V$BLOCK_CHANGE_TRACKING displays the status of block change tracking for the database.
Status of block change tracking in the database:
DISABLED - Block change tracking is disabled
TRANSITION - Block change tracking is in the process of transitioning between the enabled and disabled states. The TRANSITION state should usually never be observed, because it only exists while enabling or disabling block change tracking. This state might be observed if the instance crashed while enabling or disabling block change tracking, in which case it will be cleaned up automatically the next time that the database is opened.
ENABLED - Block change tracking is enabled
Name of the block change tracking file for the database
Size of the block change tracking file (in bytes)
The ID of the container to which the data pertains. Possible values include:
0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.
1: This value is used for rows containing data that pertain to only the root
n: Where n is the applicable container ID for the rows containing data