Recovery Catalog Views, 18 of 28

RC_LOG_HISTORY

This view lists historical information about the online redo logs. RMAN adds a new row during a catalog resynchronization whenever Oracle has switched out of the online redo log. This catalog view corresponds to the V$LOG_HISTORY view.

Column	Datatype	Description
`DB_KEY`	`NUMBER`	The primary key for the target database. Use this column to form a join with almost any other catalog view.
`DBINC_KEY`	`NUMBER`	The primary key for the incarnation of the target database. Use this column to form a join with `RC_DATABASE_INCARNATION`.
`DB_NAME`	`VARCHAR2(8)`	The `DB_NAME` of the database incarnation to which this record belongs.
`RECID`	`NUMBER`	The redo log history `RECID` from `V$LOG_HISTORY`. `RECID` and `STAMP` form a concatenated primary key that uniquely identifies this record in the target database control file.
`STAMP`	`NUMBER`	The redo log history stamp from `V$LOG_HISTORY`. `RECID` and `STAMP` form a concatenated primary key that uniquely identifies this record in the target database control file.
`THREAD#`	`NUMBER`	The thread number of the online redo log.
`SEQUENCE#`	`NUMBER`	The log sequence number of the redo log.
`FIRST_CHANGE#`	`NUMBER`	The SCN generated when switching into the redo log.
`FIRST_TIME`	`DATE`	The time stamp when switching into the redo log.
`NEXT_CHANGE#`	`NUMBER`	The first SCN of the next redo log in the thread.
`CLEARED`	`VARCHAR2(3)`	`YES` if the redo log was cleared with the `ALTER` `DATABASE` `CLEAR` `LOGFILE` statement; otherwise, `NULL`. This statement allows a log to be dropped without archiving it first.