ALTER USER

Alters settings associated with the user.

Syntax

ALTER USER user[@host] [IDENTIFIED BY 'password'] [ACCOUNT UNLOCK]
[SET [DEFAULT RESOURCE POOL = poolname] [FAILED_LOGIN_ATTEMPTS = integer] [PASSWORD_LOCK_TIME = integer]]
[REQUIRE {SSL | NONE}]

Arguments

  • user: The name of the user.
  • host: The host that the user can connect from. For example, specifying localhost means the user account can be used only when connecting from the local host. If no host is explicitly specified, the % wildcard will be used, which allows the user to connect from any host.
  • password: An optional database connection password.
  • poolname: The new default resource pool.
  • ACCOUNT UNLOCK: Unlocks an account that has been locked out due to exceeding the failed login attempts limit.
  • FAILED_LOGIN_ATTEMPTS: Together with PASSWORD_LOCK_TIME, specifies the failed login attempt lockout behavior. FAILED_LOGIN_ATTEMPTS is the number of failed attempts allowed before the account is locked out. Default is 0 which means there is no restriction. When set to a value >=1, PASSWORD_LOCK_TIME must also be specified.
  • PASSWORD_LOCK_TIME: Together with FAILED_LOGIN_ATTEMPTS, specifies the failed login attempt lockout behavior. PASSWORD_LOCK_TIME is the number of seconds a locked out account must wait before reattempting to log in.
  • REQUIRE: SSL option ensures that the user connects via SSL. NONE specifies that SSL will not be required for the connection.

For more information about failed login attempt lockout behavior, see Securing MemSQL.

Examples

The following example demonstrates how to add a new user with a resource pool, and then change the resource pool.

CREATE USER joe WITH DEFAULT RESOURCE POOL = general;
ALTER USER joe SET DEFAULT RESOURCE POOL = executive;
ALTER USER joe ACCOUNT UNLOCK;

The following example requires SSL on the user db_mgr:

ALTER USER 'db_mgr' REQUIRE SSL;