| DB_NAME | VARCHAR2(8) | The DB_NAMEof the database incarnation to which this record belongs. | 
| DB_KEY | NUMBER | The primary key for this database in the recovery catalog. Use this column to form a join with almost any other catalog view. | 
| SESSION_KEY | NUMBER | Session identifier. Use in joins with RC_RMAN_OUTPUT. | 
| RSR_KEY | NUMBER | Unique key for the row in RC_RMAN_STATUScorresponding to the job that created this file. | 
| BTYPE | CHAR(9) | The backup type container, which can be BACKUPSET, IMAGECOPY or PROXYCOPY. | 
| BTYPE_KEY | NUMBER | Unique identifier for the backup type. It is BS_KEY/COPY_KEY. | 
| ID1 | NUMBER | For backups taken as backup sets, this column contains SET_STAMP. For proxy copy or image copy backups, this column contains the RECID from the control file. | 
| ID2 | NUMBER | For backups taken as backup sets, ID2 contains SET_COUNT. For image copy and proxy copy backups ID2 contains STAMP. | 
| FILETYPE | VARCHAR2(15) | The type of this backup file. Possible values are 'BACKUPPIECE','COPY' or 'PROXYCOPY'. | 
| FILETYPE_KEY | NUMBER | Backup piece key if the file is a backup piece, other wise COPY_KEY. This key can be used to directly change the status of the file to available. | 
| STATUS | VARCHAR2(1) | Can be either 'U' (for unavailable backups) or 'X' (for expired backups). | 
| FILESIZE | NUMBER | Size in bytes of the unusable backup file. | 
| DEVICE_TYPE | VARCHAR2(255) | Device type storing this unusuable backup file. Possible values are DISK and SBT_TAPE. | 
| FILENAME | VARCHAR2(1024) | File name. | 
| MEDIA | VARCHAR2(80) | A comment that contains further information about the media manager that created this backup. | 
| MEDIA_POOL | NUMBER | The number of the media pool in which the backup is stored. |