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:
Oct. 16, 2012
Filed:
May. 27, 2004
Arthur Vargas Lopes, San Diego, CA (US);
Pradeep Sathyanarayan, San Diego, CA (US);
Arthur Vargas Lopes, San Diego, CA (US);
Pradeep Sathyanarayan, San Diego, CA (US);
Teradata US, Inc., Dayton, OH (US);
Abstract
A method, computer program, and database system are disclosed for optimizing a query of a table based on one or more values in one or more columns of the table. The method includes repeating the following steps for a series of rows in the table and optimizing an execution plan for the query based at least in part on a calculated number of rows per unique value. One or more values for the one or more columns are read. The read values are determined to be different from all previously read values in some cases. When the read values are different, the one or more values are recorded in a data structure corresponding to the result of applying a hash function to the one or more values.