Method of facilitating database access

G - Physics – 06 – F

Patent

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G06F 17/30 (2006.01)

Patent

CA 2451076

A method of optimizing ranking queries in analytic applications. The method involves dividing a ranking query constructed by a user into multiplesub- commands. These sub-commands are based on the relationship between the foreign key and raking attributes of a table of data and are run as a batch of commands. As usable data is extracted from each sub-command, it is stored and the foreign key is used as a filter for the next query in the batch. This eliminates accessing irrelevant data and facilitates the query operation. The extracted data is joined as the last step of the process in order to minimize the number of join operations performed by the query while the batch is being executed, thereby facilitating the query process.

L'invention concerne un procédé d'optimisation d'interrogations hiérarchisées dans des applications analytiques. Le procédé consiste à diviser en plusieurs sous-instructions une interrogation hiérarchisée construite par un usager. Ces sous-instructions sont fondées sur la relation entre la clé étrangère et des attributs de hiérarchisation d'une table de données, et sont exécutées en tant que lot d'instructions. A mesure que des données utilisables sont extraites de chaque sous-instruction, elles sont stockées et la clé étrangère est utilisée comme un filtre pour l'interrogation suivante dans le lot. Cette procédure élimine la possibilité d'accéder à des données non pertinentes et facilite l'opération d'interrogation. A l'ultime étape du procédé, les données extraites sont regroupées afin de limiter au minimum le nombre d'opérations de regroupement effectué par l'interrogation alors que le lot est en cours d'exécution, ce qui facilite le processus d'interrogation.

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