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:
Jan. 09, 2007
Filed:
May. 28, 1999
Alan J. Demers, Boulder Creek, CA (US);
Curtis Elsbernd, Belmont, CA (US);
James William Stamos, Saratoga, CA (US);
Lik Wong, Union City, CA (US);
Alan J. Demers, Boulder Creek, CA (US);
Curtis Elsbernd, Belmont, CA (US);
James William Stamos, Saratoga, CA (US);
Lik Wong, Union City, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Schema evolution involves defining flavored object groups. Specifically, related collections of replicated tables and other database objects, which are defined as belonging to an object group, are given different 'flavors.' A flavor describes different subsets of the objects and even different subsets of the columns in the master tables. In one embodiment, when one site in a distributed database system propagates changes to a replicated database object, the current flavor for the site is also transmitted, so that the destination site can make the necessary adjustments in the uploaded changes by dropping the values for obsolete columns and using default values for new columns.