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:
Mar. 22, 2016
Filed:
Aug. 20, 2013
Pivotal Software, Inc., Palo Alto, CA (US);
Michael Brand, Bentleigh East, AU;
Pivotal Software, Inc., Palo Alto, CA (US);
Abstract
A method of indexing a database column is disclosed. A permutation function f is determined. A shortcut that connects two non-adjacent elements of a permutation cycle based on f is created. A traversal of the permutation cycle without the shortcut comprises starting at a first element of the permutation cycle by updating a candidate row number to an initial value, wherein the initial value comprises a value stored in the database column. Traversing through one element of the permutation cycle comprises reading a row value in the database column using the candidate row number and then updating the candidate row number with function f of the most recently read row value. The step of traversing through one element of the permutation cycle is repeated until the most recently read row value is equal to the initial value. Creating the shortcut comprises storing a relation between the two non-adjacent elements.