An information retrieval system using index anding for improving perfor mance
CA 2427273 A1 · Owner: Finlay, Ian R. · Inventors: Lohman, Guy M.; Finlay, Ian R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For an information retrieval system adapted to process a query having an associated plan, the associated plan includes applying predicates including local predicates , and a join predicate, to at least two tables, method and system of applying the predicates is provided. Index ANDing is used to construct a filter for filtering a first of the tables in accordance, with the local predicates. The join predicate is applied to the tables for determining row, identifiers of rows satisfying the join predicate. The row identifiers are used to probe the, filter for determining whether the rows satisfying the join predicate also satisfy the local, predicates. The rows that satisfy both the join …
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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 April 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2025.
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Timeline
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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.