param.go
func (p Param) Int32() (int32, error) {
	i, err := strconv.ParseInt(string(p), 10, 32)
	return int32(i), err
}
func (p Param) Int32() (int32, error) {
	i, err := strconv.ParseInt(string(p), 10, 32)
	return int32(i), err
}
// Int32 returns param as int32