delete from mysql.user where user like 'mysqltest\_%';
delete from mysql.db where user like 'mysqltest\_%';
flush privileges;
grant all privileges on `my\_%`.* to mysqltest_1@localhost with grant option;
select current_user();
current_user()
mysqltest_1@localhost
grant all privileges on `my\_1`.* to mysqltest_9@localhost with grant option;
ERROR 42000: Access denied for user: 'mysqltest_1@localhost' to database 'my\_1'
grant all privileges on `my_%`.* to mysqltest_2@localhost with grant option;
select current_user();
current_user()
mysqltest_2@localhost
grant all privileges on `mysql`.* to mysqltest_3@localhost with grant option;
select current_user();
current_user()
mysqltest_3@localhost
show grants for mysqltest_3@localhost;
Grants for mysqltest_3@localhost
GRANT USAGE ON *.* TO 'mysqltest_3'@'localhost'
GRANT ALL PRIVILEGES ON `mysql`.* TO 'mysqltest_3'@'localhost' WITH GRANT OPTION
delete from mysql.user where user like 'mysqltest\_%';
delete from mysql.db where user like 'mysqltest\_%';
flush privileges;