DeltaSky: Optimal maintenance of skyline deletions without exclusive dominance region generation

Ping Wu, Divyakant Agrawal, Ömer Eǧecioǧlu, Amr El Abbadi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

42 Citations (Scopus)

Abstract

This paper addresses the problem of efficient maintenance of a materialized skyline view in response to skyline removals. While there has been significant progress on skyline query computation, an equally important but largely unanswered issue is on the incremental maintenance for skyline deletions. Previous work suggested the use of the so called exclusive dominance region (EDR) to achieve optimal I/O performance for deletion maintenance. However, the shape of an EDR becomes extremely complex in higher dimensions, and algorithms for its computation have not been developed. We derive a systematic way to decompose a d-dimensional EDR into a collection of hyper-rectangles. We show that the number of such hyper-rectangles is O(md), where m is the current skyline result size. We then propose a novel algorithm Del taSky which determines whether an intermediate R-tree MBR intersects with the EDR without explicitly calculating the EDR itself. This reduces the worse case complexity of the EDR intersection check from O(md) to O(md). Thus DeltaSky helps the branch and bound skyline algorithm achieve I/O optimality for deletion maintenance by finding only the newly appeared skyline points after the deletion. We discuss implementation issues and show that DeltaSky can be efficiently implemented using one extra B-Tree. Moreover, we propose two optimization techniques which further reduce the average cost in practice. Extensive experiments demonstrate that DeltaSky achieves orders of magnitude performance gain over alternative solutions.

Original languageEnglish
Title of host publication23rd International Conference on Data Engineering, ICDE 2007
Pages486-495
Number of pages10
DOIs
Publication statusPublished - 24 Sep 2007
Event23rd International Conference on Data Engineering, ICDE 2007 - Istanbul, Turkey
Duration: 15 Apr 200720 Apr 2007

Publication series

NameProceedings - International Conference on Data Engineering
ISSN (Print)1084-4627

Other

Other23rd International Conference on Data Engineering, ICDE 2007
CountryTurkey
CityIstanbul
Period15/4/0720/4/07

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ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Information Systems

Cite this

Wu, P., Agrawal, D., Eǧecioǧlu, Ö., & El Abbadi, A. (2007). DeltaSky: Optimal maintenance of skyline deletions without exclusive dominance region generation. In 23rd International Conference on Data Engineering, ICDE 2007 (pp. 486-495). [4221697] (Proceedings - International Conference on Data Engineering). https://doi.org/10.1109/ICDE.2007.367894