| 一种关系数据库系统中主动规则的实现策略 |
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| 引用本文： | 冯玉才,何英华.一种关系数据库系统中主动规则的实现策略[J].华中科技大学学报(自然科学版),1999(10). |
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| 作者姓名： | 冯玉才 何英华 |
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| 作者单位： | 华中理工大学计算机科学与技术学院 |
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| 摘 要： | 在关系数据库系统ＤＭ２ 的基础上，提出了一种实用的主动规则语法定义和语义执行模型，在事件定义中加入了时间事件，给出了加入主动规则后的数据库系统的体系结构，以及在创建规则时，为了保证规则执行的可终止性，用于分析规则之间触发关系的三个原则
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| 关 键 词： | 主动数据库系统 E-CA规则 规则执行语义 |
The Implementation of Active Rule in a Relational Database System |
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| Feng Yucai He Yinghua Feng Yucai Prof., College of Computer Sci. & Tech.,HUST,Wuhan ,China..The Implementation of Active Rule in a Relational Database System[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1999(10). |
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| Authors: | Feng Yucai He Yinghua Feng Yucai Prof College of Computer Sci & Tech HUST Wuhan China |
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| Institution: | Feng Yucai He Yinghua Feng Yucai Prof., College of Computer Sci. & Tech.,HUST,Wuhan 430074,China. |
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| Abstract: | Practical definition of E CA rule and a model for rule execution semantics based on DM2 database system are proposed. In the definition of event, temporal event is added in order to give better practicality of the system. The architecture of the database system with the active rules added is given. In order to guarantee the terminability of the rule execution and to analyze the trigging relations between the rules, three simple principles are provided. |
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| Keywords: | active database system E CA rule rule execution semantic |
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