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Background documentation Undo Log File Locate the document in the library structure

The database system writes undo log entries (before images) for transactions that are to change data in the database system. These undo log entries are written to undo log files in the data area. Each undo log entry in an undo log file has an undo log sequence number that starts with 0.

See also:

Concepts of the Database System, Undo Log Management

 

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