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:
Sep. 01, 2020
Filed:
Nov. 29, 2016
Sap SE, Walldorf, DE;
Robert Schulze, Walldorf, DE;
Thomas Peh, Walldorf, DE;
SAP SE, Walldorf, DE;
Abstract
Innovations in performing sort operations for dictionary-compressed values of columns in a column-store database using value identifiers ('IDs') are described. For example, a database system includes a data store and an execution engine. The data store stores values at positions of a column A dictionary maps distinct values to corresponding value IDs. An inverted index stores, for each of the corresponding value IDs, a list of those of the positions that contain the associated distinct value. The execution engine processes a request to sort values at an input set of the positions and identify an output set of the positions for sorted values. In particular, the execution engine iterates through positions stored in the lists of the inverted index. For a given position, the execution engine checks if the given position is one of the input set and, if so, adds the given position to the output set.