Patents by Inventor Jeff Lefevre

Jeff Lefevre 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).

  • Queries based on ranges of hash values
    Patent number: 11106672
    Abstract: A system includes a database client, and a distributed database comprising database nodes. The distributed database may receive a database query from the client, determine that the query comprises a range of hash values of a table partition stored by a node of the distributed database, and determine that the range of hash values is not stored by other nodes of the distributed database. Responsive to determining that the range of hash values of the query is stored by the node and not by the other nodes, the database may generate an optimized distributed execution plan that includes the node that stores the range of hash values and excludes the nodes that do not include the range of hash values.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 31, 2021
    Assignee: MICRO FOCUS LLC
    Inventors: Rui Liu, Qiming Chen, Jeff Lefevre, Malu G. Castellanos, Meichun Hsu
  • QUERIES BASED ON RANGES OF HASH VALUES
    Publication number: 20180268030
    Abstract: A system includes a database client, and a distributed database comprising database nodes. The distributed database may receive a database query from the client, determine that the query comprises a range of hash values of a table partition stored by a node of the distributed database, and determine that the range of hash values is not stored by other nodes of the distributed database. Responsive to determining that the range of hash values of the query is stored by the node and not by the other nodes, the database may generate an optimized distributed execution plan that includes the node that stores the range of hash values and excludes the nodes that do not include the range of hash values.
    Type: Application
    Filed: September 25, 2015
    Publication date: September 20, 2018
    Inventors: Rui Liu, Qiming Chen, Jeff Lefevre, Malu G. Castellanos, Meichun Hsu