Patents by Inventor Steven J. Pittman

Steven J. Pittman 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).

  • Methods and apparatus for accesssing non-relational data files using relational queries
    Patent number: 5379419
    Abstract: A relational data access facility allows relation-type queries to access data stored in non-relational data files by converting relational queries into a set of common commands which are sent to data drivers to obtain the data specified by those queries. The facility uses metadata which describes the organization of the data in the non-relational files, and examines the expressions in the relational queries to formulate an access plan for the data. The plan is formulated to reduce cost and promote efficiency.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: January 3, 1995
    Assignee: Digital Equipment Corporation
    Inventors: John S. Heffernan, Peter L. Savage, Steven J. Pittman, Ramu V. Sunkara