| 摘要 |
<p>A method of database update processing for updating efficiently database index keys, when new database index keys (322) are supplied to replace index keys (321, 421a) already in the database, generates a delta data (320, 420a) between the new and old data comprising insert and delete keys by delete processing from a coupled node tree (309-1) holding the index keys in the old data using index keys of new data as delete keys, and generates new data (422a) 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 (420a).</p> |
