Efficient answering of set containment queries for skewed item distributions

Terrovitis, M; Bouros, P; Vassiliadis, P; Sellis, T; Mamoulis, N

dc.contributor.author	Terrovitis, M	en
dc.contributor.author	Bouros, P	en
dc.contributor.author	Vassiliadis, P	en
dc.contributor.author	Sellis, T	en
dc.contributor.author	Mamoulis, N	en
dc.date.accessioned	2014-03-01T02:47:20Z
dc.date.available	2014-03-01T02:47:20Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33089
dc.subject	Containment queries	en
dc.subject	Inverted files	en
dc.subject	Ordered inverted files	en
dc.subject	Set-values	en
dc.subject.other	Containment query	en
dc.subject.other	Indexing scheme	en
dc.subject.other	Inverted files	en
dc.subject.other	Query processing algorithms	en
dc.subject.other	Range query	en
dc.subject.other	Set containment	en
dc.subject.other	Set-valued attributes	en
dc.subject.other	Set-values	en
dc.subject.other	State-of-the-art methods	en
dc.subject.other	Synthetic data	en
dc.subject.other	Database systems	en
dc.subject.other	Technology	en
dc.subject.other	Information retrieval systems	en
dc.title	Efficient answering of set containment queries for skewed item distributions	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1145/1951365.1951394	en
heal.identifier.secondary	http://dx.doi.org/10.1145/1951365.1951394	en
heal.publicationDate	2011	en
heal.abstract	In this paper we address the problem of efficiently evaluating containment (i.e., subset, equality, and superset) queries over set-valued data. We propose a novel indexing scheme, the Ordered Inverted File (OIF) which, differently from the state-of-the-art, indexes set-valued attributes in an ordered fashion. We introduce query processing algorithms that practically treat containment queries as range queries over the ordered postings lists of OIF and exploit this ordering to quickly prune unnecessary page accesses. OIF is simple to implement and our experiments on both real and synthetic data show that it greatly outperforms the current state-of-the-art methods for all three classes of containment queries.	en
heal.journalName	ACM International Conference Proceeding Series	en
dc.identifier.doi	10.1145/1951365.1951394	en
dc.identifier.spage	225	en
dc.identifier.epage	236	en