Question

表tblidset在第一次运行时不包含任何内容，然后当我第一次在我的代码中调用此存储过程时，它应该从表中获取最高值，以便稍后在程序数据上构建该值增长。让我烦恼的问题是它在第一次运行时总是返回0。坚持了几个小时，现在傻眼了。关心帮忙？这是我的剧本：

CREATE PROCEDURE CREATENEWID
@TYPE AS INT
AS
BEGIN

DECLARE @CNT AS INT;
DECLARE @DOCNO AS BIGINT;
DECLARE @DOCID AS BIGINT;
SELECT @CNT = ISNULL(COUNT(*),0) FROM TBLIDSET

--CHECK IF THERE IS NO VALUE AS OF DATE AND INSERT DEFAULT VALUES
    IF @CNT = 0

    BEGIN

        INSERT INTO TBLIDSET SELECT TOP 1(DOCID),0 FROM INVHDR ORDER BY DOCID DESC
    END
    DECLARE @NUM AS INT;
    IF @TYPE = 1
        BEGIN
            UPDATE TBLIDSET SET DOCID = DOCID +1
            SELECT @NUM = DOCID FROM TBLIDSET
        END
    ELSE
        BEGIN
            UPDATE TBLIDSET SET DOCNO = DOCNO + 1
            SELECT @NUM = DOCNO FROM TBLIDSET
    END
    PRINT @NUM
    RETURN @NUM

END
GO

Answer 1

请尝试此代码。我将输出参数添加到您的代码中。

CREATE PROCEDURE CREATENEWID
@TYPE AS INT,
@NUM AS INT OUT  --Declare ouput parameter here
AS
BEGIN

DECLARE @CNT AS INT;
DECLARE @DOCNO AS BIGINT;
DECLARE @DOCID AS BIGINT;
SELECT @CNT = ISNULL(COUNT(*),0) FROM TBLIDSET

--CHECK IF THERE IS NO VALUE AS OF DATE AND INSERT DEFAULT VALUES
    IF @CNT = 0

    BEGIN

        INSERT INTO TBLIDSET SELECT TOP 1(DOCID),0 FROM INVHDR ORDER BY DOCID DESC
    END
    --Move your @NUM to output parameter
    IF @TYPE = 1
        BEGIN
            UPDATE TBLIDSET SET DOCID = DOCID +1
            SELECT @NUM = DOCID FROM TBLIDSET
        END
    ELSE
        BEGIN
            UPDATE TBLIDSET SET DOCNO = DOCNO + 1
            SELECT @NUM = DOCNO FROM TBLIDSET
    END
    PRINT @NUM
    RETURN @NUM

END
GO

我的存储过程始终返回0

1 个答案: