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:
Nov. 20, 2012
Filed:
Feb. 28, 2011
Database management apparatus and recording medium with database management program recorded thereon
Masaki Nishigaki, Kawasaki, JP;
Masaki Nishigaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A database management apparatus is provided with a setting unit that receives a snapshot request and records information indicating an extraction range to a memory, an extraction unit that sequentially extracts records and records the extracted records to another area, a monitoring unit that records information indicating an extraction-completed area and an extraction-remaining area, an update unit that judges whether a record targeted by an update instruction for update by a subsequent transaction is in the extraction-completed area, updates the update target record in the extraction-completed area if in the extraction-completed area, and records a map of the update target record in the extraction-remaining area to an area outside the extraction range and updates the map if in the extraction-remaining area, and a restore unit that updates the update target record to be the same as the map, after extraction of the update target record is completed.