| 基于图的主动数据库规则模型E-RG |
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| 引用本文： | 徐长醒,刘云生,许贵平.基于图的主动数据库规则模型E-RG[J].华中科技大学学报(自然科学版),2000,28(11):31-33. |
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| 作者姓名： | 徐长醒 刘云生 许贵平 |
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| 作者单位： | 华中理工大学计算机科学与技术学院 |
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| 摘 要： | 针对两种典型的主动数据库系统HiPAC和Starburst系统中主动规则模型的不足，提出主动数据库的E-RG规则模型.该模型由规则间基本时序关系导出控制结构，形成高层次的主动规则，既支持CA规则的并发执行，又易于规范规则集的行为特性.同时给出由规则间基本时序关系导出S,Y与P的关系，并保证时间语义无损的转换算法.
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| 关 键 词： | 主动数据库 主动规则模型 并发性 |
| 文章编号： | 1000-8616(2000)11-0031-03 |
| 修稿时间： | 2000年5月21日 |
A Graph-Based Rule Model in Active Database Systems |
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| Abstract: | In order to overcome disadvantages of the rule models in active DB of HiPAC and Starburst, we present an E RG rule model and formally defined temporal semantic relationship among rules. An E RG rule contains the control structure of the corresponding CA rule, and the rule model have advantages of supporting C A rules parallel execution and easiness of controlling behaviors of rule sets. The algorithm, to transform the rule temporal graph into the rule graph with lossless semantics, has been also introduced. |
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| Keywords: | active database system active rule model parallel execution |
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