Patents by Inventor Marcel Birn

Marcel Birn 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).

  • Write access control in a database
    Patent number: 10275401
    Abstract: A computer implemented method for initializing a first image of a first database from a recovery image; modifying the first image of the first database by replaying transaction logs of a second database; establishing a connection with a client; receiving a query via the connection, the query including a transaction to be executed on the first database; and rejecting the query when the transaction would cause any one of: updating of the first image of the first database; generating a new transaction log; and modifying the recovery image. Related apparatus, systems, techniques and articles are also described.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: April 30, 2019
    Assignee: SAP SE
    Inventors: Chul Won Lee, Kyu Hwan Kim, Marcel Birn, Jane Jung Lee, Di Wu, Juchang Lee, Zhi Qiao
  • Version space reconstruction during database initialization
    Patent number: 10162710
    Abstract: A computer implemented method is provided. The method comprises initializing a first database image of a first database system based on a recovery image comprising committed transactions, visible uncommitted transactions, and undo logs associated with the visible uncommitted transactions, undoing the visible uncommitted transactions using the undo logs, generating redo logs from the undo logs, replaying the redo logs to create invisible uncommitted transactions, and after replaying the redo logs, replaying transaction logs received from a second database system. Related apparatus, systems, techniques and articles are also described.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: December 25, 2018
    Assignee: SAP SE
    Inventors: Yong Sik Kwon, Hyeong Seog Kim, Kyu Hwan Kim, Seyeong Bae, Joo Yeon Lee, Beomsoo Kim, Juchang Lee, Marcel Birn
  • Version Space Reconstruction During Database Initialization
    Publication number: 20180150360
    Abstract: A computer implemented method is provided. The method comprises initializing a first database image of a first database system based on a recovery image comprising committed transactions, visible uncommitted transactions, and undo logs associated with the visible uncommitted transactions, undoing the visible uncommitted transactions using the undo logs, generating redo logs from the undo logs, replaying the redo logs to create invisible uncommitted transactions, and after replaying the redo logs, replaying transaction logs received from a second database system. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: November 28, 2016
    Publication date: May 31, 2018
    Inventors: Yong Sik Kwon, Hyeong Seog Kim, Kyu Hwan Kim, Seyeong Bae, Joo Yeon Lee, Beomsoo Kim, Juchang Lee, Marcel Birn
  • Write Access Control in a Database
    Publication number: 20180150504
    Abstract: A computer implemented method for initializing a first image of a first database from a recovery image; modifying the first image of the first database by replaying transaction logs of a second database; establishing a connection with a client; receiving a query via the connection, the query including a transaction to be executed on the first database; and rejecting the query when the transaction would cause any one of: updating of the first image of the first database; generating a new transaction log; and modifying the recovery image. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 31, 2018
    Inventors: Chul Won Lee, Kyu Hwan Kim, Marcel Birn, Jane Jung Lee, Di Wu, Juchang Lee, Zhi Qiao