我是MySQL存储过程的新手,需要制作一个MySQL存储过程来搜索具有多个列过滤器的产品列表。如果我没有发送带有值的所有参数,下面发布的代码将不会返回任何值。如果所有参数都为空,它应显示所有产品,并在发送其他参数时过滤结果。
DELIMITER $$
USE `537174_alsuper`$$
DROP PROCEDURE IF EXISTS `ListarProductos`$$
CREATE DEFINER=`537174_alsuper`@`%` PROCEDURE `ListarProductos`(
IN Token VARCHAR(50),
IN cID INT(11),
IN pID INT(11),
IN os INT(1),
IN productName VARCHAR(255)
)
BEGIN
DECLARE BaseToken VARCHAR(50);
SELECT TOKEN_VALUE INTO BaseToken FROM web_service_tokens WHERE 1 ORDER BY TOKEN_ID DESC LIMIT 1;
IF (Token = BaseToken) THEN
SELECT DISTINCT d.thumbnail, a.productID, a.name_en, a.categoryID, a.Price, a.description_en
FROM SC_products a, SC_product_pictures d
WHERE a.ordering_available='1' AND d.productID=a.productID AND
CASE
WHEN cID IS NOT NULL
THEN a.categoryID = cID
WHEN cID IS NULL
THEN 1 = 1
END
AND
CASE
WHEN pID IS NOT NULL
THEN a.productID = pID
WHEN pID IS NULL
THEN 1 = 1
END
AND
CASE
WHEN os IS NOT NULL
THEN a.on_special = os
WHEN os IS NULL
THEN 1 = 1
END
AND
CASE
WHEN productName IS NOT NULL
THEN a.name_en LIKE CONCAT('%',productName,'%')
WHEN productName IS NULL
THEN 1 = 1
END
ORDER BY a.name_en ASC;
END IF;
END$$
DELIMITER ;
有人能指出使用多列过滤器进行存储过程搜索的正确方法吗?
答案 0 :(得分:1)
这个怎么样:
SELECT DISTINCT d.thumbnail, a.productID, a.name_en, a.categoryID, a.Price, a.description_en
FROM SC_products a
INNER JOIN SC_product_pictures d ON d.productID = a.productID
WHERE a.ordering_available='1' AND
(cID IS NULL OR a.categoryID = cID) AND
(pID IS NULL OR a.productID = pID) AND
(os IS NULL OR a.on_special = os) AND
(productName IS NULL OR a.name_en LIKE CONCAT('%', productName, '%'))