Struct CompressedDataPage

pub struct CompressedDataPage {
    pub num_rows: Option<usize>,
    /* private fields */
}

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

Fields

num_rows: Option<usize>

Implementations

impl CompressedDataPage

pub fn new( header: DataPageHeader, buffer: CowBuffer, compression: Compression, uncompressed_page_size: usize, descriptor: Descriptor, num_rows: usize, ) -> Self

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 num_values(&self) -> usize

pub fn num_rows(&self) -> Option<usize>

pub fn statistics(&self) -> Option<ParquetResult<Statistics>>

Decodes the raw statistics into a statistics

pub fn slice_mut(&mut self) -> &mut CowBuffer

Trait Implementations

impl Debug for CompressedDataPage

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

Formats the value using the given formatter.