Struct DataPage

pub struct DataPage {
    pub descriptor: Descriptor,
    pub num_rows: Option<usize>,
    /* private fields */
}

A DataPage is an uncompressed, encoded representation of a Parquet data page. It holds actual data and thus cloning it is expensive.

Fields

descriptor: Descriptor

num_rows: Option<usize>

Implementations

impl DataPage

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

pub fn header(&self) -> &DataPageHeader

pub fn buffer(&self) -> &[u8]

pub fn buffer_mut(&mut self) -> &mut Vec<u8>

Returns a mutable reference to the internal buffer. Useful to recover the buffer after the page has been decoded.

pub fn num_values(&self) -> usize

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

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

pub fn encoding(&self) -> Encoding

pub fn definition_level_encoding(&self) -> Encoding

pub fn repetition_level_encoding(&self) -> Encoding

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

Decodes the raw statistics into a statistics

Trait Implementations

impl Clone for DataPage

fn clone(&self) -> DataPage

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DataPage

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

Formats the value using the given formatter.