Cluster Algebra: A Query Language for Heterogeneous Databases

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dc.contributor.authorBhasker, Bharaten
dc.contributor.authorEgyhazy, Csaba J.en
dc.contributor.authorTriantis, Konstantinos P.en
dc.contributor.departmentComputer Scienceen
dc.date.accessioned2013-06-19T14:36:01Zen
dc.date.available2013-06-19T14:36:01Zen
dc.date.issued1992en
dc.description.abstractThis report describes a query language based on algebra for heterogeneous databases. The database logic is used as a uniform framework for studying the heterogeneous databases. The data model based on the database logic is referred to as cluster data model in this report. Generalized Structured Query Language (GSQL) is used for expressing ad-hoc queries over the relational, hierarchical and network database uniformly. For the purpose of query optimization, a query language that can express the primitive heterogeneous database operations is required. This report describes such a query language for the clusters (i.e., heterogeneous databases). The cluster algebra consists of (a) generalized relational operations such as selection, union, intersection, difference, semi-join, rename and cross-product; (b) modified relational operations such as normal projection and normal join; and (c) new operations such as normalize, embed, and unembed.en
dc.format.mimetypeapplication/pdfen
dc.identifierhttp://eprints.cs.vt.edu/archive/00000337/en
dc.identifier.sourceurlhttp://eprints.cs.vt.edu/archive/00000337/01/TR-92-57.pdfen
dc.identifier.trnumberTR-92-57en
dc.identifier.urihttp://hdl.handle.net/10919/19824en
dc.language.isoenen
dc.publisherDepartment of Computer Science, Virginia Polytechnic Institute & State Universityen
dc.relation.ispartofHistorical Collection(Till Dec 2001)en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleCluster Algebra: A Query Language for Heterogeneous Databasesen
dc.typeTechnical reporten
dc.type.dcmitypeTexten

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