Maintaining and reconstructing the history of database content modified by a series of events
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United States of America Patent
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Oct 25, 2005
Grant Date -
Jul 4, 2002
app pub date -
Jun 11, 2001
filing date -
Jan 4, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and a system for maintaining the history of database content when the database is modified by a sequence of events, where each event may be one of a load or a load retraction, is provided. The inventive system and method can reconstruct the state of a database as it existed at a discrete time between two successive historical events without repeating each event in the historical event sequence. A table containing deleted row information and a table containing historical information are maintained as the target table is updated to more quickly recreate historical states of the target table.
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