我正在尝试编写一个 mysql 函数......但我收到语法错误
ERROR 1064 (42000)：您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以获取在 ') 附近使用的正确语法；
我的代码如下所示，
delimiter //
CREATE FUNCTION calculateNetItemStandardDiscountAmount(productId INT,quantity INT) RETURNS DOUBLE
BEGIN
DECLARE discountPer DOUBLE;
DECLARE unitPrice DOUBLE;
DECLARE netItemDiscountAmount DOUBLE;
DECLARE netItemAmount DOUBLE;
SELECT `SellingUnitPrice` into unitPrice
FROM `TBL_PRODUCT_MASTER`
WHERE `Id` = productId;
SET netItemAmount = quantity * unitPrice ;
insert into debugtable select concat('ACTUAL AMOUNT ', netItemAmount);
SELECT discDetail.`DiscountPercentage` into discountPer
FROM `TBL_DISCOUNT_DETAIL` AS discDetail , `TBL_DISCOUNT` AS disc, TBL_PRODUCT_DISCOUNT AS prodDisc
WHERE disc.`DiscountStartDate` < NOW()
AND disc.`DiscountEndDate` > NOW()
AND disc.`SchemeType` = 'AMOUNT'
AND discDetail.DiscountId = disc.Id
AND prodDisc.productId = productId
AND prodDisc.discountId = disc.Id
AND prodDisc.`IsEnabled` = 1
AND disc.`IsEnabled` = 1
AND (quantity * unitPrice) >= discDetail.LowerLimit and (quantity * unitPrice) <= discDetail.HigherLimit);
insert into debugtable select concat('STD DISCOUNT PER BY AMOUNT ', discountPer);
IF (discountPer IS NOT NULL) THEN
SET netItemDiscountAmount = ((netItemAmount) * (discountPer * 0.01));
insert into debugtable select concat('APPLY VOLUME DISCOUNT ', netItemDiscountAmount);
END IF;
SELECT discDetail.`DiscountPercentage` into discountPer
FROM `TBL_DISCOUNT_DETAIL` AS discDetail , `TBL_DISCOUNT` AS disc, TBL_PRODUCT_DISCOUNT AS prodDisc
WHERE disc.`DiscountStartDate` < NOW()
AND disc.`DiscountEndDate` > NOW()
AND disc.`SchemeType` = 'VOLUME'
AND discDetail.DiscountId = disc.Id AND prodDisc.productId = productId
AND prodDisc.discountId = disc.Id
AND prodDisc.`IsEnabled` = 1
AND disc.`IsEnabled` = 1
AND (Quantity >= discDetail.LowerLimit and Quantity <= discDetail.HigherLimit);
insert into debugtable select concat('STD DISCOUNT PER BY VOLUME ', discountPer);
IF (discountPer IS NOT NULL) THEN
SET netItemDiscountAmount = netItemDiscountAmount + ((netItemAmount) * (discountPer * 0.01));
insert into debugtable select concat('APPLY AMOUNT DISCOUNT ', netItemDiscountAmount);
END IF;
RETURN netItemDiscountAmount;
END//
delimiter ;
任何帮助将不胜感激......在此先感谢......