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. 04, 2011
Filed:
Aug. 07, 2009
Itaru Nishizawa, Koganei, JP;
Tsuneyuki Imaki, Kawasaki, JP;
Masanori Kawashima, Yokohama, JP;
Atsuro Handa, Yokohama, JP;
Itaru Nishizawa, Koganei, JP;
Tsuneyuki Imaki, Kawasaki, JP;
Masanori Kawashima, Yokohama, JP;
Atsuro Handa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Stream data is provided for realizing precise calculation processing to keep a constant memory usage of a query including a time-based window, and to take all of input data into consideration. A stream data processing server sections the time-based window into sub-windows each with a smaller width by a query time resolution change unit, and a query processing engine executes the aggregation processing based on the sub-window when receiving the stream data to generate an aggregation tuple, and calculates the calculation result of the query including the time-based window by aggregation processing on the aggregation tuple.