分布式数据库管理系统中主动机制的设计与实现

DESIGN AND IMPLEMENTATION OF ACTIVE MECHANISMS IN A DISTRIBUTED DATABASE MANAGEMENT SYSTEM

文中首先介绍了具有客户／服务器结构的分布式数据库管理系统ＤＨＤＢ，讨论了ＤＨＤＢ中主动机制的设计与实现技术．根据主动规则的语义及形式描述拟定了主动规则语言，提出了主动规则的三级存储模式，最后详细描述了分布式环境下主动规则的触发过程．

A distributed database management system——DHDB is presented, which has Client/Server architecture. The design and the implementing technique of active mechanisms in DHDB are discussed. According to semantics and formal descriptions of active rules, an active rule language is devised. A three level storage model in storing rules is introduced. Finally, the trigger process of active rules in a distributed environment is described in detail.