Views and Updates over Distributed Databases

2014 16th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing Pub Date : 2014-09-01 DOI:10.1109/SYNASC.2014.53

E. Ravve

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引用次数: 3

Abstract

This contribution deals with systematic exploitation of logical reduction techniques to databases. The particular applications are views and updates over distributed databases. Logical reduction techniques come in two favors. The first one: the syntactically defined translation schemes, which describe transformations of database schemes. They give rise to two induced maps, translations and transductions. Transductions describe the induced transformation of database instances and the translations describe the induced transformations of queries. The second one: Feferman-Vaught reductions, which are applied in situations, where a relational structure is pieced together from a set of sub-structures. The reduction describes how the queries over the structure can be computed from queries over the components and queries over the index set. Combination and development of these techniques allow us to generalize the propagation technique for relational algebra and the incremental re-computation technique for some kinds of Data log programs to cases of definable sets of tuples to be deleted or inserted.

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分布式数据库的视图和更新

该贡献涉及对数据库的逻辑约简技术的系统利用。特定的应用程序是分布式数据库上的视图和更新。逻辑简化技术有两个好处。第一类:语法定义的转换模式，描述数据库模式的转换。它们产生了两种诱导映射，翻译和转导。转换描述数据库实例的诱导转换，转换描述查询的诱导转换。第二种:费曼-沃特约简，应用于关系结构由一组子结构拼凑而成的情况。约简描述了如何通过对组件的查询和对索引集的查询来计算对结构的查询。这些技术的结合和发展使我们能够将关系代数的传播技术和某些类型的数据日志程序的增量重计算技术推广到可定义的元组集的删除或插入情况。

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2014 16th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing

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