DROP ROLE [IF EXISTS] role [, role ] ...

DROP ROLE removes one or more roles (named collections of privileges). To use this statement, you must have the global DROP ROLE or CREATE USER privilege.

If a role to be dropped is named in the mandatory_roles system variable value, it cannot be dropped.

DROP ROLE either succeeds for all named roles or rolls back and has no effect if any error occurs. By default, an error occurs if you try to drop a role that does not exist. If the IF EXISTS clause is given, the statement produces a warning for each named role that does not exist, rather than an error.

The statement is written to the binary log if it succeeds, but not if it fails; in that case, rollback occurs and no changes are made. A statement written to the binary log includes all named roles. If the IF EXISTS clause is given, this includes even roles that do not exist and were not dropped.

Each role name uses the format described in Section 6.2.5, “Specifying Role Names”. For example:

DROP ROLE 'administrator', 'developer';
DROP ROLE 'webapp'@'localhost';

The host name part of the role name, if omitted, defaults to '%'.

A dropped role is automatically revoked from any user account (or role) to which the role was granted. Within any current session for such an account, its privileges are adjusted for the next statement executed.