sql-server - SQL Proc 'Conversion failed' 从 varchar 到 int。为什么转换？

Question

我的问题是……为什么要从 varchar 转换为 int？我不确定它要做什么

CREATE PROCEDURE #myTestProcedure 
(
    @TransId VARCHAR(15)
) 
AS
BEGIN
    DECLARE @Result VARCHAR(15);

WITH TestCTE (TransId, AdjRefTransId) AS
(
    SELECT TRANSID, ADJREFTRANSID
    FROM dbo.MyTable
    WHERE TRANSID = @TransId

    UNION ALL

    SELECT pet.TRANSID, pet.ADJREFTRANSID
    FROM dbo.MyTable AS pet
    JOIN TestCTE
        ON TestCTE.ADJREFTRANSID = pet.TRANSID
)

SELECT @Result = 
(
    SELECT MAX(MyResult)
    FROM dbo.MyOtherTable
    WHERE TRANSID = TestCTE.TRANSID
)        
FROM TestCTE
WHERE TestCTE.ADJREFTRANSID = ''

RETURN @Result
END

EXEC dbo.#myTestProcedure @TransId = 'MyTransId'

错误:

Msg 245, Level 16, State 1, Procedure #myTestProcedure  0004C61A, Line 32
Conversion failed when converting the varchar value 'MyResult' to data type int.

我看不到它试图在何处进行此转换。第 32 行是一个空行。那里没有代码。

Answer 1

这是你的返回。存储过程返回一个整数来指示执行状态，而不是返回值。您需要选择 @Result 或将 @Result 作为输出参数。