我在电子商务商店存储过程中遇到了递归搜索的棘手问题。基本上,这个单一过程将返回所有产品,包括基本过滤器和分页,并使用父/子类别表执行层次结构的递归检查。这很好用,而且 CTE 的运行速度非常快,但是最近添加的关键字搜索需要跨类别名称、产品名称和样式编号进行搜索,这引起了戏剧性的影响。
起初这似乎很简单,因为第一个 CTE 已经根据提供的 @categoryid 生成了层次结构中所有相关类别的表,然后连接到其余产品特定表以进行所有过滤。产品名称和样式编号搜索工作正常,但我无法在我的一生中获得类别名称搜索,因为它需要从顶部开始搜索类别树以查找层次结构树中的任何匹配项。
编辑:我现在认为,针对产品添加一个“标签”表可能会容易得多,该表存储所有与关键字相关的标签,如类别名称、产品名称和样式等,并直接针对标签进行搜索。
例如,类别层次结构的子集如下所示:
Mens
- Polos
- Jerseys
- Pants
Womens
- Pants
- Shirts
- Polos
Supporters
- State Of Origin
- Mens
- Womens
- Kids
- Bulldogs
- Jerserys
- Pants
- Shirts
- Caps
- Warratahs
在下面的示例代码中,我传递了一个搜索词“原产地男装”,它应该返回“原产国”类别中的所有产品,这些产品也属于“男装”类别。它唯一匹配的是以“Origin”开头的产品名称,没有别的,因为产品级别的类别不是“原产国”,因为这是父级。这里的任何帮助都会很棒!
-- Variable Declarations
DECLARE @categoryid int
DECLARE @minprice int
DECLARE @maxprice int
DECLARE @sizefilter int
DECLARE @colourfilter int
DECLARE @searchstring varchar(255)
DECLARE @totalrows int
-- Variables values for testing
SET @categoryid = 0
SET @minprice = 0
SET @maxprice = 0
SET @sizefilter = 0
SET @colourfilter = 0
SET @searchstring = 'origin mens'
-- Setup paging table
DECLARE @indextable table (rownum int identity(1,1), recordid int);
BEGIN
-- First run CTE recursively over all categories in hierarchy
;WITH categoryCTE AS (
SELECT cat.id as CategoryId, cat.name as CategoryName
FROM dbo.shopcategory AS cat
WHERE (@categoryid = 0 OR cat.id = @categoryid)
AND cat.isenabled = 1
UNION ALL
SELECT child.id as CategoryId, child.name as CategoryName
FROM dbo.ShopCategory AS child
INNER JOIN categoryCTE AS parent
ON child.parentid = parent.CategoryId
WHERE child.isenabled = 1
),
-- Now join CTE onto products tables via linker product_shopcategory
productsCTE AS (
SELECT p.id, ppc.shopcategoryid, ppc.listorder as catlistorder
FROM categoryCTE as cat
INNER JOIN product_shopcategory ppc ON ppc.shopcategoryid = cat.CategoryId
INNER JOIN product p ON ppc.productid = p.id
INNER JOIN productlocality pl ON pl.productid = p.id
-- ** SEARCH - Join List to Table function of keywords
INNER JOIN dbo.udf_parseList(@searchString, ' ') s
ON (cat.CategoryName + p.Name + p.stylenumber LIKE '%' + s.array_Value + '%')
LEFT JOIN product_quantity pq ON pq.productid = p.id AND pq.localityid = @localityid
LEFT JOIN productcolour pc ON pc.productid = p.id
LEFT JOIN productcolourswatch pcs ON pc.productcolourswatchid = pcs.id
LEFT JOIN product_productsize pps ON pps.productid = p.id
LEFT JOIN productsize ps ON pps.productsizeid = ps.id
WHERE p.isenabled = 1
AND pq.quantity > 1
AND (pc.isenabled IS NULL OR pc.isenabled = 1)
AND (@minprice = 0 OR pl.price >= @minprice)
AND (@maxprice = 0 OR pl.price <= @maxprice)
-- Colour Group Filters
AND (@colourfilter = 0
OR
(pcs.swatchgroupid = @colourfilter AND (pq.productcolourid = pc.id AND pq.quantity > 0))
)
-- Size Group Filters
AND (@sizefilter = 0
OR
(ps.sizegroupid = @sizefilter AND (pq.productsizeid = pps.productsizeid AND pq.quantity > 0))
)
)
-- Create Paging table of results and strip out duplicates with group by
INSERT INTO @indextable (recordid)
SELECT DISTINCT id
FROM productsCTE
GROUP BY id
ORDER BY id;