Apparatus and method for data management

Details Apparatus and method for data management Apparatus and method for data management

2011-03-22

2011-03-22

Lee, Wilson (Department: 2163)

Data processing: database and file management or data structures

Data integrity

Concurrent read/write management using locks

C707S703000

Reexamination Certificate

active

07912821

ABSTRACT:
A data management method includes a reference activation step, after generating a first time-series data for causing chronological relationship to be identifiable in a memory device at activation of a reference operation to a first record in a database, of referring to the first record; an update step, in response to an update request for the first record, of generating a second record corresponding to the first record in the database and updating the second record; a commit step of generating a second time-series data in the memory device at a commit operation for the updating; a reference termination step of deleting the first time-series data at completion of the reference operation; and a deletion step, if the first time-series data generated earlier than the second time-series data is not present as a result of the commit step or the reference termination step, of deleting the first record.

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An online document: “PostgreSQL: Documentation: Manuals: PostgreSQI, 7.1: Multi-version Concurrency,” searched on Apr. 25, 2008: http://www.postgresql.org/docs/7.1/static/mvcc.html.

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