SqlNullabilityProcessor.Visit 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

程序包:: Microsoft.EntityFrameworkCore.Relational v11.0.0

程序包:: Microsoft.EntityFrameworkCore.Relational v5.0.0

程序包:: Microsoft.EntityFrameworkCore.Relational v6.0.0

程序包:: Microsoft.EntityFrameworkCore.Relational v7.0.0

程序包:: Microsoft.EntityFrameworkCore.Relational v8.0.0

程序包:: Microsoft.EntityFrameworkCore.Relational v9.0.0

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

重载

名称	说明
Visit(SqlExpression, Boolean, Boolean)	访问并 SqlExpression 计算其可为 null 性。
Visit(SqlExpression, Boolean)	访问并 SqlExpression 计算其可为 null 性。
Visit(SelectExpression)	访问 a SelectExpression.
Visit(TableExpressionBase)	访问 a TableExpressionBase.
Visit(SelectExpression, Boolean)	访问 a SelectExpression.

Visit(SqlExpression, Boolean, Boolean)

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

访问并 SqlExpression 计算其可为 null 性。

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression? Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression? sqlExpression, bool allowOptimizedExpansion, out bool nullable);

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression sqlExpression, bool allowOptimizedExpansion, out bool nullable);

override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression

abstract member Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression
override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression

Protected Overridable Function Visit (sqlExpression As SqlExpression, allowOptimizedExpansion As Boolean, ByRef nullable As Boolean) As SqlExpression

参数

sqlExpression: SqlExpression

要访问的 sql 表达式。

allowOptimizedExpansion: Boolean

一个布尔值，该值指示是否允许将 null 值视为 false 值的优化扩展。

nullable: Boolean

一个布尔值，该值指示 sql 表达式是否可为 null。

SqlExpression

优化的 sql 表达式。

适用于

Visit(SqlExpression, Boolean)

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

访问并 SqlExpression 计算其可为 null 性。

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression? Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression? sqlExpression, out bool nullable);

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression sqlExpression, out bool nullable);

override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression

abstract member Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression
override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression

Protected Overridable Function Visit (sqlExpression As SqlExpression, ByRef nullable As Boolean) As SqlExpression

参数

sqlExpression: SqlExpression

要访问的 sql 表达式。

nullable: Boolean

一个布尔值，该值指示 sql 表达式是否可为 null。

SqlExpression

优化的 sql 表达式。

适用于

Visit(SelectExpression)

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

访问 a SelectExpression.

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression selectExpression);

abstract member Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression
override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression

Protected Overridable Function Visit (selectExpression As SelectExpression) As SelectExpression

参数

selectExpression: SelectExpression

要访问的选择表达式。

SelectExpression

优化的选择表达式。

适用于

Visit(TableExpressionBase)

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

访问 a TableExpressionBase.

protected virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase Visit(Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase tableExpressionBase);

abstract member Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase
override this.Visit : Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.TableExpressionBase

Protected Overridable Function Visit (tableExpressionBase As TableExpressionBase) As TableExpressionBase

参数

tableExpressionBase: TableExpressionBase

要访问的表表达式基。

TableExpressionBase

优化表表达式基。

适用于

Visit(SelectExpression, Boolean)

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs

Source:: SqlNullabilityProcessor.cs