Title:
METHOD AND SYSTEM FOR MULTIVERSION PARALLEL CONTROL OVER OBJECT-ORIENTED DATA BASE
Document Type and Number:
Japanese Patent JP2513160
Kind Code:
B2
Abstract:
PURPOSE: To enables a read-only transaction to read a new version.
CONSTITUTION: A commit list comparison part 1 and an updata object number inspection part 2 shifts a set (VSr) of versions which the read-only transaction accesses to a set (VSu) of versions to be comitted newly by a version set transition part 6 when there are objects having the same versions belonging to the set (VSr) that the read-only transaction accesses and the set (VSu) of versions comitted by an update transaction, a version generated right after the version belonging to the VSr is a version belonging to the VSu as to an object having a different version, and a readout list comparison part 5 finds that the version of the VSr that the read-only transaction should read as to objects having different version belonging to the VSr and VSu is not accessed.
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Inventors:
SAEKI TAKEYUKI
Application Number:
JP14634294A
Publication Date:
July 03, 1996
Filing Date:
June 28, 1994
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
G06F12/00; (IPC1-7): G06F12/00; G06F12/00
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)