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:
Nov. 18, 2014
Filed:
Dec. 23, 2011
Christian Lemke, Heidelberg, DE;
Tobias Mindnich, Walldorf, DE;
Christoph Weyerhaeuser, Heidelberg, DE;
Franz Faerber, Walldorf, DE;
Kai-uwe Sattler, Ilmenau, DE;
Christian Lemke, Heidelberg, DE;
Tobias Mindnich, Walldorf, DE;
Christoph Weyerhaeuser, Heidelberg, DE;
Franz Faerber, Walldorf, DE;
Kai-Uwe Sattler, Ilmenau, DE;
SAP AG, Walldorf, DE;
Abstract
An additional data structure can be initialized for a column of compressed data to include a prefix storing, for each block of values in the column, a total number of bits set in previous blocks in the bit vector. A block number can be determined for a target block of the plurality of blocks, for example by checking whether or not a specified row number is located in the prefix. If the specified row number is located in the prefix, the prefix value of the prefix is returned, the most frequently occurring value is returned if a corresponding bit in the bit vector in the specified row number is not located in the prefix, or a position of the specified row in an index vector for the column is returned.