Konferenzbeitrag
A Bayesian approach to estimating the selectivity of conjunctive predicates
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Dokumententyp
Text/Conference Paper
Dateien
Datum
2009
Autor:innen
Zeitschriftentitel
ISSN der Zeitschrift
Bandtitel
Quelle
Datenbanksysteme in Business, Technologie und Web (BTW) – 13. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssysteme" (DBIS)
Regular Research Papers
Verlag
Gesellschaft für Informatik e.V.
Zusammenfassung
Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan costs in order to choose the cheapest plan for executing a query. Since statist