$r = dba::insert('conv', $fields);
$r = dba::select('conv', array('id'), array('guid' => $conv_guid, 'uid' => $recipient['uid']), array('limit' => 1));
$r = dba::insert('conv', $fields);
$r = dba::select('conv', array('id'), array('guid' => $conv_guid, 'uid' => $recipient['uid']), array('limit' => 1));