Patents by Inventor Stefan Hildenbrand

Stefan Hildenbrand 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 of performing snapshot isolation in distributed databases
    Patent number: 8935205
    Abstract: A system and method of performing snapshot isolation in distributed databases. Each node stores local snapshot information that enforces snapshot isolation for that node. The method includes partially processing a distributed transaction by a first node, receiving a global commit identifier from a coordinator, and continuing to process the distributed transaction, by the first node and a second node, in accordance with the global commit identifier.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: January 13, 2015
    Assignee: SAP AG
    Inventors: Stefan Hildenbrand, Carsten Binnig, Franz Faerber, Donald Kossmann, Juchang Lee, Norman May
  • System and Method of Performing Snapshot Isolation in Distributed Databases
    Publication number: 20130124475
    Abstract: A system and method of performing snapshot isolation in distributed databases. Each node stores local snapshot information that enforces snapshot isolation for that node. The method includes partially processing a distributed transaction by a first node, receiving a global commit identifier from a coordinator, and continuing to process the distributed transaction, by the first node and a second node, in accordance with the global commit identifier.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 16, 2013
    Applicant: SAP AG
    Inventors: Stefan Hildenbrand, Carsten Binnig, Franz Faerber, Donald Kossmann, Juchang Lee, Norman May
  • Dictionary-based order-preserving string compression for main memory column stores
    Patent number: 7868789
    Abstract: Methods and systems are described that involve usage of dictionaries for compressing a large set of variable-length string values with fixed-length integer keys in column stores. The dictionary supports updates (e.g., inserts of new string values) without changing codes for existing values. Furthermore, a shared-leaves approach is described for indexing such a dictionary that compresses the dictionary itself while offering access paths for encoding and decoding.
    Type: Grant
    Filed: June 28, 2009
    Date of Patent: January 11, 2011
    Assignee: SAP AG
    Inventors: Carsten Binnig, Franz Faerber, Stefan Hildenbrand
  • DICTIONARY-BASED ORDER-PRESERVING STRING COMPRESSION FOR MAIN MEMORY COLUMN STORES
    Publication number: 20100328115
    Abstract: Methods and systems are described that involve usage of dictionaries for compressing a large set of variable-length string values with fixed-length integer keys in column stores. The dictionary supports updates (e.g., inserts of new string values) without changing codes for existing values. Furthermore, a shared-leaves approach is described for indexing such a dictionary that compresses the dictionary itself while offering access paths for encoding and decoding.
    Type: Application
    Filed: June 28, 2009
    Publication date: December 30, 2010
    Inventors: Carsten Binnig, Franz Faerber, Stefan Hildenbrand