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:
Feb. 23, 2016
Filed:
Dec. 30, 2013
Mihnea Andrei, Issy les Moulineaux, FR;
Anil Goel, Waterloo, CA;
Colin Florendo, Marlborough, MA (US);
Rolando Blanco, Waterloo, CA;
David Dehaan, Waterloo, CA;
Mihnea Andrei, Issy les Moulineaux, FR;
Anil Goel, Waterloo, CA;
Colin Florendo, Marlborough, MA (US);
Rolando Blanco, Waterloo, CA;
David DeHaan, Waterloo, CA;
Sybase, Inc., Dublin, CA (US);
Abstract
A locking mechanism in a delta-store-based database to support long running transactions across multiple RID spaces is described. An example method includes establishing a column-based in-memory database including a main store and a delta store. A delete or an update statement is executed with a transaction on a table having plurality of table versions. The table versions are represented by bitmaps in the delta store and the bitmaps and table fragments corresponding to the table versions implement RID spaces for the table. A lock on a row of the table manipulated by the delete or the update statement is requested to preclude other transaction from deleting or updating an obsolete version of data. Upon a successful validation that the row to be locked is not the obsolete version in the RID spaces of the table, a lock is granted to the transaction.