V$ACCESS displays information about locks that are currently imposed on library cache objects. The locks are imposed to ensure that they are not aged out of the library cache while they are required for SQL execution.
Session number that is accessing an object
Owner of the object
Name of the object
Type identifier for the object
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 multitenant container database (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