如何授予MySQL用户文件系统权限？

Question

为了使用xtrabackup工具对MySQL 8进行完整备份，我正在创建一个backup_admin用户并尝试授予filesystem所需的权限，但不能：

mysql> GRANT READ, EXECUTE ON DIRECTORY '/var/lib/mysql/data/' TO backup_admin@localhost;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'READ, EXECUTE ON '/var/lib/mysql/data/' TO backup_admin@localhost' at line 1

是否有办法向MySQL用户授予GRANT READ, EXECUTE的{​​{1}}权限？