| SESSION_KEY | NUMBER | Session identifier. Use in joins with RC_RMAN_OUTPUT. | 
| SESSION_RECID | NUMBER | Together with SESSION_STAMP, uniquely identifies output for this backup job from RC_RMAN_OUTPUT. | 
| SESSION_STAMP | NUMBER | Together with SESSION_RECID, uniquely identifies output for this backup job from RC_RMAN_OUTPUT. | 
| 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. | 
| DB_NAME | VARCHAR2(8) | The DB_NAMEof the database incarnation to which this record belongs. | 
| BS_KEY | NUMBER | Unique backup set identifier. | 
| SET_STAMP | NUMBER | Set stamp. | 
| SET_COUNT | NUMBER | Set count. | 
| MODIFICATION_TIME | DATE | Modification time. | 
| FILESIZE | NUMBER | Size in bytes of the SPFILE that was backed up. | 
| FILESIZE_DISPLAY | VARCHAR2(4000) | Same value as FILESIZE, but converted to a user-displayable format, for example nM, nG, nT, nP.. |