Improved method and apparatus for data access in...

G - Physics – 06 – F

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G06F 17/30 (2006.01) G06F 12/00 (2006.01) G06F 15/00 (2006.01) G06F 15/16 (2006.01)

Patent

CA 2180252

An improved system for database quert processing by means of query decomposition which intercepts database queries prior to procesing by a database management system (DBMS) (FIG 3A). The system decomposes at least selected queries to generate multiple subqueries by application in parallel to the DBMS in lieu of the intercepted query (FIG 3B). Responses by the DBMS to the subqueries are assembled (74B) by the system to generate a final response. The system also provides improved methods and apparatus for storage and retrieval of records from a database using the DBMS's cluster storage and index retrieval facilities in combination with a smaller than usual hash bucket size (76B,76C).

Système amélioré d'interrogation d'une banque de données par "décomposition des questions" consistant à intercepter les questions avant leur traitement par le système de gestion de la banque de données ("DBMS"). Le système décompose au moins certaines questions sélectionnées en plusieurs sous-questions qui sont traitées en parallèle par le DBMS à la place de la question interceptée. Les réponses du DBMS aux sous-questions sont assemblées par le DBMS en vue de la réponse finale. Le système comporte également un procédé et un appareil améliorés de stockage et de recherche d'enregistrements d'une banque de données amélioré recourant à des moyens de stockage en grappes combinés à des tailles de compartiments de hachage inférieures à la normale.

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