NDLI: Generating Plans from Proofs

Content Provider	ACM Digital Library
Author	Ten cate, Balder Benedikt, Michael Tsamoura, Efthymia
Copyright Year	2016
Abstract	We present algorithms for answering queries making use of information about source integrity constraints, access restrictions, and access costs. Our method can exploit the integrity constraints to find plans even when there is no direct access to relations appearing in the query. We look at different kinds of plans, depending on the kind of relational operators that are permitted within their commands. To each type of plan, we associate a semantic property that is necessary for having a plan of that type. The key idea of our method is to move from a search for a plan to a search for a proof of the corresponding semantic property, and then generate a plan from a proof. We provide algorithms for converting proofs to plans and show that they will find a plan of the desired type whenever such a plan exists. We show that while discovery of one proof allows us to find a single plan that answers the query, we can explore alternative proofs to find lower-cost plans.
Starting Page	1
Ending Page	45
Page Count	45
File Format	PDF
ISSN	03625915
e-ISSN	15574644
DOI	10.1145/2847523
Volume Number	40
Issue Number	4
Journal	ACM Transactions on Database Systems (TODS)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-02-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Access methods Hidden web Optimization
Content Type	Text
Resource Type	Article
Subject	Information Systems

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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