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Titlebook: Generating Plans from Proofs; Michael Benedikt,Julien Leblay,Efthymia Tsamoura Book 2016 Springer Nature Switzerland AG 2016

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发表于 2025-3-21 17:33:59 | 显示全部楼层 |阅读模式
书目名称Generating Plans from Proofs
编辑Michael Benedikt,Julien Leblay,Efthymia Tsamoura
视频video
丛书名称Synthesis Lectures on Data Management
图书封面Titlebook: Generating Plans from Proofs;  Michael Benedikt,Julien Leblay,Efthymia Tsamoura Book 2016 Springer Nature Switzerland AG 2016
描述Query reformulation refers to a process of translating a source query—a request for information in some high-level logic-based language—into a target plan that abides by certain interface restrictions. Many practical problems in data management can be seen as instances of the reformulation problem. For example, the problem of translating an SQL query written over a set of base tables into another query written over a set of views; the problem of implementing a query via translating to a program calling a set of database APIs; the problem of implementing a query using a collection of web services. In this book we approach query reformulation in a very general setting that encompasses all the problems above, by relating it to a line of research within mathematical logic. For many decades logicians have looked at the problem of converting "implicit definitions" into "explicit definitions," using an approach known as interpolation. We will review the theory of interpolation, and explain its close connection with query reformulation. We will give a detailed look at how the interpolation-based approach is used to generate translations between logic-based queries over different vocabulari
出版日期Book 2016
版次1
doihttps://doi.org/10.1007/978-3-031-01856-5
isbn_softcover978-3-031-00728-6
isbn_ebook978-3-031-01856-5Series ISSN 2153-5418 Series E-ISSN 2153-5426
issn_series 2153-5418
copyrightSpringer Nature Switzerland AG 2016
The information of publication is updating

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发表于 2025-3-21 22:10:37 | 显示全部楼层
Vocabulary-based Target Restrictions,the goal is to translate it into a query over a . vocabulary, and the constraints relate tables in the source vocabulary to the target vocabulary. This relates to a broad range of problems in databases, including view-based query reformulation, data integration, and query optimization. We will show
发表于 2025-3-22 02:26:05 | 显示全部楼层
Access Methods and Integrity Constraints,elations, perhaps restricted to be positive existential or existential. In this chapter we deal with a finer notion of reformulation, where the target has to satisfy ., as was illustrated in Examples 1.3 and 1.4.
发表于 2025-3-22 07:42:59 | 显示全部楼层
Reformulation Algorithms for TGDs,ould:.Up until now the last step was always performed through an appeal to an interpolation algorithm. We have shown that this algorithm can be applied to yield optimal worst-case complexity for many reformulation problems—for example, Proposition 2.20 shows that the algorithm achieves this for refo
发表于 2025-3-22 11:26:35 | 显示全部楼层
Low-cost Plans Via Proof Search,(e.g., access methods), whenever such a reformulation exists. We now look at finding efficient reformulations. We focus on the setting where the interface is given by access methods, the goal is to generate an . -plan equivalent to a CQ ., and where the constraints in our schema consist of TGDs. In
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978-3-031-00728-6Springer Nature Switzerland AG 2016
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Brigitte d’Andréa-Novel,Michel De Laraw each chapter relates to the motivating examples. The remainder of the chapter reviews the basic definitions concerning the database models, constraint languages, and query languages used in the text. In the process we will go over some “fine print” concerning the relationship between the languages
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