Question

我想要返回表函数，但错误是

在函数中无效使用副作用运算符'INSERT EXEC'。

我的代码：

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的过程。 https://docs.microsoft.com/en-us/sql/relational-databases/user-defined-functions/create-user-defined-functions-database-engine

我不明白为什么你需要动态。尝试

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

如果参数应该代表一个列表，那么你最好使用UDT。 https://docs.microsoft.com/en-us/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)) ;

并将其用作参数

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

如何在不使用存储过程的情况下在表函数中返回值exec？

1 个答案: