| 一种适合于对象-关系模型的规则机制 |
| |
| 引用本文： | 邓江,李战怀.一种适合于对象-关系模型的规则机制[J].西北工业大学学报,2000,18(1):106-110. |
| |
| 作者姓名： | 邓江 李战怀 |
| |
| 作者单位： | 西北工业大学,计算机科学与工程系,陕西,西安,710072 |
| |
| 基金项目： | 国家 8 63计划资助!5 11- 94 6- 0 0 2 |
| |
| 摘 要： | 讨论了对象-关系数据库管理系统ANGEL的规则机制的实现，主要包括规则语义、规则的耦合模式、冲突处理、级联触发以及继承等；给出了ANGEL系统中规则的表示方法；描述了规则的触发算法。
|
| 关 键 词： | 数据库 对象－关系模型 规则机制 ANGEL 规则语义 |
| 文章编号： | 1000-2758(2000)01-0106-05 |
| 修稿时间： | 1998-03-06 |
A Rule Mechanism for an Object-Relational Database Management System |
| |
| Deng Jiang,Li Zhanhuai.A Rule Mechanism for an Object-Relational Database Management System[J].Journal of Northwestern Polytechnical University,2000,18(1):106-110. |
| |
| Authors: | Deng Jiang Li Zhanhuai |
| |
| Abstract: | We developed an ORDBMS ANGEL 1] . Its rule mechanism is much more flexible than traditional trigger mechanism, and its semantics is much more complex. In this paper, we present the semantics and implementation of the rule system of ANGEL. We first present the semantics of production rules in ANGEL in the following four aspects(section 2): coupling mode, conflict resolving, cascade firing, and rule inheritance. Then we constructed a special storage form of rules called Memory Active Form(MAF), as shown in figure 1, to improve the efficiency of rule management and manipulation, including rule inserting, updating, deleting, and querying (section 3). Such a form, to our best knowledge, has not been reported in the open literature. The rule mechanism has been implemented in SUN SPARC System. |
| |
| Keywords: | rule mechanism storag form of rules ORDBMS memory active form (MAF) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
