Setting up additional PDO options doesn't seem to work

In config I have the following array of options:

    'port' => 13306,
        'charset' => 'utf8',
        'options' => [ 
            PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES GREEK',
            PDO::ATTR_PERSISTENT => 1,
            PDO::ATTR_EMULATE_PREPARES => 0,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION

But the result set is still utf8, most probabbly since 'charset' = 'utf8'.

If I issue same command just before the SELECT query like:

!$db->execute('SET NAMES GREEK') && exit('SET NAMES FAILURE. STOP RUN.');

Then it works. The result set is encoded propertly.

I wonder what's the use of global PDO options if it doesn't work? Or am I missing something.

print_r($di->get('config')->database->options);

Phalcon\Config Object
(
    [12] => 1
    [1002] => SET NAMES GREEK
    [20] => 0
    [3] => 2
)