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create user test_user@localhost;
create role test_role;
create role not_granted_role;
grant select on *.* to test_role;
grant test_role to test_user@localhost;
show grants;
Grants for test_user@localhost
GRANT test_role TO 'test_user'@'localhost'
GRANT USAGE ON *.* TO 'test_user'@'localhost'
select user, host, default_role from mysql.user;
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table 'user'
set default role invalid_role;
ERROR OP000: Invalid role specification `invalid_role`.
set default role not_granted_role;
ERROR OP000: Invalid role specification `not_granted_role`.
set default role test_role;
select user, host, default_role from mysql.user;
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table 'user'
select user, host, default_role from mysql.user where user='test_user';
user host default_role
test_user localhost test_role
show grants;
Grants for test_user@localhost
GRANT test_role TO 'test_user'@'localhost'
GRANT USAGE ON *.* TO 'test_user'@'localhost'
GRANT SELECT ON *.* TO 'test_role'
select user, host, default_role from mysql.user where user='test_user';
user host default_role
test_user localhost test_role
set default role invalid_role;
ERROR OP000: Invalid role specification `invalid_role`.
select user, host, default_role from mysql.user where user='test_user';
user host default_role
test_user localhost test_role
revoke test_role from test_user@localhost;
select user, host, default_role from mysql.user where user='test_user';
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table 'user'
drop role test_role;
drop role not_granted_role;
drop user test_user@localhost;
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