trapping db wrapper errors

[eluser]matt2012[/eluser]
if I run

Code:

$this->db->insert($table,$post);

and there is a problem the error gets echoed to page
can I email the error instead?

[eluser]matt2012[/eluser]
ok - so ive turned on

Code:

$config['log_threshold'] = 1;

which tells me I have a query error Im still not getting the actual error message.