Struct polars::export::arrow::io::parquet::read::CompressedDataPage

pub struct CompressedDataPage { /* private fields */ }

This is supported 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,
    dictionary_page: Option<Arc<dyn DictPage + 'static>>,
    descriptor: ColumnDescriptor
) -> CompressedDataPage

pub fn header(&self) -> &DataPageHeader

pub fn uncompressed_size(&self) -> usize

pub fn compressed_size(&self) -> usize

pub fn compression(&self) -> Compression

pub fn num_values(&self) -> usize

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

Decodes the raw statistics into a statistics

pub fn descriptor(&self) -> &ColumnDescriptor

Trait Implementations

impl Compressed for CompressedDataPage

fn is_compressed(&self) -> bool

impl Debug for CompressedDataPage

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

Formats the value using the given formatter.