This paper introduces a model of active database, in which EGA rule and a model for events and realize ways, then discuss a detection framework based on relative database, It also investigates the corresponding optimization strategies.

• 介绍了主动数据库系统的模型、ECA规则和事件模型及实现途径,并讨论了在关系模式下主动数据库系统的基本监测框架和事件机制的优化策略。