Patents by Inventor Sivasankaran Chandrasekaran

Sivasankaran Chandrasekaran 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).

  • Index maintenance for operations involving indexed XML data
    Patent number: 7921101
    Abstract: A method and system are provided for maintaining an XML index in response to piece-wise modifications on indexed XML documents. The database server that manages the XML index determines which nodes are involved in the piece-wise modifications, and updates the XML index based on only those nodes. Index entries for nodes not involved in the piece-wise modifications remain unchanged.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: April 5, 2011
    Assignee: Oracle International Corporation
    Inventors: Ravi Murthy, Sivasankaran Chandrasekaran, Ashish Thusoo, Nipun Agarwal, Eric Sedlar
  • INDEX MAINTENANCE FOR OPERATIONS INVOLVING INDEXED XML DATA
    Publication number: 20080275919
    Abstract: A method and system are provided for maintaining an XML index in response to piece-wise modifications on indexed XML documents. The database server that manages the XML index determines which nodes are involved in the piece-wise modifications, and updates the XML index based on only those nodes. Index entries for nodes not involved in the piece-wise modifications remain unchanged.
    Type: Application
    Filed: July 15, 2008
    Publication date: November 6, 2008
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Ravi Murthy, Sivasankaran Chandrasekaran, Ashish Thusoo, Nipun Agarwal, Eric Sedlar
  • Index maintenance for operations involving indexed XML data
    Patent number: 7440954
    Abstract: A method and system are provided for maintaining an XML index in response to piece-wise modifications on indexed XML documents. The database server that manages the XML index determines which nodes are involved in the piece-wise modifications, and updates the XML index based on only those nodes. Index entries for nodes not involved in the piece-wise modifications remain unchanged.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: October 21, 2008
    Assignee: Oracle International Corporation
    Inventors: Ravi Murthy, Sivasankaran Chandrasekaran, Ashish Thusoo, Nipun Agarwal, Eric Sedlar
  • Index for accessing XML data
    Publication number: 20050228792
    Abstract: Techniques are provided for indexing XML documents. According to one embodiment, a PATH table created for storing one row for each indexed node of the XML documents. The PATH table row for a node includes (1) information for locating the XML document that contains the node, (2) information that identifies the path of the node, and (3) information that identifies the position of the node within the hierarchical structure of the XML document that contains the node. If the node is associated with the value, then the PATH table row for the node may also include the value. Use of the PATH table to answer XPath queries is facilitated by secondary indexes.
    Type: Application
    Filed: July 2, 2004
    Publication date: October 13, 2005
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Sivasankaran Chandrasekaran, Ravi Murthy, Ashish Thusoo, Anh-Tuan Tran, Sreedhar Mukkamalla, Eric Sedlar, Nipun Agarwal