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:
Sep. 22, 2015
Filed:
Aug. 31, 2009
Roger Mitchell, Austin, TX (US);
Renu Varshneya, Cupertino, CA (US);
Awny K. Al-omari, Cedar Park, TX (US);
Roger Mitchell, Austin, TX (US);
Renu Varshneya, Cupertino, CA (US);
Awny K. Al-Omari, Cedar Park, TX (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
There is provided a computer-implemented method of optimizing a query. An exemplary method comprises receiving a first request from an optimizer that specifies a table, a first predicate and a first sample size, wherein the optimizer is optimizing a relational query language statement that specifies the table and the first predicate. The exemplary method also comprises generating a sample table, comprising a first subset of rows from the table, based on the request. The exemplary method also comprises selecting a second subset of rows from the sample table based on the predicate. The exemplary method additionally comprises sending a count of rows in the second subset to the optimizer.