public function column($field)
    {
        $field = $this->field($field);

        $isNumeric = preg_match('/^(integer|float|boolean)$/', (string) $field['type']);
        if ($isNumeric && $field['default'] === '') {
            $field['null'] = true;
            $field['default'] = null;
        }
        $field['use'] = strtolower($field['use']);
        return $this->_column($field);
    }