Documentation Home
MySQL 8.0 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 45.6Mb
PDF (A4) - 45.7Mb
PDF (RPM) - 41.2Mb
HTML Download (TGZ) - 10.5Mb
HTML Download (Zip) - 10.6Mb
HTML Download (RPM) - 9.1Mb
Man Pages (TGZ) - 209.9Kb
Man Pages (Zip) - 312.1Kb
Info (Gzip) - 4.1Mb
Info (Zip) - 4.1Mb
Excerpts from this Manual

6.2.9 Reserved Accounts

One part of the MySQL installation process is data directory initialization (see Section 2.10.1, “Initializing the Data Directory”). During data directory initialization, MySQL creates user accounts that should be considered reserved:

  • 'root'@'localhost: Used for administrative purposes. This account has all privileges, is a system account, and can perform any operation.

    Strictly speaking, this account name is not reserved, in the sense that some installations rename the root account to something else to avoid exposing a highly privileged account with a well-known name.

  • 'mysql.sys'@'localhost': Used as the DEFINER for sys schema objects. Use of the mysql.sys account avoids problems that occur if a DBA renames or removes the root account. This account is locked so that it cannot be used for client connections.

  • 'mysql.session'@'localhost': Used internally by plugins to access the server. This account is locked so that it cannot be used for client connections. The account is a system account.

  • 'mysql.infoschema'@'localhost': Used as the DEFINER for INFORMATION_SCHEMA views. Use of the mysql.infoschema account avoids problems that occur if a DBA renames or removes the root account. This account is locked so that it cannot be used for client connections.