Patents by Inventor Paul Laurence Sinclair

Paul Laurence Sinclair has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Virtual join index for relational databases
    Patent number: 6505188
    Abstract: The retrieval of data from a database in a computerized database management system is optimized through the use of a virtual join index and associated covering non-unique secondary indexes. The virtual join index is created by combining one or more commonly-used columns of one or more tables. The covering non-unique secondary indexes are generating by combining one or more commonly-used columns of the virtual join index. Data is not stored in the virtual join index after the covering non-unique secondary indexes are generated. Thereafter, some queries or portions thereof may be resolved solely by accessing one or more of the covering non-unique secondary indexes.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: January 7, 2003
    Assignee: NCR Corporation
    Inventors: Ahmad Said Ghazal, Paul Laurence Sinclair, Chi Kim Hoang