectExpression, ByRef foundNull As Nullable(Of Boolean)) As Boolean

参数

selectExpression

SelectExpression

rewrittenSelectExpression

SelectExpression

foundNull

Nullable<Boolean>

返回

Boolean

特性

EntityFrameworkInternalAttribute