SELECT @@global.keyring_file;
@@global.keyring_file
mysecret_keyring
SET @@global.keyring_file= 'new_keyring_file';
SELECT @@global.keyring_file;
@@global.keyring_file
new_keyring_file
SET @@global.keyring_file= '../../../../../bad_dir/bad_keyring_file';
ERROR 42000: Variable 'keyring_file' can't be set to the value of '../../../../../bad_dir/bad_keyring_file'
SELECT @@global.keyring_file;
@@global.keyring_file
new_keyring_file
SET @@global.keyring_file= 'mysecret_keyring';