protected function columnKey($key, $sql)
{
$arguments = func_get_args();
array_shift($arguments);
$rows = call_user_func_array(array($this, 'rows'), $arguments);
if (is_array($key)) {
return Arrays::subsOnKey($rows, $key['key'] ? $key['key'] : $key[0], $key['value'] ? $key['value'] : $key[1]);
} else {
return Arrays::subsOnKey($rows, $key);
}
}
