Data processing: database and file management or data structures – Database and file access – Database access control methods
Reexamination Certificate
2009-08-07
2011-10-04
Lewis, Cheryl (Department: 2155)
Data processing: database and file management or data structures
Database and file access
Database access control methods
C715S781000
Reexamination Certificate
active
08032554
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.
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Handa Atsuro
Imaki Tsuneyuki
Kawashima Masanori
Nishizawa Itaru
Hitachi , Ltd.
Lewis Cheryl
Mattingly & Malur, PC
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