ParameterMetaData return NULL

[ArvinLovegood]

// 0.3.2-patch10
@OverRide
public ParameterMetaData getParameterMetaData() throws SQLException {
// TODO Auto-generated method stub
return null;
}

// old version in package: ru.yandex.clickhouse
@OverRide
public ParameterMetaData getParameterMetaData() throws SQLException {
throw new SQLFeatureNotSupportedException();
}

why not stay the same ?
It is easy to cause a NullPointerException.

[zhicwu]

I should implement this method instead.