Macro get_data_page_statistics 

macro_rules! get_data_page_statistics {
    (Min, $data_type: ident, $iterator: ident, $physical_type: ident) => { ... };
    (Max, $data_type: ident, $iterator: ident, $physical_type: ident) => { ... };
    (
        $data_type: ident,
        $iterator: ident,
        $physical_type: ident,
        $values_iter: ident,
        $page_statistics: ident
    ) => { ... };
}