Method of a data range search with plural pre-set rules

Details Method of a data range search with plural pre-set rules Method of a data range search with plural pre-set rules

2005-11-01

2005-11-01

Rones, Charles (Department: 2164)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

06961725

ABSTRACT:
A search method for a range search with a plurality of pre-set rules constructs a rule mapping table by dividing data associated with the rules into a plurality of sub-keys and generating output tables for each sub-key. A rule column is formed for a rule by following through each sub-key based on the associated range of data. A first output table for the first sub-key and upper and lower output tables are generated for each remaining sub-key. All the rule columns are arranged in parallel to form the rule mapping table. The method of search is accomplished by dividing an input data into a plurality of sub-keys and each sub-key is used to search through the rule mapping table for determining a rule that is satisfied with the input data. If multiple rules are satisfied, a priority encoder selects a highest priority rule as the search result.

REFERENCES:
patent: 6778984 (2004-08-01), Lu et al.

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