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arXiv 2003.07316cs.DB
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绑定模式下路径视图的等价重写

Equivalent Rewritings on Path Views with Binding Patterns

Julien Romero, Nicoleta Preda, Antoine Amarilli, Fabian Suchanek

摘要:

具有绑定模式的视图是对数据库的参数化查询。使用这样的视图,例如,对Web服务进行建模。为了回答对这些视图的查询,这些视图必须在执行计划中编排在一起。我们将展示如何将查询重写为等效的执行计划,保证在所有数据库上提供与查询相同的结果。我们提供了一个正确和完整的算法来找到这些计划的路径视图和原子查询。最后,我们表明,我们的方法可以用来回答现实世界中的Web服务的查询。

英文摘要:

A view with a binding pattern is a parameterized query on a database. Such views are used, e.g., to model Web services. To answer a query on such views, the views have to be orchestrated together in execution plans. We show how queries can be rewritten into equivalent execution plans, which are guaranteed to deliver the same results as the query on all databases. We provide a correct and complete algorithm to find these plans for path views and atomic queries. Finally, we show that our method can be used to answer queries on real-world Web services.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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