Question

我们有4个表关系，2个主表 - “资产”和“产品”，通过表 - “assets_products”和产品/价格关系。以下是仅包含相关字段的表格的要点：

资产

+----------------------------------+--------------+------+-----+---------------------+-----------------------------+
| Field                            | Type         | Null | Key | Default             | Extra                       |
+----------------------------------+--------------+------+-----+---------------------+-----------------------------+
| id                               | int(11)      | NO   | PRI | NULL                | auto_increment              |
| in_store                         | tinyint(4)   | YES  |     | 0                   |                             |
| isbn                             | varchar(32)  | YES  | MUL | NULL                |                             |
+----------------------------------+--------------+------+-----+---------------------+-----------------------------+

产品;

+------------------------+---------------+------+-----+---------------------+-----------------------------+
| Field                  | Type          | Null | Key | Default             | Extra                       |
+------------------------+---------------+------+-----+---------------------+-----------------------------+
| id                     | int(11)       | NO   | PRI | NULL                | auto_increment              |
| sku                    | varchar(40)   | YES  | UNI | NULL                |                             |
| type                   | varchar(30)   | YES  |     | NULL                |                             |
| asset_id               | int(11)       | YES  |     | NULL                |                             |
| in_store               | tinyint(4)    | NO   | MUL | 0                   |                             |
| parent_id              | int(11)       | YES  | MUL | NULL                |                             |
+------------------------+---------------+------+-----+---------------------+-----------------------------+

assets_products;

+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+
| asset_id   | int(11)  | NO   | MUL | 0       |                |
| product_id | int(11)  | NO   | MUL | 0       |                |
+------------+----------+------+-----+---------+----------------+

价格;

+----------------------+--------------+------+-----+---------+----------------+
| Field                | Type         | Null | Key | Default | Extra          |
+----------------------+--------------+------+-----+---------+----------------+
| price                | decimal(8,2) | NO   |     | 0.00    |                |
| currency             | varchar(3)   | NO   | MUL | USD     |                |
| effective_begin_date | datetime     | YES  |     | NULL    |                |
| effective_end_date   | datetime     | YES  |     | NULL    |                |
| priceable_id         | int(11)      | YES  | MUL | NULL    |                |
| priceable_type       | varchar(255) | YES  | MUL | NULL    |                |
+----------------------+--------------+------+-----+---------+----------------+

第一个关系称为单一关系，这里是关系的摘要：

资产/产品中的一对一资产通过assets_products
产品类型设置为“单个”，assets.isbn匹配products.sku

第二种关系称为租赁/演示关系：

产品类型为“Rental”或“Demo”
将products.parent_id设置为“父”产品的ID，该产品是单一关系（资产/产品通过assets_products一对一匹配）

第三种关系称为包

一个包是以上所有（单打，单打+出租或演示）的集合，他们可以被视为包的“孩子”
包可以通过assets_products表中与Package的product_id匹配的所有asset_id访问它的“children”。

每个产品都通过prices.pricable_id = products.id和prices.pricable_type = products.type（包裹或产品）链接到价格表，我们需要显示有效价格的产品

 prices.effective_begin_date <= 'today' AND prices.effective_end_date >= '2020-23-01'

推动此查询的其他主要标准是Singles有cached_product_in_store = 1且产品有和in_store = 1。

现在，进退两难。我试图通过asset.title和products.name在一个查询中搜索所有搜索，疯狂看起来像这样：

SELECT 
    a1.id AS aid, p1.id AS pid, p1.type, p1.in_store as pin_store, a1.cached_product_in_store, p1.parent_id, a1.title, p1.name
FROM assets a1
INNER JOIN (assets_products, products p1, prices) ON
     p1.id = assets_products.product_id AND
     a1.id = assets_products.asset_id AND
     p1.id = prices.priceable_id AND
     prices.effective_begin_date <= '2013-23-01' AND
     prices.effective_end_date >= '2020-23-01' AND
     prices.priceable_type IN ('Product', 'Package') AND
     prices.currency = 'USD'
WHERE 
    (CASE
        WHEN ((p1.type='Rental' OR p1.type='Demo') AND p1.parent_id IS NOT NULL) THEN (p1.in_store=(SELECT in_store FROM products p2 WHERE p1.parent_id=p2.id AND p2.in_store=1)) AND
            (LOWER(p1.name) LIKE '%Global%' AND LOWER(p1.name) LIKE '%History%' AND LOWER(p1.name) LIKE '%&%' AND LOWER(p1.name) LIKE '%Geography%')
        WHEN (p1.type='Package') THEN (p1.in_store=1) AND
            (LOWER(p1.name) LIKE '%Global%' AND LOWER(p1.name) LIKE '%History%' AND LOWER(p1.name) LIKE '%&%' AND LOWER(p1.name) LIKE '%Geography%')
        WHEN (p1.type='Single') THEN (a1.cached_product_in_store=1) AND
            (LOWER(a1.title) LIKE '%Global%' AND LOWER(a1.title) LIKE '%History%' AND LOWER(a1.title) LIKE '%&%' AND LOWER(a1.title) LIKE '%Geography%')
    END)
GROUP BY p1.id

它很接近，但GROUP BY p1.id使查询的执行时间加倍。

有什么想法吗？

优化这个疯狂的多表连接查询

0 个答案: