CAJ | 학술논문

主动机制是实时数据库管理系统(DBMS)的一个重要功能。在主动机制的基础上，实时DBMS能够根据数据库中某些数据及环境的变化，主动地作出一定的反应，执行预先设计的动作，而不仅仅是被动地执行用户的命令。文中主要介绍一个实时DBMS的主动子系统，采用事件-条件-动作的规则来实现其主动功能；讨论了规则的表示和存储结构，规则子系统的系统结构及与DBMS的联系；并详细介绍了条件评价器、规则检索优化、规则冲突、规则递归触发等处理和实现的方法及技术。
주동궤제시실시수거고관리계통(DBMS)적일개중요공능。재주동궤제적기출상，실시DBMS능구근거수거고중모사수거급배경적변화，주동지작출일정적반응，집행예선설계적동작，이불부부시피동지집행용호적명령。문중주요개소일개실시DBMS적주동자계통，채용사건-조건-동작적규칙래실현기주동공능；토론료규칙적표시화존저결구，규칙자계통적계통결구급여DBMS적련계；병상세개소료조건평개기、규칙검색우화、규칙충돌、규칙체귀촉발등처리화실현적방법급기술。
The active mechanism is an important function of real-time databases. Based on the active mechanism, real-time DBMS can actively execute some actions defined in advanced when the data in database or the environment are changed. This paper introduces an active subsystem of real-time DBMS, which uses the rules of the event-condition-action to implement its active function. The paper discusses the representation and storage structure of the rules, the subsystem structure and the relation between the subsystem, and DBMS presents emphatically the methods and the techniques of dealing with and implementing the condition evaluator, search optimization of rules, rule conflict, and recursive trigger of rules.