A system and process for evaluating the performance of a database system
CA 2283052 C · Owner: Ibm Canada Limited-Ibm Canada Limitee · Inventors: Hornibrook, John F.; Zuzarte, Calisto Paul; Lumby, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and process for evaluating the performance of an operational database system, without interfering with the normal operation of the operational database system is described. The, process involves the creation of a test database which contains the system catalogs of the operational, database system as user tables. The test database is used to compile queries using these simulated, system catalogs. The access plan generated by the compilation in the test database can then be used, to evaluate the performance of the queries.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 23, 1999 and granted November 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.