ORA-01666: control file is for a standby database - failover over standby as primary

ORA-01666: control file is for a standby database - failover over standby as primary

SQL> select name,open_mode ,database_role from v$database;
NAME      OPEN_MODE            DATABASE_ROLE
--------- -------------------- ----------------
PROD     READ ONLY            PHYSICAL STANDBY

SQL> shut immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup mount;
ORACLE instance started.
Total System Global Area 3.4206E+10 bytes
Fixed Size                  2238616 bytes
Variable Size            3422553960 bytes
Database Buffers         3.0736E+10 bytes
Redo Buffers               45682688 bytes
Database mounted.

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01666: control file is for a standby database

SQL> select name,open_mode,database_role from v$database;
NAME      OPEN_MODE            DATABASE_ROLE
--------- -------------------- ----------------
PROD     MOUNTED              PHYSICAL STANDBY

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
Database altered.

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
Database altered.

SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY
*
ERROR at line 1:
ORA-16139: media recovery required

SOLUTION:

-- Fail-over
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH;
Database altered.

SQL> ALTER DATABASE ACTIVATE STANDBY DATABASE;
Database altered.

-- Now verify the database status

SQL> select name,open_mode ,database_role from v$database;
NAME      OPEN_MODE            DATABASE_ROLE
--------- -------------------- ----------------
PROD      MOUNTED              PRIMARY

-- Now open the database

SQL> alter database open;
Database altered.

SQL> select name,open_mode ,database_role from v$database;
NAME      OPEN_MODE            DATABASE_ROLE
--------- -------------------- ----------------
PROD      READ WRITE           PRIMARY

-- If you have flashback on, make it off if you want.

SQL> alter database flashback off;
Database altered.