SqlExpressionFactory.Function 方法

参考

定义

命名空间:: Microsoft.EntityFrameworkCore.Query

程序集:: Microsoft.EntityFrameworkCore.Relational.dll

包:: Microsoft.EntityFrameworkCore.Relational v3.0.0

包:: Microsoft.EntityFrameworkCore.Relational v3.1.0

包:: Microsoft.EntityFrameworkCore.Relational v5.0.0

包:: Microsoft.EntityFrameworkCore.Relational v6.0.0

包:: Microsoft.EntityFrameworkCore.Relational v7.0.0

包:: Microsoft.EntityFrameworkCore.Relational v8.0.0

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

Function(String, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(String, String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)	创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)	创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(SqlExpression, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(SqlExpression, String, IEnumerable<SqlExpression>, Boolean, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)	创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(SqlExpression, String, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(String, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。
Function(String, String, Type, RelationalTypeMapping)	已过时. 创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

Function(String, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

注意

Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string? schema, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")>]
abstract member Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (schema As String, name As String, arguments As IEnumerable(Of SqlExpression), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

schema: String

在其中定义函数的架构。

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

Function(String, String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string? schema, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (schema As String, name As String, arguments As IEnumerable(Of SqlExpression), nullable As Boolean, argumentsPropagateNullability As IEnumerable(Of Boolean), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

schema: String

在其中定义函数的架构。

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

nullable: Boolean

一个布尔值，指示此函数是否可以返回 null。

argumentsPropagateNullability: IEnumerable<Boolean>

指示单个参数是否将 null 传播到结果的布尔值列表。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

适用于

Function(String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (name As String, arguments As IEnumerable(Of SqlExpression), nullable As Boolean, argumentsPropagateNullability As IEnumerable(Of Boolean), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

nullable: Boolean

一个布尔值，指示此函数是否可以返回 null。

argumentsPropagateNullability: IEnumerable<Boolean>

指示单个参数是否将 null 传播到结果的布尔值列表。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

适用于

Function(SqlExpression, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

注意

Use overload that explicitly specifies values for 'instancePropagatesNullability' and 'argumentsPropagateNullability' arguments.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies values for 'instancePropagatesNullability' and 'argumentsPropagateNullability' arguments.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies values for 'instancePropagatesNullability' and 'argumentsPropagateNullability' arguments.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use overload that explicitly specifies values for 'instancePropagatesNullability' and 'argumentsPropagateNullability' arguments.")>]
abstract member Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (instance As SqlExpression, name As String, arguments As IEnumerable(Of SqlExpression), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

instance: SqlExpression

对其应用函数的表达式。

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(SqlExpression, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

Function(SqlExpression, String, IEnumerable<SqlExpression>, Boolean, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, bool instancePropagatesNullability, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, bool nullable, bool instancePropagatesNullability, System.Collections.Generic.IEnumerable<bool> argumentsPropagateNullability, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * bool * bool * seq<bool> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (instance As SqlExpression, name As String, arguments As IEnumerable(Of SqlExpression), nullable As Boolean, instancePropagatesNullability As Boolean, argumentsPropagateNullability As IEnumerable(Of Boolean), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

instance: SqlExpression

对其应用函数的表达式。

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

nullable: Boolean

一个布尔值，指示此函数是否可以返回 null。

instancePropagatesNullability: Boolean

一个值，该值指示实例是否将 null 传播到结果。

argumentsPropagateNullability: IEnumerable<Boolean>

指示单个参数是否将 null 传播到结果的布尔值列表。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(SqlExpression, String, IEnumerable<SqlExpression>, Boolean, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

适用于

Function(String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

注意

Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, System.Collections.Generic.IEnumerable<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> arguments, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use overload that explicitly specifies value for 'argumentsPropagateNullability' argument.")>]
abstract member Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * seq<Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression> * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (name As String, arguments As IEnumerable(Of SqlExpression), returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

name: String

函数的名称。

arguments: IEnumerable<SqlExpression>

函数的参数。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

Function(SqlExpression, String, Type, RelationalTypeMapping)

注意

Use NiladicFunction method.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression instance, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use NiladicFunction method.")>]
abstract member Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (instance As SqlExpression, name As String, returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

instance: SqlExpression

对其应用函数的表达式。

name: String

函数的名称。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(SqlExpression, String, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

Function(String, Type, RelationalTypeMapping)

注意

Use NiladicFunction method.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use NiladicFunction method.")>]
abstract member Function : string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (name As String, returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

name: String

函数的名称。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

Function(String, String, Type, RelationalTypeMapping)

注意

Use NiladicFunction method.

创建一个表示 SQL 树中的函数调用的新 SqlFunctionExpression 。

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);

[System.Obsolete("Use NiladicFunction method.")]
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression Function (string schema, string name, Type returnType, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);

abstract member Function : string * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

[<System.Obsolete("Use NiladicFunction method.")>]
abstract member Function : string * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression
override this.Function : string * string * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlFunctionExpression

Public Overridable Function Function (schema As String, name As String, returnType As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlFunctionExpression

参数

schema: String

在其中定义函数的架构。

name: String

函数的名称。

returnType: Type

该表达式的 Type。

typeMapping: RelationalTypeMapping

RelationalTypeMapping与表达式关联的。

SqlFunctionExpression

表示 SQL 树中的函数调用的表达式。

实现

Function(String, String, Type, RelationalTypeMapping)

属性: ObsoleteAttribute

适用于

通过

SqlExpressionFactory.Function 方法

定义

重载

Function(String, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(String, String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(String, IEnumerable<SqlExpression>, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(SqlExpression, String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(SqlExpression, String, IEnumerable<SqlExpression>, Boolean, Boolean, IEnumerable<Boolean>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(String, IEnumerable<SqlExpression>, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(SqlExpression, String, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(String, Type, RelationalTypeMapping)

参数

返回

实现

适用于

Function(String, String, Type, RelationalTypeMapping)

参数

返回

实现

适用于

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