Is session->userdata supposed to return an array?

[eluser]Unknown[/eluser]
No custom library. Just the default one, autoloaded.

Oh my, I've given false information in the first post. Apparently the array originates straight from the database.

Code:

$query = $this->db->query("SELECT id FROM users WHERE user = 'asd'");
$id = $query->result();

I'm brand new to CI, so I might be oblivious about correct syntax etc. Any ideas?