Patents by Inventor Li-Mey P. Lee

Li-Mey P. Lee 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).

  • Boolean term conversion for null-tolerant disjunctive predicates
    Patent number: 9524305
    Abstract: System, method, and computer program product to modify a received query, the received query including a first predicate specifying a comparison operator and a second predicate specifying an IS NULL operator, by replacing the comparison operator of the first predicate with an extended comparison operator, and removing the IS NULL operator from the received query, the extended comparison operator configured to support searching of NULL values in a database management system (DBMS), wherein the extended comparison operator is configured to return rows having column data matching a value predefined to represent NULL values.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: December 20, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Thomas A. Beavin, Mengchu Cai, Dengfeng Gao, Jae H. Lee, Li-Mey P. Lee, Terence P. Purcell, Shengxi Suo
  • Boolean term conversion for null-tolerant disjunctive predicates
    Patent number: 9519662
    Abstract: System, method, and computer program product to modify a received query, the received query including a first predicate specifying a comparison operator and a second predicate specifying an IS NULL operator, by replacing the comparison operator of the first predicate with an extended comparison operator, and removing the IS NULL operator from the received query, the extended comparison operator configured to support searching of NULL values in a database management system (DBMS), wherein the extended comparison operator is configured to return rows having column data matching a value predefined to represent NULL values.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: December 13, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Thomas A. Beavin, Mengchu Cai, Dengfeng Gao, Jae H. Lee, Li-Mey P. Lee, Terence P. Purcell, Shengxi Suo