优化异构和分布式多数据库系统中的全局查询处理计划

Proceedings. Tenth International Workshop on Database and Expert Systems Applications. DEXA 99 Pub Date : 1999-09-01 DOI:10.1109/DEXA.1999.795117

J. Getta, Seyed M. Sedighi

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引用次数: 5

摘要

本文研究了异构和分布式多数据库系统中查询处理的优化问题。目标是找到一种优化全局查询处理计划的方法。异构和分布式系统中查询处理的两种通用策略包括完全顺序和完全并行方法。本文描述了一种混合策略，其中一些子查询是顺序提交和处理的，而其他子查询是并行处理的。提出并描述了查询后处理的优化，以减少本地系统处理成本估计误差的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Optimizing global query processing plans in heterogeneous and distributed multidatabase systems

The article addresses a problem of optimal query processing in heterogeneous and distributed multidatabase systems. The objective is to find a method for optimization of global query processing plans. Two generic strategies of query processing in heterogeneous and distributed systems include entirely sequential and entirely parallel approaches. The paper describes a hybrid strategy where some of the subqueries are submitted and processed sequentially while the others are processed in parallel. Optimization of query postprocessing is proposed and described in order to reduce an impact of errors in estimation of processing costs at the local systems.

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Proceedings. Tenth International Workshop on Database and Expert Systems Applications. DEXA 99

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