Sql server 游标循环次数不超过一次

我不熟悉SQL Server存储过程。。。我已经写了一个代码，这是不是循环正确，我相信

注意：我无法使用调试器，因此为了进行调试，我使用了打印命令（旧式）

我正在使用SQLServer2005

代码进入循环并只打印一次行，否则将循环并处理29条总计记录

PRINT 'check if rows are their or not for Adjusting X flags records Results 5 '

SELECT 
    td_clientcd , td_scripcd, cm_name, td_scripnm, 
    sum(td_bqty) td_qty,
    sum(td_sqty) td_sqty, 
    sum(td_bqty-td_sqty) net 
FROM 
    ##VX, Client_master with (nolock)  
WHERE
    td_clientcd = cm_cd  
    AND td_clientcd = @client_cd 
GROUP BY 
    td_clientcd, cm_name, td_scripcd, td_scripnm 
HAVING
    sum(td_bqty - td_sqty) <> 0 
ORDER BY 
    td_clientcd , td_scripcd  

DECLARE dataX_Cursor CURSOR FOR 
    SELECT  td_clientcd , td_scripcd,cm_name,td_scripnm, sum(td_bqty) td_bqty ,sum(td_sqty) td_sqty, sum(td_bqty-td_sqty) net FROM ##VX,Client_master with (nolock)  where td_clientcd = cm_cd  and  td_clientcd = @client_cd  group by td_clientcd,cm_name,td_scripcd,td_scripnm having sum(td_bqty - td_sqty) <> 0 ORDER BY td_clientcd , td_scripcd  

    OPEN dataX_Cursor

    PRINT 'i am at 144'
    DECLARE @tempSumQty INT -- has the qty of the Lower Side
    DECLARE @tempHigherSideFlag CHAR -- show which is the Higher side Sell (S) or Buy (B)

    FETCH NEXT FROM dataX_Cursor INTO @td_clientcode, @td_scripcode, @cm_name, @td_scripname, @td_buyqty, @td_sellqty, @net

    WHILE @@FETCH_STATUS = 0
    BEGIN
        --Example
            -- select * from ##VX where td_clientcd = '26555   ' and td_scripcd = '532804' and td_bsflag = 'B' and td_flag = 'N' order by td_dt desc,td_stlmnt desc
        -- update ##VX set td_flag = 'X' where td_srno = 308
        PRINT 'I am at 155'
        -- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

        if @td_buyqty > @td_sellqty
                BEGIN
            SET @tempSumQty = @td_sellqty -- Sets the sum of Lower side Qty
            SET @tempHigherSideFlag = 'B'
        END
        ELSE
                BEGIN
            SET @tempSumQty = @td_buyqty -- Sets the sum of Lower side Qty
            SET @tempHigherSideFlag = 'S'
        END  -- This will get the higher Side Qty

        PRINT @tempSumQty 
        PRINT @tempHigherSideFlag

        IF @td_buyqty = 0 OR @td_sellqty = 0 -- Just update the flag to X
                        BEGIN
                            -- select a single/multiple records and loop through it and see if 
                            PRINT 'in OR Condition of X flags'
                            DECLARE record_Cursor CURSOR FOR  
                            select * from ##VX where td_clientcd = @td_clientcode and td_scripcd = @td_scripcode and td_bsflag = @tempHigherSideFlag and td_flag = 'N' order by td_dt desc,td_stlmnt desc -- gets the records will needs to be marked X, which are from higher side.

                            OPEN record_Cursor

                            Fetch Next From record_Cursor Into @td_companycode ,@td_stlmnt,@td_clientcd , @td_scripcd, @td_dt, @td_srno, @td_bsflag,@td_bqty, @td_sqty, @td_rate, @td_marketrate,@td_flag,@td_scripnm,@td_desc
                            -- looping
                            While @@Fetch_Status = 0 
                                            BEGIN

                                                -- update the old record with a flag of X 
                                                update ##VX set td_flag = 'X'  where td_srno = @td_srno


                                                -- fetch next
                                                Fetch Next From record_Cursor Into @td_companycode ,@td_stlmnt,@td_clientcd , @td_scripcd, @td_dt, @td_srno, @td_bsflag,@td_bqty, @td_sqty, @td_rate, @td_marketrate,@td_flag,@td_scripnm,@td_desc
                                            END 

                            --Close record_Cursor
                            --Deallocate record_Cursor

            END -- End of Fetch

            -- if need to adjust the records with an insert and a update

            IF @td_buyqty <> 0 AND @td_sellqty <> 0 -- Adjust the record with an insert and update the flag to X
                    BEGIN
                        -- select a single/multiple records and loop through it and see if 
                        PRINT 'in AND Condition of X flags'
                        DECLARE record_Cursor CURSOR FOR  
                        select * from ##VX where td_clientcd = @td_clientcode and td_scripcd = @td_scripcode and td_bsflag = @tempHigherSideFlag and td_flag = 'N' order by td_dt desc,td_stlmnt desc -- gets the records will needs to be marked X, which are from higher side.

                        OPEN record_Cursor

                        Fetch Next From record_Cursor Into @td_companycode ,@td_stlmnt,@td_clientcd , @td_scripcd, @td_dt, @td_srno, @td_bsflag,@td_bqty, @td_sqty, @td_rate, @td_marketrate,@td_flag,@td_scripnm,@td_desc
                        -- looping
                        While @@Fetch_Status = 0 
                        BEGIN
                                                DECLARE @CurrentRowQty INT
                                        --  PRINT 'i am at 198 ' + CONVERT( VARCHAR(2), @tempHigherSideFlag )
                                                            IF @tempHigherSideFlag = 'S'
                                                                    BEGIN
                                                                        SET @CurrentRowQty = @td_sqty
                                                                    END
                                                            ELSE IF @tempHigherSideFlag = 'B'
                                                                        BEGIN
                                                                            SET @CurrentRowQty = @td_bqty
                                                                        END

                                                IF @tempSumQty > @CurrentRowQty
                                                                BEGIN 
                                                                    SET @tempSumQty = @tempSumQty - @CurrentRowQty
                                                                END
                                                ELSE
                                                        BEGIN
                                                        --  PRINT 'i am at 213 ' + CONVERT( VARCHAR(2), @tempHigherSideFlag )
                                                            IF @tempHigherSideFlag = 'S'
                                                                    BEGIN
                                                                        SET @td_sqty = @td_sqty - @tempSumQty
                                                                        insert into ##VX select td_companycode ,td_stlmnt,td_clientcd , td_scripcd, td_dt, td_bsflag, td_bqty, @tempSumQty, td_rate, td_marketrate,td_flag,td_scripnm,'' from ##VX where td_srno = @td_srno
                                                                        update ##VX set td_flag = 'X' ,td_sqty = @td_sqty where td_srno = @td_srno

                                                                    END
                                                            ELSE -- IF @tempHigherSideFlag = 'B'
                                                                    BEGIN
                                                                        SET @td_bqty = @td_bqty - @tempSumQty
                                                                        insert into ##VX select td_companycode ,td_stlmnt,td_clientcd , td_scripcd, td_dt, td_bsflag, @tempSumQty, td_sqty, td_rate, td_marketrate,td_flag,td_scripnm,'' from ##VX where td_srno = @td_srno
                                                                        update ##VX set td_flag = 'X' ,td_bqty = @td_bqty where td_srno = @td_srno
                                                                    END 
                                                        END -- end of else
                                -- fetch next
                                Fetch Next From record_Cursor Into @td_companycode ,@td_stlmnt,@td_clientcd , @td_scripcd, @td_dt, @td_srno, @td_bsflag,@td_bqty, @td_sqty, @td_rate, @td_marketrate,@td_flag,@td_scripnm,@td_desc

                            END 
                    --Close record_Cursor
                    --Deallocate record_Cursor  

                        END

                --  FETCH NEXT FROM dataX_Cursor INTO @td_clientcode, @td_scripcode, @cm_name, @td_scripname, @td_buyqty, @td_sellqty, @net

                END -- End of Fetch

---

我假设您的

select

返回超过一行，对吗？尝试保存@@Fetch\u状态到3个不同的变量，如下所示

Declare @dataXStatus Int
Declare @record1_status Int
...
FETCH NEXT FROM dataX_Cursor INTO ... 
SET @dataX_status = @@Fetch_status
WHILE @dataX_status = 0
...
  OPEN record_Cursor
  Fetch Next From record_Cursor INTO ....
  SET @record1_status = @@Fetch_status
  While @record1_status = 0
    ...
    Fetch Next From record_Cursor INTO ...
    SET @record1_status = @@Fetch_status
  end
  ...
  FETCH NEXT FROM dataX_Cursor INTO 
  SET @dataX_status = @@Fetch_status
end

---

等等。。。如果每个游标循环有不同的fetch_状态变量，您很快就会明白错误在您的过程中的位置。

您应该避免使用游标，并且在90%以上的情况下，您可以这样做。不要把精力放在让光标快速移动上，只要把它们扔掉就行了！您有一个详细的代码和3个嵌套游标。简化代码，除去循环所需的所有内容。仅保留打印命令。这样，您或其他任何人都可以调试您的代码。

Declare @dataXStatus Int
Declare @record1_status Int
...
FETCH NEXT FROM dataX_Cursor INTO ... 
SET @dataX_status = @@Fetch_status
WHILE @dataX_status = 0
...
  OPEN record_Cursor
  Fetch Next From record_Cursor INTO ....
  SET @record1_status = @@Fetch_status
  While @record1_status = 0
    ...
    Fetch Next From record_Cursor INTO ...
    SET @record1_status = @@Fetch_status
  end
  ...
  FETCH NEXT FROM dataX_Cursor INTO 
  SET @dataX_status = @@Fetch_status
end