The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2011
Filed:
Jun. 28, 2009
Applicants:
Carsten Binnig, Elztal, DE;
Franz Faerber, Walldorf, DE;
Stefan Hildenbrand, Altdorf, CH;
Inventors:
Assignee:
SAP AG, Walldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 7/34 (2006.01);
U.S. Cl.
CPC ...
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.