Fine-grained consistency mechanism for optimistic concurrency control using lock groups
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United States of America Patent
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May 29, 2001
Grant Date -
N/A
app pub date -
Jun 29, 1998
filing date -
Dec 22, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for database concurrency control is provided that allows lock groups to contain columns of different tables and allows an individual column of a table to be in more than one lock group. While using optimistic concurrency control for monitoring multiple transactions modifying the same database, it allows the concurrent access of a single table when the individual columns of the table are accessed by separate users or applications. This, in turn, reduces the delay of waiting for a table to be free for access and decreases the delay of rolling back transactions that are concurrently accessing a table. The reduction of these delays increases the overall data processing efficiency for the system.
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