| ORDBMS的继承语义及其实现 |
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| 引用本文： | 李红燕,李战怀,徐秋元.ORDBMS的继承语义及其实现[J].计算机辅助设计与图形学学报,2000,12(2):116-120. |
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| 作者姓名： | 李红燕 李战怀 徐秋元 |
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| 作者单位： | 西北工业大学计算机系,西安,710072 |
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| 基金项目： | 国家“八六三”计划项目! ( 86 3 5 11 96 11 0 0 7)，国家自然科学基金项目! ( 6 9473 0 42 ) |
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| 摘 要： | 介绍了在ＡＮＧＥＬ这样一个典型的ＯＲＤＢ系统中继承机制的设计思想与实现技术，首先详细阐述系统卡富的继承语义，包括属性继承、约束继承、触发器继承及函数继承，并给出对多重继承所带来各种冲突的处理办法。然后讨论继承机制的实现手段及有关继承机制的模式演变问题。
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| 关 键 词： | 子类 ORDBMS 继承语义 数据库系统 |
| 修稿时间： | 1998-09-15 |
The Semantics and Implementation of Inheritance in ORDBMS |
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| LI Hong-Yan,LI Zhan-Huai,XU Qiu-Yuan.The Semantics and Implementation of Inheritance in ORDBMS[J].Journal of Computer-Aided Design & Computer Graphics,2000,12(2):116-120. |
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| Authors: | LI Hong-Yan LI Zhan-Huai XU Qiu-Yuan |
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| Abstract: | This paper describes the design and implementation of inheritance mechanism in ANGEL, which is a typical ORDBMS. We lay stress on the abundance of semantics about attribute inheritance, attribute constraint inheritance, trigger inheritance and function inheritance. The resolution to different kinds of conflict and schema modification brought forth by multiple inheritance are also discussed. |
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| Keywords: | inheritance superclass subclass multiple inheritance inheritance conflict schema modification |
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