DMZ 1.7.1 (DataMapper OverZealous Edition)

[eluser]OverZealous[/eluser]
@The Hamburgler
Yup, yer doin' it wrong, should be:

Code:

$contact->select_func('SUBSTRING', '@last_name', 1, 1, 'letter')->group_by('letter')->get();

Also, if you are still having trouble, please see the note on the functions page about modifying the protect identifiers method.