engine

The target Oracle DB engine when you convert a non-CDB to a CDB. This intermediate step is necessary to upgrade an Oracle Database 19c non-CDB to an Oracle Database 21c CDB.

Note the following requirements:

• Make sure that you specify oracle-ee-cdb or oracle-se2-cdb.

• Make sure that your DB engine runs Oracle Database 19c with an April 2021 or later RU.

Note the following limitations:

• You can't convert a CDB to a non-CDB.

• You can't convert a replica database.

• You can't convert a non-CDB to a CDB and upgrade the engine version in the same command.

• You can't convert the existing custom parameter or option group when it has options or parameters that are permanent or persistent. In this situation, the DB instance reverts to the default option and parameter group. To avoid reverting to the default, specify a new parameter group with --db-parameter-group-name and a new option group with --option-group-name.