13.5.1. Account Management Statements
MySQL account information is stored in the tables of the
mysql database. This database and the access
control system are discussed extensively in
Chapter 5, Database Administration, which you should
consult for additional details.
Important: Some releases of
MySQL introduce changes to the structure of the grant tables to
add new privileges or features. Whenever you update to a new
version of MySQL, you should update your grant tables to make
sure that they have the current structure so that you can take
advantage of any new capabilities. See
Section 5.5.2, “mysql_upgrade — Check Tables for MySQL Upgrade”.