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, 2022
Filed:
Apr. 30, 2019
Applicant:
Sap SE, Walldorf, DE;
Inventors:
Dheren Gala, Pune, IN;
Aditya Gurajada, San Ramon, CA (US);
Assignee:
SAP SE, Walldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 16/22 (2019.01); G06F 16/901 (2019.01); G06F 16/23 (2019.01); G06F 16/2455 (2019.01); G06F 11/14 (2006.01);
U.S. Cl.
CPC ...
G06F 16/901 (2019.01); G06F 11/1471 (2013.01); G06F 16/2237 (2019.01); G06F 16/2255 (2019.01); G06F 16/2358 (2019.01); G06F 16/24552 (2019.01); G06F 2201/80 (2013.01);
Abstract
Example methods and systems are directed to existence checks on rows within a database. A page data structure stores bitmap data for the rows in the page. A row within the page corresponds to a single bit in the bitmap data. To determine if a row has been deleted, the page data structure for the page containing the row is located and the bit for the row in the page data structure is checked. An array of page data structures is created, indexed by a hash of the page identifier. In the event of a hash collision, a linked list of page data structures is used, sorted by page identifier.