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。
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.
出处
《华中理工大学学报》
CSCD
北大核心
1999年第10期50-52,共3页
Journal of Huazhong University of Science and Technology
