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:
Mar. 05, 2013
Filed:
Aug. 13, 2008
Fatih Emekci, San Mateo, CA (US);
Sunil P. Chakkappen, Foster City, CA (US);
Uri Shaft, Castro Valley, CA (US);
Fatih Emekci, San Mateo, CA (US);
Sunil P. Chakkappen, Foster City, CA (US);
Uri Shaft, Castro Valley, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A table-level histogram is maintained incrementally without requiring rescanning of the entire table when new data values are added to the table. A table has multiple partitions of data values. A histogram for data values of the partitions is generated. When a new partition of data values is added to the table, a histogram for only the new partition is generated. To generate a histogram for the entire table, the histograms for the previously generated and newly added partitions are used without needing to refer to the underlying data. A similar approach is applicable when modifying data values in a partition.
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