可以试试 DBMS_BACKUP_RESTORE 。

这里假定是nocatalog的情况下，并且采用了RMAN备份，但是丢失了控制文件，因为控制文件中包含了rman的备份信息，所以没有办法用平常的方法来恢复，如果想恢复数据库，则需要利用一个叫 DBMS_BACKUP_RESTOE 的包来实现，这个包在nomount下就可以正常运行，也就是说，只需要启动到nomount下就可以利用它来恢复控制文件或者数据文件以及归档日志。

或者手动重建控制文件，进行恢复。

可参考：

-- The following are current System-scope REDO Log Archival related
-- parameters and can be included in the database initialization file.
--
-- LOG_ARCHIVE_DEST=''
-- LOG_ARCHIVE_DUPLEX_DEST=''
--
-- LOG_ARCHIVE_FORMAT=%t_%s_%r.dbf
--
-- DB_UNIQUE_NAME="orcl"
--
-- LOG_ARCHIVE_CONFIG='SEND, RECEIVE, NODG_CONFIG'
-- LOG_ARCHIVE_MAX_PROCESSES=4
-- STANDBY_FILE_MANAGEMENT=MANUAL
-- STANDBY_ARCHIVE_DEST=?/dbs/arch
-- FAL_CLIENT=''
-- FAL_SERVER=''
--
-- LOG_ARCHIVE_DEST_1='LOCATION=/archivelog'
-- LOG_ARCHIVE_DEST_1='OPTIONAL REOPEN=300 NODELAY'
-- LOG_ARCHIVE_DEST_1='ARCH NOAFFIRM NOEXPEDITE NOVERIFY SYNC'
-- LOG_ARCHIVE_DEST_1='REGISTER NOALTERNATE NODEPENDENCY'
-- LOG_ARCHIVE_DEST_1='NOMAX_FAILURE NOQUOTA_SIZE NOQUOTA_USED NODB_UNIQUE_NAME'
-- LOG_ARCHIVE_DEST_1='VALID_FOR=(PRIMARY_ROLE,ONLINE_LOGFILES)'
-- LOG_ARCHIVE_DEST_STATE_1=ENABLE
 
--
-- Below are two sets of SQL statements, each of which creates a new
-- control file and uses it to open the database. The first set opens
-- the database with the NORESETLOGS option and should be used only if
-- the current versions of all online logs are available. The second
-- set opens the database with the RESETLOGS option and should be used
-- if online logs are unavailable.
-- The appropriate set of statements can be copied from the trace into
-- a script file, edited as necessary, and executed when there is a
-- need to re-create the control file.
--
--     Set #1. NORESETLOGS case
--
-- The following commands will create a new control file and use it
-- to open the database.
-- Data used by Recovery Manager will be lost.
-- Additional logs may be required for media recovery of offline
-- Use this only if the current versions of all online logs are
-- available.
 
-- After mounting the created controlfile, the following SQL
-- statement will place the database in the appropriate
-- protection mode:
--  ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE
 
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS  NOARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 '/oradata/orcl/redo01.log'  SIZE 120M BLOCKSIZE 512,
  GROUP 2 '/oradata/orcl/redo02.log'  SIZE 120M BLOCKSIZE 512,
  GROUP 3 '/oradata/orcl/redo03.log'  SIZE 120M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
  '/oradata/orcl/system01.dbf',
  '/oradata/orcl/sysaux01.dbf',
  '/oradata/orcl/undotbs01.dbf',
  '/oradata/orcl/users01.dbf',
  '/oradata/orcl/example01.dbf'
CHARACTER SET AL32UTF8
;
 
-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE '/archivelog/1_1_1069941729.dbf';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE
 
-- Database can now be opened normally.
ALTER DATABASE OPEN;
 
-- Commands to add tempfiles to temporary tablespaces.
-- Online tempfiles have complete space information.
-- Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE '/oradata/orcl/temp01.dbf'
     SIZE 30408704  REUSE AUTOEXTEND OFF;
-- End of tempfile additions.
--
--     Set #2. RESETLOGS case
--
-- The following commands will create a new control file and use it
-- to open the database.
-- Data used by Recovery Manager will be lost.
-- The contents of online logs will be lost and all backups will
-- be invalidated. Use this only if online logs are damaged.
 
-- After mounting the created controlfile, the following SQL
-- statement will place the database in the appropriate
-- protection mode:
--  ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE
 
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS  NOARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 '/oradata/orcl/redo01.log'  SIZE 120M BLOCKSIZE 512,
  GROUP 2 '/oradata/orcl/redo02.log'  SIZE 120M BLOCKSIZE 512,
  GROUP 3 '/oradata/orcl/redo03.log'  SIZE 120M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
  '/oradata/orcl/system01.dbf',
  '/oradata/orcl/sysaux01.dbf',
  '/oradata/orcl/undotbs01.dbf',
  '/oradata/orcl/users01.dbf',
  '/oradata/orcl/example01.dbf'
CHARACTER SET AL32UTF8
;
 
-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE '/archivelog/1_1_1069941729.dbf';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE USING BACKUP CONTROLFILE
 
-- Database can now be opened zeroing the online logs.
ALTER DATABASE OPEN RESETLOGS;
 
-- Commands to add tempfiles to temporary tablespaces.
-- Online tempfiles have complete space information.
-- Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE '/oradata/orcl/temp01.dbf'
     SIZE 30408704  REUSE AUTOEXTEND OFF;
-- End of tempfile additions.