[O] export code snippet in beamer with different fonts

[Luca Ferrari]

Hi all,
in my org files I've got examples like:

#+begin_src sql
testdb=# alter role simon with nologin;
testdb=# alter role group_a with login;
#+end_src

and in my latex theme I've got:

setbeamerfont{verbatim}{size=\tiny}

This is ok for most of my examples, but here are my questions:
1) the highlight seems not to work, all the text is made in fixed size
font but in plain back (no keyword highlighted). How can I circumvent
this?
2) is it possible to tella latex to export the snippet at the max size
available in the page? Something like
#+LaTeX: \resizebox{\textwidth}{!}{ ... }
that I place around my tables.

Thanks,
Luca