RMAN: BACKUP DATABASE KEEP FOREVER OPTION 12C

I got to know about this option when I saw a configured backup script in an environment running Oracle Database 12c with Zero Data Loss Recovery Appliance (Recovery Appliance). Then I started to search about this and although Oracle Documentation doesn’t really show a lof about this option I could understand that it is one of the types of the long-term backup retention and then the backup or copy never expires.. However, one of the prerequisite to use this option is to have a recovery catalog because the control file…