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create user test_user@localhost;
create role test_role;
grant select on *.* to test_role;
grant test_role to test_user@localhost;
connect c1, localhost, test_user,,;
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 where user = 'test_user';
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table `mysql`.`user`
set default role test_role;
select user, host, default_role from mysql.user where user = 'test_user';
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table `mysql`.`user`
disconnect c1;
connection default;
select user, host, default_role from mysql.user where user = 'test_user';
User Host default_role
test_user localhost test_role
connect c1, localhost, test_user,,;
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`
SET DEFAULT ROLE `test_role` FOR `test_user`@`localhost`
select user, host, default_role from mysql.user where user = 'test_user';
User Host default_role
test_user localhost test_role
set default role NONE;
disconnect c1;
connection default;
select user, host, default_role from mysql.user where user = 'test_user';
User Host default_role
test_user localhost
connect c1, localhost, test_user,,;
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 where user = 'test_user';
ERROR 42000: SELECT command denied to user 'test_user'@'localhost' for table `mysql`.`user`
disconnect c1;
connection default;
select user, host, default_role from mysql.user where user = 'test_user';
User Host default_role
test_user localhost
set default role test_role for test_user@localhost;
connect c1, localhost, test_user,,;
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`
SET DEFAULT ROLE `test_role` FOR `test_user`@`localhost`
select user, host, default_role from mysql.user where user = 'test_user';
User Host default_role
test_user localhost test_role
disconnect c1;
connection default;
drop role test_role;
drop user test_user@localhost;
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