Do you come here often? 12.2 change in behavior for DBA_USERS.LAST_LOGIN with Proxy Authentication
The behavior of the LAST_LOGIN field on DBA_USERS has changed with respect to proxy authentication (for the better I think). Proxy authentication is an feature of the Oracle Database that effective allows you to be connected as one user (the client user to use Oracle’s terminology), but using the credentials of another user (the proxy …