2022年1月10日
11 ODB Session 会话
摘要： A session is an application's unit of work that may encompass several database transactions. In this version of ODB a session is just an object cache. 阅读全文
posted @ 2022-01-10 10:09 菜鸟_IceLee 阅读(146) 评论(0) 推荐(0)
10 ODB Views 视图
摘要： An ODB view is a C++ class or struct type that embodies a light-weight, read-only projection of one or more persistent objects or database tables or t 阅读全文
posted @ 2022-01-10 10:00 菜鸟_IceLee 阅读(276) 评论(0) 推荐(0)
9 ODB Sections
摘要： ODB sections are an optimization mechanism that allows us to partition data members of a persistent class into groups that can be separately loaded an 阅读全文
posted @ 2022-01-10 09:21 菜鸟_IceLee 阅读(145) 评论(0) 推荐(0)
8 ODB 继承 （Inheritance）
摘要： In C++ inheritance can be used to achieve two different goals. We can employ inheritance to reuse common data and functionality in multiple classes. F 阅读全文
posted @ 2022-01-10 09:06 菜鸟_IceLee 阅读(182) 评论(0) 推荐(0)