多态查询和笛卡尔积
Polymorphic Query and Cartesian Product
在 Hibernate 用户指南中，example "Example 182. Join Table polymorphic query" 处有一条注释
Polymorphic queries can create Cartesian Products, so caution is
advised.
有人可以解释笛卡尔积在这样的用例中是如何发生的吗？
这不是正确的说法。我创建了 HHH-11175 Jira 问题，我将修复它。
我要将该短语更改为：
The joined table inheritance polymorphic queries can use several JOINS
which might affect performance when fetching a large number of
entities.
在 Hibernate 用户指南中，example "Example 182. Join Table polymorphic query" 处有一条注释
Polymorphic queries can create Cartesian Products, so caution is advised.
有人可以解释笛卡尔积在这样的用例中是如何发生的吗？
这不是正确的说法。我创建了 HHH-11175 Jira 问题，我将修复它。
我要将该短语更改为：
The joined table inheritance polymorphic queries can use several JOINS which might affect performance when fetching a large number of entities.