Abstract
The skyline operator was first proposed in 2001 for retrieving interesting tuples from a dataset. Since then, 100+ skyline-related papers have been published; however, we discovered that one of the most intuitive and practical type of skyline queries, namely, group-by skyline queries remains unaddressed. Group-by skyline queries find the skyline for each group of tuples. In this paper, we present a comprehensive study on processing group-by skyline queries in the context of relational engines. Specifically, we examine the composition of a query plan for a group-by skyline query and develop the missing cost model for the BBS algorithm. Experimental results show that our techniques are able to devise the best query plans for a variety of group-by skyline queries. Our focus is on algorithms that can be directly implemented in today's commercial database systems without the addition of new access methods (which would require addressing the associated challenges of maintenance with updates, concurrency control, etc.).
Original language | English |
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Title of host publication | ACM 18th International Conference on Information and Knowledge Management, CIKM 2009 |
Pages | 1433-1436 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 1 Dec 2009 |
Event | ACM 18th International Conference on Information and Knowledge Management, CIKM 2009 - Hong Kong, Hong Kong Duration: 2 Nov 2009 → 6 Nov 2009 |
Conference
Conference | ACM 18th International Conference on Information and Knowledge Management, CIKM 2009 |
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Country/Territory | Hong Kong |
City | Hong Kong |
Period | 2/11/09 → 6/11/09 |
Keywords
- Group-by
- Skyline
ASJC Scopus subject areas
- General Decision Sciences
- General Business,Management and Accounting