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:
May. 05, 2009
Filed:
Feb. 12, 2003
Applicants:
Charles Mike Potter, Osgoode, CA;
Glen Michael Seeds, Ottawa, CA;
Henk Cazemier, Ottawa, CA;
Inventors:
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/00 (2006.01); G06F 17/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
In cases where two or more database tables can be joined by more than one relationship or criterion on the row values of selected columns, to produce what is effectively a wider table, there may result an ambiguity of which join should be used. The invention provides a means of join disambiguation that is rule-driven. The user is relieved of understanding the details of how the disambiguation is being done. The system described in this invention makes the choice of which join to use based on clear transformation rules which relate to folders of the tables and their relationships.