LogMiner runs only on databases of release 8.1 or later, but you can use it to analyze redo log files from release 8.0 databases. However, the information that LogMiner is able to retrieve from a redo log file depends on the version of the log, not the release of the database in use. For example, redo log files for Oracle9i can be augmented to capture additional information when supplemental logging is enabled. This allows LogMiner functionality to be used to its fullest advantage. Redo log files created with older releases of Oracle will not have that additional data and may therefore have limitations on the operations and data types supported by LogMiner.