Question

我在存储过程中使用游标。我必须使用背对背2个游标（不是嵌套）。这是我的代码：

app.get('/profile',
  require('connect-ensure-login').ensureLoggedIn(),
  (req, res) => {
    User.find((err, allUsers) => {
      if (err) {
        res.send('Error: ' + err);
      } else if (allUsers.length === 0) {
        res.send('No users.');
      } else {
        res.render('profile', {user: req.user, allUsers: allUsers});
      }
    });
  });

之后我立即使用第二个光标：

DECLARE cur CURSOR LOCAL FOR 
     SELECT 
         [Account Id], [Op. Balance], [Cr/Dr], [Total Cr.], [Total Dr.], Balance, [Balance Cr/Dr] 
     FROM 
         AccountBalance(@fld_fy_id)

OPEN cur

FETCH NEXT FROM cur INTO @ACCOUNT_ID, @OPBAL, @OPCRDR, @TOTALCR, @TOTALDR, @CLBAL, @CLCRDR

WHILE @@FETCH_STATUS = 0
BEGIN
    INSERT INTO tbl_account_balance_history (fld_fy_id, fld_account_id, fld_opening_balance, fld_op_cr_dr, fld_total_cr, fld_total_dr, fld_closing_balance, fld_cl_cr_dr, fld_is_active, fld_is_delete, fld_created_by)
    VALUES(@fld_fy_id, @ACCOUNT_ID, @OPBAL, @OPCRDR, @TOTALCR, @TOTALDR, @CLBAL, @CLCRDR, 1, 0, @fld_created_by)

    FETCH NEXT FROM cur INTO @ACCOUNT_ID, @OPBAL, @OPCRDR, @TOTALCR, @TOTALDR, @CLBAL, @CLCRDR
END

CLOSE cur
DEALLOCATE cur

但是在第二个游标中，我得到DECLARE cur CURSOR LOCAL FOR SELECT [Product Id], Batch, [Opening Qty.], [Receipt Qty.], [Issue Qty.], [Closing Qty.], [Opening Amt.], [Receipt Amt.], [Issue Amt.], [Closing Amt.] FROM ProductBatchwiseStock(@fld_fy_id, @FROM_DATE, @TO_DATE) OPEN cur FETCH NEXT FROM cur INTO @PRODUCT_ID, @BATCH, @OPQTY, @RCQTY, @ISSQTY, @CLQTY, @OPAMT, @RCAMT, @ISSAMT, @CLAMT WHILE @@FETCH_STATUS = 0 BEGIN INSERT INTO tbl_productwise_stock_history (fld_fy_id, fld_product_id, fld_batch, fld_opening_qty, fld_receipt_qty, fld_issue_qty, fld_closing_qty, fld_opening_amt, fld_receipt_amt, fld_issue_amt, fld_closing_amt, fld_is_active, fld_is_delete, fld_created_by) VALUES(@fld_fy_id, @PRODUCT_ID, @BATCH, @OPQTY, @RCQTY, @ISSQTY, @CLQTY, @OPAMT, @RCAMT, @ISSAMT, @CLAMT, 1, 0, @fld_created_by) FETCH NEXT FROM cur INTO @PRODUCT_ID, @BATCH, @OPQTY, @RCQTY, @ISSQTY, @CLQTY, @OPAMT, @RCAMT, @ISSAMT, @CLAMT END CLOSE cur DEALLOCATE cur，因此该部分未被执行。我认为@@FETCH_STATUS = -1正在返回上一个游标状态。

Answer 1

@@FETCH_STATUS具有全局范围，并保存在SQL Server中运行的所有游标的状态。因此，它可能会从同时运行的另一个游标进行更新。因此，它可能会返回光标循环中另一个光标提取的状态。

如果您可以在不使用任何游标的情况下完成相同的工作，建议避免使用游标。

为了您的帮助，请使用以下语句来完成您的任务：

INSERT INTO tbl_account_balance_history (fld_fy_id, fld_account_id, fld_opening_balance, fld_op_cr_dr, fld_total_cr, fld_total_dr, fld_closing_balance, fld_cl_cr_dr, fld_is_active, fld_is_delete, fld_created_by)
SELECT @fld_fy_id, [Account Id], [Op. Balance], [Cr/Dr], [Total Cr.], [Total Dr.], Balance, [Balance Cr/Dr], 1, 0, @fld_created_by 
FROM AccountBalance(@fld_fy_id)

INSERT INTO tbl_productwise_stock_history (fld_fy_id, fld_product_id, fld_batch, fld_opening_qty, fld_receipt_qty, fld_issue_qty, fld_closing_qty, fld_opening_amt, fld_receipt_amt, fld_issue_amt, fld_closing_amt, fld_is_active, fld_is_delete, fld_created_by)
SELECT @fld_fy_id, [Product Id], Batch, [Opening Qty.], [Receipt Qty.], [Issue Qty.], [Closing Qty.], [Opening Amt.], [Receipt Amt.], [Issue Amt.], [Closing Amt.] , 1, 0, @fld_created_by)
FROM ProductBatchwiseStock(@fld_fy_id, @FROM_DATE, @TO_DATE)

SQL Server Cursor @@ FETCH_STATUS == -1

1 个答案: