Cost-based optimization of aggregation star queries on hierarchically clustered data warehouses

Tsois, A; Karayannidis, N; Sellis, T; Theodoratos, D

dc.contributor.author	Tsois, A	en
dc.contributor.author	Karayannidis, N	en
dc.contributor.author	Sellis, T	en
dc.contributor.author	Theodoratos, D	en
dc.date.accessioned	2014-03-01T02:49:08Z
dc.date.available	2014-03-01T02:49:08Z
dc.date.issued	2002	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34340
dc.relation.uri	http://SunSITE.Informatik.RWTH-Aachen.de/Publications/CEUR-WS/Vol-58/tsois.pdf	en
dc.relation.uri	http://www.informatik.uni-trier.de/~ley/db/conf/dmdw/dmdw2002.html#TsoisKST02	en
dc.relation.uri	http://www.dblab.ece.ntua.gr/~atsois/tsois_dmdw02_CR.pdf	en
dc.relation.uri	http://ftp1.de.freebsd.org/Publications/CEUR-WS/Vol-58/tsois.pdf	en
dc.relation.uri	http://www.dblab.ntua.gr/~atsois/tsois_dmdw02_CR.pdf	en
dc.relation.uri	http://ftp.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-58/tsois.pdf	en
dc.subject	Data Warehouse	en
dc.subject	Hierarchical Clustering	en
dc.subject	Optimization Technique	en
dc.subject	Query Processing	en
dc.title	Cost-based optimization of aggregation star queries on hierarchically clustered data warehouses	en
heal.type	conferenceItem	en
heal.publicationDate	2002	en
heal.abstract	A methodology recently proposed to improve processing of star queries on data warehouses is the clustering and indexing of fact tables using their multidimensional hierarchies (DRSN98, MRB99, KS01). Due to this improved organization schema, processing of aggregation star queries changes dramatically creating new optimization opportunities. An important optimization technique is the so-called pre-grouping transformation. Although this transformation is expected to	en
heal.journalName	Design and Management of Data Warehouses	en