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:
Apr. 17, 2012
Filed:
Oct. 08, 2010
Frank Renkes, Rauenberg, DE;
Thomas Peh, Heidelberg, DE;
Andrew Ross, Altrip, DE;
Holger Schwedes, Stutensee, DE;
Wolfgang Stephan, Heidelberg, DE;
Frank Renkes, Rauenberg, DE;
Thomas Peh, Heidelberg, DE;
Andrew Ross, Altrip, DE;
Holger Schwedes, Stutensee, DE;
Wolfgang Stephan, Heidelberg, DE;
SAP AG, Walldolf, DE;
Abstract
Methods and apparatus, including computer program products, for selection of rows and values from indexes with updates. In general, rows of an index may be associated with validity flags that indicate whether a row has been updated with an update inserted in a delta index; one scheme for value identifiers may be used for an index and another scheme for one or more delta indexes where all of the indexes are, to at least some extent, compressed according to dictionary-based compression; and multiple delta indexes may be used in alternation such that one delta index may accept updates while another is being updated. The delta indexes may also have validity flags and all updates, such as modifications of values, deletion of records, and inserting of new records may be handled as updates accepted by one or more delta indexes.