Database index key update method and program
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United States of America Patent
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Jan 24, 2012
Grant Date -
Oct 14, 2010
app pub date -
Jun 18, 2010
filing date -
Dec 28, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of database update processing for updating efficiently database index keys, when new database index keys are supplied to replace index keys already in the database, generates a delta data between the new and old data comprising insert and delete keys by delete processing from a coupled node tree holding the index keys in the old data using index keys of new data as delete keys, and generates new data by delete and insert processing from and into a coupled node tree holding index keys in old data as index keys using the delete keys and insert keys of the delta data.
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