| 一个具有语义优化的分布式查询处理算法 |
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| 引用本文： | 黄小蓓,张国根.一个具有语义优化的分布式查询处理算法[J].暨南大学学报,1988(3). |
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| 作者姓名： | 黄小蓓 张国根 |
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| 作者单位： | 暨南大学计算机科学系，暨南大学计算机科学系 |
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| 摘 要： | 本文描述一个分布式关系数据库系统中具有语义优化的查询处理算法。算法的基本过程是:从原查询转换到查询图同时进行副本选择,得到T-图,经一般优化、语义优化,进而产生查询处理策略。优化的目标是总处理代价最小。语义变换过程应用了启发式的控制策略。
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| 关 键 词： | 分布式数据库 查询优化 语义优化 联接 半联接 |
An Algorithm for Distributed Query Processing With Semanantic Optimization |
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| Huang Xiaobei,Zhang Guogen.An Algorithm for Distributed Query Processing With Semanantic Optimization[J].Journal of Jinan University(Natural Science & Medicine Edition),1988(3). |
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| Authors: | Huang Xiaobei Zhang Guogen |
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| Abstract: | In this paper, we describe an algorithm,for query processing with semantic optimization in distributed relational database systems.The optimization objective is to minimize the total processing cost, A heuristic control policy is used in the semantic transformation process. The representation of semantical information and semantic transformation process can be combined with different cost measurements and optimization objectives. |
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| Keywords: | Distributed database Query optimization Semantic optimization Join Semijoin |
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