Struct arrow2::io::parquet::read::CompressedDataPage

pub struct CompressedDataPage { /* private fields */ }

Available on crate feature io_parquet only.

A CompressedDataPage is compressed, encoded representation of a Parquet data page. It holds actual data and thus cloning it is expensive.

Implementations

impl CompressedDataPage

pub fn new(
    header: DataPageHeader,
    buffer: Vec<u8, Global>,
    compression: Compression,
    uncompressed_page_size: usize,
    descriptor: Descriptor,
    rows: Option<usize>
) -> CompressedDataPage

Returns a new CompressedDataPage.

pub fn header(&self) -> &DataPageHeader

pub fn uncompressed_size(&self) -> usize

pub fn compressed_size(&self) -> usize

pub fn compression(&self) -> Compression

The compression of the data in this page. Note that what is compressed in a page depends on its version: in V1, the whole data ([repetition levels][definition levels][values]) is compressed; in V2 only the values are compressed.

pub fn selected_rows(&self) -> Option<&[Interval]>

the rows to be selected by this page. When None, all rows are to be considered.

pub fn num_values(&self) -> usize

pub fn statistics(&self) -> Option<Result<Arc<dyn Statistics + 'static>, Error>>

Decodes the raw statistics into a statistics

Trait Implementations

impl Debug for CompressedDataPage

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.