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. 25, 2011
Filed:
Mar. 24, 2006
Stephan Eberhard Ewen, Stuttgart, DE;
Holger Kache, San Jose, CA (US);
Volker Gerhard Markl, San Jose, CA (US);
Vijayshankar Raman, San Jose, CA (US);
Stephan Eberhard Ewen, Stuttgart, DE;
Holger Kache, San Jose, CA (US);
Volker Gerhard Markl, San Jose, CA (US);
Vijayshankar Raman, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A way for progressively refining a query execution plan during query execution in a federated data system is provided. Re-optimization constraints are placed in the query execution plan during query compilation. When a re-optimization constraint is violated during query execution, a model of the query execution plan is refined using a partially executed query to form a new query execution plan. The new query execution plan is compiled. The compiled new query execution plan is executed.