Patents by Inventor Ruifeng GUAN

Ruifeng GUAN 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).

  • Method and system for data definition language (DDL) replication
    Patent number: 9582558
    Abstract: Systems, methods and computer program products for DDL replication are described herein. An embodiment includes a replication agent to instantiate one or more DDL triggers in a primary database and a replication server to provide DDL command text to a replicate database based on said DDL triggers. The replication agent uses the DDL trigger(s) to capture one or more DDL events and retrieve a transaction log associated with the DDL events. The replication agent processes the transaction log to obtain DDL command text. The DDL command text is then sent to a replicate database by the replication server where it is executed in an appropriate user context. In this way, DDL commands in may be replicated using DDL trigger(s) and session context switching.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: February 28, 2017
    Assignee: SYBASE, INC.
    Inventors: Ruifeng Guan, Qi Yang
  • Method and System for Data Definition Language (DDL) Replication
    Publication number: 20090300075
    Abstract: Systems, methods and computer program products for DDL replication are described herein. An embodiment includes a replication agent to instantiate one or more DDL triggers in a primary database and a replication server to provide DDL command text to a replicate database based on said DDL triggers. The replication agent uses the DDL trigger(s) to capture one or more DDL events and retrieve a transaction log associated with the DDL events. The replication agent processes the transaction log to obtain DDL command text. The DDL command text is then sent to a replicate database by the replication server where it is executed in an appropriate user context. In this way, DDL commands in may be replicated using DDL trigger(s) and session context switching.
    Type: Application
    Filed: June 2, 2008
    Publication date: December 3, 2009
    Inventors: Ruifeng GUAN, Qi Yang