...ic O/R Mapping) Types 集合映射(Collection mappings) 关联关系映射 组件(Component)映射 继承映射(Inheritance Mapping) 与对象共事 Read-only entitie
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inheritance and gene mapping 遗传和基因定位
Although inheritance mapping is part of domain objects, we treat it separately due to its importance.
尽管继承映射是领域对象的一部分,出于它的重要性我们将它单独出来。
Chapter 9 "Inheritance Mapping" in HRD [1] already has good coverage, so we will focus on SQL generation and tuning recommendations for each strategy.
hrd[1]中的第9章“继承映射”已经说得很清楚了,所以我们将关注SQL生成和针对每个策略的调优建议。
There are three fundamental solutions for mapping inheritance into a relational database, and to understand them I will discuss the trade-offs of mapping the class diagram presented in Figure 1.
将继承映射到关系数据库中有三种基本解决办法,为更好地理解它们,我将讨论在图1中显示的映射类图表的优缺点。
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