Patents Examined by Apru Mofiz
  • Parallel query optimization strategies for replicated and partitioned tables
    Patent number: 6625593
    Abstract: A method, apparatus, and article of manufacture for optimizing database queries. The query is analyzed to determine whether at least a portion of the query can be evaluated using a plurality of parallel operations without data redistribution. If so, then the most efficient query execution plan that uses these parallel operations is constructed and executed.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: September 23, 2003
    Assignee: International Business Machines Corporation
    Inventors: Ting Yu Leung, Mir Hamid Pirahesh, David E. Simmen, Tuong Chanh Truong