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Lizenz
Report (Bericht) zugänglich unter
Subsumption between queries to object-oriented databases
URN: urn:nbn:de:bsz:291-scidok-37075
URL: http://scidok.sulb.uni-saarland.de/volltexte/2011/3707/
Quelle:
(1993) Kaiserslautern ; Saarbrücken : DFKI, 1993
pdf-Format:
Dokument 1.pdf (417 KB)
SWD-Schlagwörter:
Künstliche Intelligenz
Institut:
DDC-Sachgruppe:
Informatik
Dokumentart:
Report (Bericht)
Schriftenreihe:
Research report / Deutsches Forschungszentrum für Künstliche Intelligenz [ISSN 0946-008x]
Bandnummer:
93-44
Sprache:
Englisch
Erstellungsjahr:
1993
Publikationsdatum:
28.06.2011
Kurzfassung auf Englisch:
Most work on query optimization in relational and object-oriented databases has concentrated on tuning algebraic expressions and the physical access to the database contents. The attention to semantic query optimization, however, has been restricted due to its inherent complexity. We take a second look at semantic query optimization in object-oriented databases and find that reasoning techniques for concept languages developed in Artificial Intelligence apply to this problem because concept languages have been tailored for efficiency and their semantics is compatible with class and query definitions in object-oriented databases. We propose a query optimizer that recognizes subset relationships between a query and a view (a simpler query whose answer is stored) in polynomial time.
Lizenz:
Standard-Veröffentlichungsvertrag