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, 2020
Filed:
Mar. 07, 2018
Amazon Technologies, Inc., Seattle, WA (US);
Gopi Krishna Attaluri, Cupertino, CA (US);
Kamal Kant Gupta, Snoqualmie, WA (US);
Yingjie He, Cupertino, CA (US);
Saileshwar Krishnamurthy, Palo Alto, CA (US);
Yongsik Yoon, Sammamish, WA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Filtered generation of hash tables may be implemented as part of performing a hash join. A database query may be received that causes a hash join to be performed in order to join two database tables. A filtered generated from a scan of one of the tables that indicates which data in the table can satisfy a join predicate for the hash join may be applied to generate a hash table from a portion of the other table. The filtered hash table may then be used to evaluate whether portions of the tables can be joined in satisfaction of the join predicate for the hash join.