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:
Apr. 07, 2015
Filed:
Jun. 21, 2012
Gavin Sherry, San Mateo, CA (US);
Radhika Reddy, Foster City, CA (US);
Caleb E. Welton, Foster City, CA (US);
Gavin Sherry, San Mateo, CA (US);
Radhika Reddy, Foster City, CA (US);
Caleb E. Welton, Foster City, CA (US);
Pivotal Software, Inc., Palo Alto, CA (US);
Abstract
The invention identifies and caches query plans in a shared-nothing distributed data store that are unlikely to become invalid because they do not reference objects that are likely to be changed or deleted. Plans that are likely to become invalid and are not cached are those plans that reference data that is partitioned across segment/query execution nodes of the data store, plans that are complex, and plans that reference objects that are not 'built-in' (primitive) objects. The effect is that most plans which are generated on a query dispatch (master) node are not cached, whereas most plans generated on an execution (segment) node are cached.