show status like 'debug%';
Variable_name	Value
set @old_dbug=@@global.debug_dbug;
set global debug_dbug="+d,role_merge_stats";
create user foo@localhost;
create role role1;
create role role2;
create role role3;
create role role4;
create role role5;
create role role6;
create role role7;
create role role8;
create role role9;
create role role10;
grant role1 to role2;
grant role2 to role4;
grant role2 to role5;
grant role3 to role5;
grant role4 to role6;
grant role5 to role6;
grant role5 to role7;
grant role6 to role8;
grant role6 to role9;
grant role7 to role9;
grant role9 to role10;
grant role10 to foo@localhost;
grant role10 to role2;
ERROR HY000: Cannot grant role 'role10' to: 'role2'.
show grants;
Grants for foo@localhost
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT role10 TO 'foo'@'localhost'
select * from information_schema.applicable_roles;
GRANTEE	ROLE_NAME	IS_GRANTABLE
foo@localhost	role10	NO
role10	role9	NO
role2	role1	NO
role4	role2	NO
role5	role2	NO
role5	role3	NO
role6	role4	NO
role6	role5	NO
role7	role5	NO
role9	role6	NO
role9	role7	NO
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	11
Debug_role_merges_db	0
Debug_role_merges_table	0
Debug_role_merges_column	0
Debug_role_merges_routine	0
grant select on *.* to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	19
Debug_role_merges_db	0
Debug_role_merges_table	0
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role role10;
select count(*) from mysql.roles_mapping;
count(*)
22
show grants;
Grants for foo@localhost
GRANT SELECT ON *.* TO 'role1'
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT USAGE ON *.* TO 'role10'
GRANT USAGE ON *.* TO 'role2'
GRANT USAGE ON *.* TO 'role3'
GRANT USAGE ON *.* TO 'role4'
GRANT USAGE ON *.* TO 'role5'
GRANT USAGE ON *.* TO 'role6'
GRANT USAGE ON *.* TO 'role7'
GRANT USAGE ON *.* TO 'role9'
GRANT role1 TO 'role2'
GRANT role10 TO 'foo'@'localhost'
GRANT role2 TO 'role4'
GRANT role2 TO 'role5'
GRANT role3 TO 'role5'
GRANT role4 TO 'role6'
GRANT role5 TO 'role6'
GRANT role5 TO 'role7'
GRANT role6 TO 'role9'
GRANT role7 TO 'role9'
GRANT role9 TO 'role10'
select * from information_schema.enabled_roles;
ROLE_NAME
role1
role10
role2
role3
role4
role5
role6
role7
role9
revoke select on *.* from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	0
Debug_role_merges_table	0
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
count(*)
22
set role none;
set role role10;
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role none;
grant select on mysql.* to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	8
Debug_role_merges_table	0
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role role10;
select count(*) from mysql.roles_mapping;
count(*)
22
show grants;
Grants for foo@localhost
GRANT SELECT ON `mysql`.* TO 'role1'
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT USAGE ON *.* TO 'role1'
GRANT USAGE ON *.* TO 'role10'
GRANT USAGE ON *.* TO 'role2'
GRANT USAGE ON *.* TO 'role3'
GRANT USAGE ON *.* TO 'role4'
GRANT USAGE ON *.* TO 'role5'
GRANT USAGE ON *.* TO 'role6'
GRANT USAGE ON *.* TO 'role7'
GRANT USAGE ON *.* TO 'role9'
GRANT role1 TO 'role2'
GRANT role10 TO 'foo'@'localhost'
GRANT role2 TO 'role4'
GRANT role2 TO 'role5'
GRANT role3 TO 'role5'
GRANT role4 TO 'role6'
GRANT role5 TO 'role6'
GRANT role5 TO 'role7'
GRANT role6 TO 'role9'
GRANT role7 TO 'role9'
GRANT role9 TO 'role10'
revoke select on mysql.* from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	0
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role none;
grant select on mysql.roles_mapping to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	8
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role role10;
select count(*) from mysql.roles_mapping;
count(*)
22
show grants;
Grants for foo@localhost
GRANT SELECT ON `mysql`.`roles_mapping` TO 'role1'
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT USAGE ON *.* TO 'role1'
GRANT USAGE ON *.* TO 'role10'
GRANT USAGE ON *.* TO 'role2'
GRANT USAGE ON *.* TO 'role3'
GRANT USAGE ON *.* TO 'role4'
GRANT USAGE ON *.* TO 'role5'
GRANT USAGE ON *.* TO 'role6'
GRANT USAGE ON *.* TO 'role7'
GRANT USAGE ON *.* TO 'role9'
GRANT role1 TO 'role2'
GRANT role10 TO 'foo'@'localhost'
GRANT role2 TO 'role4'
GRANT role2 TO 'role5'
GRANT role3 TO 'role5'
GRANT role4 TO 'role6'
GRANT role5 TO 'role6'
GRANT role5 TO 'role7'
GRANT role6 TO 'role9'
GRANT role7 TO 'role9'
GRANT role9 TO 'role10'
revoke select on mysql.roles_mapping from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	16
Debug_role_merges_column	0
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role none;
grant select(User) on mysql.roles_mapping to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	24
Debug_role_merges_column	8
Debug_role_merges_routine	0
select count(*) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role role10;
select count(concat(User,Host,Role)) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for column 'Host' in table 'roles_mapping'
select count(concat(User)) from mysql.roles_mapping;
count(concat(User))
22
show grants;
Grants for foo@localhost
GRANT SELECT (User) ON `mysql`.`roles_mapping` TO 'role1'
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT USAGE ON *.* TO 'role1'
GRANT USAGE ON *.* TO 'role10'
GRANT USAGE ON *.* TO 'role2'
GRANT USAGE ON *.* TO 'role3'
GRANT USAGE ON *.* TO 'role4'
GRANT USAGE ON *.* TO 'role5'
GRANT USAGE ON *.* TO 'role6'
GRANT USAGE ON *.* TO 'role7'
GRANT USAGE ON *.* TO 'role9'
GRANT role1 TO 'role2'
GRANT role10 TO 'foo'@'localhost'
GRANT role2 TO 'role4'
GRANT role2 TO 'role5'
GRANT role3 TO 'role5'
GRANT role4 TO 'role6'
GRANT role5 TO 'role6'
GRANT role5 TO 'role7'
GRANT role6 TO 'role9'
GRANT role7 TO 'role9'
GRANT role9 TO 'role10'
grant select(Host) on mysql.roles_mapping to role3;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	30
Debug_role_merges_column	14
Debug_role_merges_routine	0
select count(concat(User,Host,Role)) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for column 'Role' in table 'roles_mapping'
select count(concat(User,Host)) from mysql.roles_mapping;
count(concat(User,Host))
22
show grants;
Grants for foo@localhost
GRANT SELECT (Host) ON `mysql`.`roles_mapping` TO 'role3'
GRANT SELECT (User) ON `mysql`.`roles_mapping` TO 'role1'
GRANT USAGE ON *.* TO 'foo'@'localhost'
GRANT USAGE ON *.* TO 'role1'
GRANT USAGE ON *.* TO 'role10'
GRANT USAGE ON *.* TO 'role2'
GRANT USAGE ON *.* TO 'role3'
GRANT USAGE ON *.* TO 'role4'
GRANT USAGE ON *.* TO 'role5'
GRANT USAGE ON *.* TO 'role6'
GRANT USAGE ON *.* TO 'role7'
GRANT USAGE ON *.* TO 'role9'
GRANT role1 TO 'role2'
GRANT role10 TO 'foo'@'localhost'
GRANT role2 TO 'role4'
GRANT role2 TO 'role5'
GRANT role3 TO 'role5'
GRANT role4 TO 'role6'
GRANT role5 TO 'role6'
GRANT role5 TO 'role7'
GRANT role6 TO 'role9'
GRANT role7 TO 'role9'
GRANT role9 TO 'role10'
revoke select(User) on mysql.roles_mapping from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	38
Debug_role_merges_column	22
Debug_role_merges_routine	0
select count(concat(User,Host)) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for column 'User' in table 'roles_mapping'
select count(concat(Host)) from mysql.roles_mapping;
count(concat(Host))
22
revoke select(Host) on mysql.roles_mapping from role3;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	44
Debug_role_merges_column	28
Debug_role_merges_routine	0
select count(concat(Host)) from mysql.roles_mapping;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table 'roles_mapping'
set role none;
create procedure pr1() select "pr1";
create function fn1() returns char(10) return "fn1";
grant execute on procedure test.pr1 to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	44
Debug_role_merges_column	28
Debug_role_merges_routine	8
call pr1();
ERROR 42000: execute command denied to user 'foo'@'localhost' for routine 'test.pr1'
set role role10;
call pr1();
pr1
pr1
select fn1();
ERROR 42000: execute command denied to user 'foo'@'localhost' for routine 'test.fn1'
grant execute on function test.fn1 to role5;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	44
Debug_role_merges_column	28
Debug_role_merges_routine	13
select fn1();
fn1()
fn1
revoke execute on procedure test.pr1 from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	44
Debug_role_merges_column	28
Debug_role_merges_routine	21
call pr1();
ERROR 42000: execute command denied to user 'foo'@'localhost' for routine 'test.pr1'
select fn1();
fn1()
fn1
revoke execute on function test.fn1 from role5;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	44
Debug_role_merges_column	28
Debug_role_merges_routine	26
select fn1();
ERROR 42000: execute command denied to user 'foo'@'localhost' for routine 'test.fn1'
set role none;
drop procedure pr1;
drop function fn1;
grant select on mysql.roles_mapping to role3;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	50
Debug_role_merges_column	28
Debug_role_merges_routine	26
grant select on mysql.roles_mapping to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	53
Debug_role_merges_column	28
Debug_role_merges_routine	26
revoke select on mysql.roles_mapping from role3;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	54
Debug_role_merges_column	28
Debug_role_merges_routine	26
revoke select on mysql.roles_mapping from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	16
Debug_role_merges_table	62
Debug_role_merges_column	28
Debug_role_merges_routine	26
grant select on mysql.* to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	24
Debug_role_merges_table	62
Debug_role_merges_column	28
Debug_role_merges_routine	26
grant select on test.* to role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	32
Debug_role_merges_table	62
Debug_role_merges_column	28
Debug_role_merges_routine	26
revoke select on mysql.* from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	40
Debug_role_merges_table	62
Debug_role_merges_column	28
Debug_role_merges_routine	26
revoke select on test.* from role1;
show status like 'debug%';
Variable_name	Value
Debug_role_merges_global	27
Debug_role_merges_db	48
Debug_role_merges_table	62
Debug_role_merges_column	28
Debug_role_merges_routine	26
drop user foo@localhost;
drop role role1;
drop role role2;
drop role role3;
drop role role4;
drop role role5;
drop role role6;
drop role role7;
drop role role8;
drop role role9;
drop role role10;
set global debug_dbug=@old_dbug;
