Patents by Inventor Ichirob Teshima

Ichirob Teshima 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).

  • Consistency of a database management system
    Patent number: 8108365
    Abstract: A database management system for determining consistency in a hierarchical database sequentially reads pointers of a plurality of segment data, generates an address hash value, which is a hash value of retention addresses of the segment data having been read, generates a pointer hash value, which is a hash value of the pointers included in the segment data having been read, corrects the address hash value, when the contents of the address already read is updated, based a retention address of segment data added or deleted by the update, corrects the pointer hash value based on each pointer changed by the update, and determines that the hierarchical database is consistent if the corrected address hash value coincides with the corrected pointer hash value.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: January 31, 2012
    Assignee: International Business Machines Corporation
    Inventors: Shigeko Mori, Toshikazu Takahashi, Ichirob Teshima
  • DATABASE MANAGEMENT SYSTEM, DATABASE MANAGEMENT METHOD, AND PROGRAM
    Publication number: 20090049079
    Abstract: A database management system for determining consistency in a hierarchical database sequentially reads pointers of a plurality of segment data, generates an address hash value, which is a hash value of retention addresses of the segment data having been read, generates a pointer hash value, which is a hash value of the pointers included in the segment data having been read, corrects the address hash value, when the contents of the address already read is updated, based a retention address of segment data added or deleted by the update, corrects the pointer hash value based on each pointer changed by the update, and determines that the hierarchical database is consistent if the corrected address hash value coincides with the corrected pointer hash value.
    Type: Application
    Filed: October 9, 2008
    Publication date: February 19, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Shigeko Mori, Toshikazu Takahashi, Ichirob Teshima