Using MySQL 8.0 "Upgrade Checker" on RDS The MySQL 8.0 Shell came with an "Upgrade Checker".

Useful to run before upgrading, as you may detect incompatible issues with your table structure / etc.

Running its python version from the shell be like:

util.check_for_server_upgrade()


Unfortunately, when using AWS's RDS, we get the following error:


  SystemError: LogicError: Util.check_for_server_upgrade: The upgrade
  check needs to be performed by user with ALL privileges.


What can be done?
You can run util.check_for_server_upgrade() with a Mysql user who has the ALL PRIVILEGES. As you are using AWS RDS your master MySQL user don't have SUPER user permission, that's why your are getting this error, you can check your user permission with SHOW GRANTS FOR 'user'@'host'. 
Only rdsadmin user have the ALL PRIVILEGES in AWS RDS MySQL instance. rdsadmin is amazon's own user that is used by Amazon to perform release or version update, taking backups and other maintenance tasks. Amazon's support should be able to advise you better in this topics.