Codeigniter ActiveRecord:gå med i backticking

Bara en enkel lösning, ful, inte elegant, men det fungerar i det här fallet:

$original_reserved = $this->db->_reserved_identifiers;
$this->db->_reserved_identifiers[] = 5;
$this->db->_reserved_identifiers[] = 1;
// or any other values
$this->db->join('with critical values and conditions');
// some db-stuff
$this->db->_reserved_identifiers = $original_reserved;

Om någon vet bättre, visa det!