Patents by Inventor Alexios Boukouvalas

Alexios Boukouvalas 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).

  • System and method for providing user defined aggregates in a database system
    Patent number: 7376656
    Abstract: A database system and method allows a user to write program code in a high-level programming language that implements a class that defines the structure of a user-defined aggregate and methods that can be invoked on instances of the user-defined aggregate. The class is then registered with the database system, which enforces a specific contract for user-defined aggregates against the class. The contract comprises the following requirements. First, the class must specify one of a plurality of different formats for persisting instances of the user-defined aggregate in a database store. Second, the class must comprise certain specified methods that can be invoked on an instance of the class. Once these requirements are satisfied, the database system enables instances of the user-defined aggregate to be created. Preferably, the database system stores metadata about the user-defined aggregate for subsequent use in creating instances of the aggregate.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: May 20, 2008
    Assignee: Microsoft Corporation
    Inventors: Jose A. Blakeley, Hongang Zhang, Balaji Rathakrishnan, Ramachandran Venkatesh, Beysim Sezgin, Alexios Boukouvalas, Cesar A. Galindo-Legaria, Peter A. Carlin
  • Generating a hierarchical plain-text execution plan from a database query
    Patent number: 7167848
    Abstract: A system, method and computer-readable medium containing computer-executable instructions for tuning queries is provided. A query processor converts a query into an execution plan in a hierarchical format that conforms to a standardized schema. In one embodiment of the invention, the hierarchical format employed is XML.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: January 23, 2007
    Assignee: Microsoft Corporation
    Inventors: Alexios Boukouvalas, Lubor J. Kollar, Jinghao Liu, Arunprasad P. Marathe
  • System and method for providing user defined aggregates in a database system
    Publication number: 20050177579
    Abstract: A database system and method allows a user to write program code in a high-level programming language that implements a class that defines the structure of a user-defined aggregate and methods that can be invoked on instances of the user-defined aggregate. The class is then registered with the database system, which enforces a specific contract for user-defined aggregates against the class. The contract comprises the following requirements. First, the class must specify one of a plurality of different formats for persisting instances of the user-defined aggregate in a database store.
    Type: Application
    Filed: February 10, 2004
    Publication date: August 11, 2005
    Inventors: Jose Blakeley, Hongang Zhang, Balaji Rathakrishnan, Ramachandran Venkatesh, Beysim Sezgin, Alexios Boukouvalas, Cesar Galindo-Legaria, Peter Carlin
  • Generating a hierarchical plain-text execution plan from a database query
    Publication number: 20050102613
    Abstract: A system, method and computer-readable medium containing computer-executable instructions for tuning queries is provided. A query processor converts a query into an execution plan in a hierarchical format that conforms to a standardized schema. In one embodiment of the invention, the hierarchical format employed is XML.
    Type: Application
    Filed: November 7, 2003
    Publication date: May 12, 2005
    Inventors: Alexios Boukouvalas, Lubor Kollar, Jinghao Liu, Arunprasad Marathe