【摘要】 针对数据仓库中的OLAP查询,提出查询代价视图选择问题,给出了视图选择代价模型.基于此代价模型,采用贪心算法动态实现实视图选择,弥补了原有的静态算法的不足.更多还原

【Abstract】 For the purpose of efficiently implementing on-line analytical processing queries, the query cost view selection problem is proposed. In order to solve it, the view selection cost model are give and the methods and strategies based on greedy algorithms for selecting materialized views dynamically are given based on this cost model. The dynamic algorithm for this problem remedied the deficiency of the already existing static algorithm.更多还原