BTYPE | 
CHAR(9) | 
The type of this control file backup. Possible values are BACKUPSET, IMAGECOPY or PROXYCOPY. | 
BTYPE_KEY | 
NUMBER | 
Unique identifier for the backup type. If BTYPE is BACKUPSET, then this value is the BS_KEY value for the backup set. If BTYPE is IMAGECOPY, this value is the value of COPY_KEY for the copy. If BTYPE is PROXYCOPY, this is the value of XCF_KEY for the proxy copy. | 
SESSION_KEY | 
NUMBER | 
Session identifier. Use in joins with RC_RMAN_OUTPUT and RC_RMAN_BACKUP_JOB_DETAILS. | 
SESSION_RECID | 
NUMBER | 
The RECID from the control file for the target database which corresponds to this RMAN session. | 
SESSION_STAMP | 
NUMBER | 
The STAMP from the control file for the target database which corresponds to this RMAN session. | 
DB_KEY | 
NUMBER | 
The primary key for this database in the recovery catalog. Use this column to join with almost any other catalog view. | 
DB_NAME | 
VARCHAR2(8) | 
The DB_NAME of the database incarnation to which this record belongs. | 
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, this column contains SET_COUNT. For proxy copy or image copy backups, this column contains the value of STAMP. | 
CREATION_TIME | 
DATE | 
File creation time for the control file that was backed up. | 
RESETLOGS_CHANGE# | 
NUMBER | 
SCN of the RESETLOGS branch where this control file was backed up. | 
RESETLOGS_TIME | 
DATE | 
Time of the RESETLOGS branch where this control file was backed up. | 
CHECKPOINT_CHANGE# | 
NUMBER | 
Most recent checkpoint change SCN for the control file that was backed up. | 
CHECKPOINT_TIME | 
DATE | 
Most recent checkpoint time for the control file that was backed up. | 
FILESIZE | 
NUMBER | 
File size, in bytes, for the output of backing up this control file. | 
COMPRESSION_RATIO | 
NUMBER | 
Compression ratio for this backup. | 
FILESIZE_DISPLAY | 
VARCHAR2(4000) | 
Same value as the FILESIZE column, but converted to a user-displayable format, for example, 798.01M or 5.25G. |