Question

在将表类型用作存储过程中的参数时遇到麻烦。

This is my table type:
CREATE TYPE [dbo].[ TableTypeMyValue] AS TABLE(
    [MyValue] [nvarchar](50) NULL
)
GO

我需要从c＃传递@MyValue：

 @BCID nvarchar(20),
@MyValue TableTypeMyValue READONLY


AS  
BEGIN


SET NOCOUNT ON  

SELECT IIF (EXISTS (SELECT bcc.BCID, ocv.CAID, ocv.CAValue
FROM BCTWO AS ocv
INNER JOIN BCONE AS bcc ON bcc.MyValue = ocv.MyValue
WHERE ocv.MyValue = @MyValue  AND bcc.[Part of the key] = 1 AND bcc.BCID = @BCID), 1, NULL)

END

这是我得到的错误：

    `Must declare the table variable @MyValue`.

我认为表类型参数有些问题。我没有正确使用它。有人可以帮忙吗？

谢谢！

Answer 1

You need to treat @CharacteristicValue as a table, not the same as a scalar variable. You should probably join to it and have ocv.CharacteristicValue = @CharacteristicValue instead be an ON condition that references the CharacteristicValue column within the table.

Answer 2

您正在尝试使用表类型参数，例如标量参数，特别是：

ocv.CharacteristicValue = @CharacteristicValue

您需要使用JOIN或EXISTS子句。例如：

WHERE EXISTS (SELECT 1
              FROM @CharacteristicValue CV
              WHERE CV.CharacteristicValue = ocv.CharacteristicValue)

程序中的抛物线

2 个答案: