rman连接catalog备份时使用的基表解释

rman连接catalog备份时使用的基表和view，解释如下：

Base tables:
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NAME       DESCRIPTION
-------   --------------------
AL         contains archived logs. archived logs are uniquely identified by dbinc_key, recid and stamp.
BCB        contains corrupt block ranges in datafile backups.
BCF        contains control file backups (in backup sets).
BDF        contains all datafile backups (in backup sets).
BP         contains all backup pieces of backup sets.
BRL        contains backup redo logs (in backup sets).
BS         contains all backup sets for all database incarnations.
CCB        contains corrupt block ranges in datafile copies.
CCF        contains control file copies.
CDF        contains all datafile copies.
CKP        records all recovery catalog checkpoints.
DB         contains all target databases that have been registered in this recovery catalog.
DBINC      contains all incarnations of the target databases registered in this recovery catalog.
DF         contains all datafiles of all database incarnations.
DFATT      datafile attributes that change over time.
OFFR       stores datafile offline ranges.
ORL        contains all redo logfiles for all database incarnations.
RCVER      recovery catalog version.
RLH        records all redo log history for all threads.
RR         contains redo ranges for all database incarnations.
RT         redo threads for all database incarnations.
SCR        contains 1 row for each stored script.
SCRL       contains 1 row for each line of each stored script.
TS         contains all tablespaces of all database incarnations.
TSATT      tablespace attributes that change over time.
 
Views:
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NAME                            DESCRIPTION
------------------           --------------------
RC_ARCHIVED_LOG               information about all archivelogs.
RC_BACKUP_CONTROLFILE         backup control files in backup sets.
RC_BACKUP_CORRUPTION          corrupt blocks in datafile backups and copies.
RC_BACKUP_DATAFILE            datafile backups (in backup sets).
RC_BACKUP_PIECE               backup pieces.
RC_BACKUP_REDOLOG             redo log backups (in backup sets).
RC_BACKUP_SET                 backup sets.
RC_CHECKPOINT                 rc_checkpoint is replaced by rc_resync, but is still used by some tests.
RC_CONTROLFILE_COPY           controlfile copies.
RC_COPY_CORRUPTION            corrupt block ranges in datafile copies for all database incarnations.
RC_DATABASE information       about databases and their current incarnations.
RC_DATABASE_INCARNATION       information about all incarnations registered in recovery catalog.
RC_DATAFILE information       about all datafiles registered in recovery catalog.
RC_DATAFILE_COPY              datafile copies (on disk).
RC_LOG_HISTORY                information about redo log history.
RC_OFFLINE_RANGE              offline ranges for datafiles.
RC_REDO_LOG                   information about online redo logs.
RC_REDO_THREAD                information about redo threads.
RC_RESYNC                     information about recovery catalog resyncs (checkpoints).
RC_STORED_SCRIPT              stored scripts.
RC_STORED_SCRIPT_LINE         each line of each stored script.
RC_TABLESPACE                 information about all tablespaces registered in recovery catalog.