source include/not_embedded.inc;

#create a user with no privileges
create user test_user@localhost;
create role test_role1;
create role test_role2;

grant test_role1 to test_user@localhost;
grant test_role2 to test_user@localhost;
grant test_role2 to test_role1;
--sorted_result
select user, host from mysql.user where user not like 'root';
--sorted_result
select * from mysql.roles_mapping;

--sorted_result
select user, host from mysql.db;

grant select on mysql.* to test_role2;
flush privileges;

change_user 'test_user';

--error ER_TABLEACCESS_DENIED_ERROR
select * from mysql.roles_mapping;

select current_user(), current_role();
set role test_role1;
select current_user(), current_role();
--sorted_result
select * from mysql.roles_mapping;
set role none;
select current_user(), current_role();
--error ER_TABLEACCESS_DENIED_ERROR
select * from mysql.roles_mapping;
set role test_role2;
select current_user(), current_role();
--sorted_result
select * from mysql.roles_mapping;

change_user 'root';

create role test_role3;
grant test_role3 to test_role2;
create role test_role4;
grant test_role4 to test_role3;

change_user 'test_user';
set role test_role1;
--error ER_TABLEACCESS_DENIED_ERROR
delete from mysql.user where user='no such user';

change_user 'root';
grant delete on mysql.* to test_role4;

change_user 'test_user';
set role test_role1;
delete from mysql.user where user='no such user';
--sorted_result
show grants;

change_user 'root';
drop user test_user@localhost;
drop role test_role1, test_role2, test_role3, test_role4;