使用路径索引优化面向对象查询

[1992 Proceedings] Second International Workshop on Research Issues on Data Engineering: Transaction and Query Processing Pub Date : 1992-02-02 DOI:10.1109/RIDE.1992.227413

E. Bertino, C. Guglielmina

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引用次数: 17

摘要

本文研究了面向对象数据库中嵌套谓词的高效求值问题。作者之前引入了路径索引的概念(E. Bertino et al.， 1989)，它将嵌套属性的值与给定聚合层次结构的类根实例关联起来。他们在包含单个谓词的查询情况下评估路径索引的性能。这里，他们考虑在包含多个谓词的更一般查询框架中使用路径索引

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Optimization of object-oriented queries using path indices

This paper addresses the problem of efficiently evaluating nested predicates in object-oriented databases. The authors have previously introduced the notion of path index (E. Bertino et al., 1989) that associates the values of a nested attribute with the instances of the class root of a given aggregation hierarchy. They evaluated the performance of the path index in the case of queries containing a single predicate. Here they consider the usage of the path index in the framework of more general queries containing several predicates.<>

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[1992 Proceedings] Second International Workshop on Research Issues on Data Engineering: Transaction and Query Processing

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