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Cited by 116Advanced Database Systems and QueriesAdvanced Graph Theory ResearchAlgorithms and Data Compression

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Size Bounds for Factorised Representations of Query Results

Olteanu, Dan, Závodný, Jakub·2015·ACM Transactions on Database Systems
DOI 10.1145/2656335
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Abstract

We study two succinct representation systems for relational data based on relational algebra expressions with unions, Cartesian products, and singleton relations: f-representations, which employ algebraic factorisation using distributivity of product over union, and d-representations, which are f-representations where further succinctness is brought by explicit sharing of repeated subexpressions. In particular we study such representations for results of conjunctive queries. We derive tight asymptotic bounds for representation sizes and present algorithms to compute representations within these bounds. We compare the succinctness of f-representations and d-representations for results of equi-join queries, and relate them to fractional edge covers and fractional hypertree decompositions of the query hypergraph. Recent work showed that f-representations can significantly boost the performance of query evaluation in centralised and distributed settings and of machine learning tasks.

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Metadata

Authors
Olteanu, D., & Závodný, J.
Affiliations
University of Oxford (GB)
ORCID
Olteanu, Dan
Venue
ACM Transactions on Database Systems
Publisher
Association for Computing Machinery (ACM)
Published
2015-03-25
Volume
40
Issue
1
Pages
1-44
ISSN
  • 0362-5915 (ISSN-L)
  • 1557-4644
DOI
10.1145/2656335
OpenAlex
W2050100848
Cited by
116
References
1
Citations by year
2026: 3 · 2025: 15 · 2024: 9 · 2023: 15 · 2022: 7 · 2021: 10 · 2020: 9 · 2019: 9 · 2018: 12 · 2017: 9 · 2016: 11 · 2015: 5
FWCI
14.14
Type
journal article
Language
en
Open access
closed
Licence
www.acm.org/publications/policies/copyright_policy#Background (vor)
Locations
ACM Transactions on Database Systems (publishedVersion)
Funders
EPSRC DTA (EP/P505216/1)
Topics
  • Physical Sciences › Computer Science › Information Systems › Advanced Database Systems and Queries
  • Physical Sciences › Computer Science › Computational Theory and Mathematics › Advanced Graph Theory Research
  • Physical Sciences › Mathematics › Theoretical Computer Science › Algorithms and Data Compression
Keywords
succinct representation, conjunctive queries, query processing, relational algebra

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Olteanu, D., & Závodný, J. (2015). Size Bounds for Factorised Representations of Query Results. ACM Transactions on Database Systems. https://doi.org/10.1145/2656335