DROP USER Syntax
The DROP USER statement removes one or more MariaDB accounts and their privileges. It removes privilege rows for the account from all grant tables. To use this statement, you must have the global CREATE USER privilege or the DELETE privilege for the MariaDB database. Each account name uses the format described in , "Specifying Account Names". For example:
DROP USER 'jeffrey'@'localhost';
If you specify only the user name part of the account name, a host name part of '%' is used.Important
DROP USER does not automatically close any open user sessions. Rather, in the event that a user with an open session is dropped, the statement does not take effect until that user's session is closed. Once the session is closed, the user is dropped, and that user's next attempt to log in will fail. This is by design.
DROP USER does not automatically drop or invalidate databases or objects within them that the old user created. This includes stored programs or views for which the DEFINER attribute names the dropped user. Attempts to access such objects may produce an error if they execute in definer security context. (For information about security context, see , "Access Control for Stored Programs and Views".)