如何在不使用存儲過程的情況下在表函數中返回值exec？

Question

我想要返回表功能，但錯誤是

在函數中無效使用副作用運算符“ INSERT EXEC”。

我的代碼：

CREATE FUNCTION [dbo].[Fn_GetTable] 
     (@ID AS NVARCHAR(MAX))
RETURNS 
      @Tbl TABLE (ID NVARCHAR(MAX)) 
AS
BEGIN
    DECLARE @str AS NVARCHAR(MAX)

    SET @str = 'SELECT * FROM support WHERE support IN ('+@ID+')'

    INSERT INTO @Tbl (ID)
        EXEC sp_executesql @str

    RETURN 
END

Answer 1

UDF中禁止包含sp_executesql過程。 https://docs.microsoft.com/en-us/sql/relational-databases/user-defined-functions/create-user-defined-functions-database-engine

我不明白您為什么需要動態。 嘗試

Create FUNCTION [dbo].[Fn_GetTable] (
 @ID as nvarchar(MAX)
)
RETURNS 
@Tbl TABLE (
 ID nvarchar(MAX)
) AS
BEGIN

    INSERT INTO  @Tbl (ID)
    select * 
    from support  
    where support in (@ID)

RETURN 
END

如果參數應該表示一個列表，則最好使用UDT。 https://docs.microsoft.com/zh-cn/sql/relational-databases/clr-integration-database-objects-user-defined-types/working-with-user-defined-types-in-sql-server 。 演示

CREATE TYPE dbo.UDT_IDS AS TABLE (ID  NVARCHAR(MAX)) ;

並將其用作參數

CREATE FUNCTION [dbo].[Fn_GetTable] (
 @IDS as dbo.UDT_IDS READONLY
)
RETURNS 
@Tbl TABLE (
 ID NVARCHAR(MAX)
) AS
BEGIN

    INSERT INTO  @Tbl (ID)
    SELECT support 
    FROM support  
    WHERE support in (SELECT ID FROM @IDS)

RETURN 
END