Processing records from a database

G - Physics – 06 – F

Patent

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G06F 17/40 (2006.01) G06F 12/00 (2006.01) G06F 17/30 (2006.01) G06F 19/00 (2006.01)

Patent

CA 2235060

A computer-based method and system of processing records read respectively from first and second related tables of a database includes determining whether data contained in the records read from the first or second tables is unevenly distributed. Records corresponding to evenly distributed data are searched for matches using a first set of instances of the hash-join operator, and records corresponding to data which is unevenly distributed are searched for matches using a second set of instances of a hash-join operator.

Une méthode et un système informatiques de traitement d'enregistrements lus respectivement dans une première et une seconde tables d'une base de données permettent entre autres de déterminer si les données de ces enregistrements sont réparties non uniformément. Les enregistrements correspondant à des données réparties uniformément font l'objet d'une recherche de correspondances au moyen d'un premier ensemble d'instances de l'opérateur de hachage-jonction, et les enregistrements correspondant à des données réparties de façon non uniforme font l'objet d'une recherche de correspondances au moyen d'un second ensemble d'instances de l'opérateur de hachage-jonction.

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