Method and apparatus for preserving non-current information that

Details Method and apparatus for preserving non-current information that Method and apparatus for preserving non-current information that

1997-10-31

1999-08-31

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707 1, 707 2, 707 8, 707100, 707103, 707201, 707202, 707204, G06F 1730

Patent

active

059467002

ABSTRACT:
A method and system periodically copies information from a computer file to a database to preserve non-current information from the file. As information from the file is overwritten by new information, the old information is preserved in the database, allowing non-current information to be used without reprogramming the computer programs or portions of the computer program that read or write the file. If the file is arranged into one or more sections, and new information stored in a section of the file is assigned an identifier higher than the other information in the section, the amount of time required to locate new information in the file can be reduced. Comparing the highest identifier in the section with the highest identifier in the database for that section can identify sections of the file that have received no new information since the last update made to the database.

REFERENCES:
patent: 4853843 (1989-08-01), Ecklund
patent: 4912637 (1990-03-01), Sheedy
patent: 5375237 (1994-12-01), Tanaka
patent: 5499965 (1996-03-01), Anderson
patent: 5530855 (1996-06-01), Satoh
patent: 5696967 (1997-12-01), Hayashi
patent: 5778388 (1998-07-01), Kawamura
patent: 5850507 (1998-12-01), Ngai
patent: 5881292 (1999-03-01), Sigal

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