Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/4137
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dc.contributor.authorLEINDERS, Dirk-
dc.contributor.authorVAN DEN BUSSCHE, Jan-
dc.date.accessioned2007-12-11T08:40:40Z-
dc.date.available2007-12-11T08:40:40Z-
dc.date.issued2007-
dc.identifier.citationJOURNAL OF COMPUTER AND SYSTEM SCIENCES, 73(4). p. 538-549-
dc.identifier.issn0022-0000-
dc.identifier.urihttp://hdl.handle.net/1942/4137-
dc.description.abstractWe show that any expression of the relational division operator in the relational algebra with union, difference, projection, selection, constant-tagging, and joins, must produce intermediate results of quadratic size. To prove this result, we show a dichotomy theorem about intermediate sizes of relational algebra expressions (they are either all linear, or at least one is quadratic), and we link linear relational algebra expressions to expressions using only semijoins instead of joins. (c) 2006 Elsevier Inc. All rights reserved.-
dc.language.isoen-
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCE-
dc.subject.otherdatabase; relational algebra; Semijoin algebra; complexity-
dc.titleOn the complexity of division and set joins in the relational algebra-
dc.typeJournal Contribution-
dc.identifier.epage549-
dc.identifier.issue4-
dc.identifier.spage538-
dc.identifier.volume73-
local.format.pages12-
local.bibliographicCitation.jcatA1-
dc.description.notesHasselt Univ, B-3590 Diepenbeek, Belgium. Transnatl Univ Limburg, B-3590 Diepenbeek, Belgium.LEINDERS, D, Hasselt Univ, B-3590 Diepenbeek, Belgium.dirk.leinders@uhasselt.be-
local.type.refereedRefereed-
local.type.specifiedArticle-
dc.bibliographicCitation.oldjcatA1-
dc.identifier.doi10.1016/j.jcss.2006.10.011-
dc.identifier.isi000246813700002-
item.fulltextNo Fulltext-
item.contributorLEINDERS, Dirk-
item.contributorVAN DEN BUSSCHE, Jan-
item.fullcitationLEINDERS, Dirk & VAN DEN BUSSCHE, Jan (2007) On the complexity of division and set joins in the relational algebra. In: JOURNAL OF COMPUTER AND SYSTEM SCIENCES, 73(4). p. 538-549.-
item.accessRightsClosed Access-
item.validationecoom 2008-
crisitem.journal.issn0022-0000-
crisitem.journal.eissn1090-2724-
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