Struct parquet::decoding::DeltaLengthByteArrayDecoder

pub struct DeltaLengthByteArrayDecoder<T: DataType> { /* fields omitted */ }

Delta length byte array decoder. Only applied to byte arrays to separate the length values and the data, the lengths are encoded using DELTA_BINARY_PACKED encoding. See DeltaLengthByteArrayEncoder for more information.

Methods

impl<T: DataType> DeltaLengthByteArrayDecoder<T>

pub fn new() -> Self

Creates new delta length byte array decoder.

Trait Implementations

impl<T: DataType> Decoder<T> for DeltaLengthByteArrayDecoder<T>

fn set_data(&mut self, _: ByteBufferPtr, _: usize) -> Result<()>

Sets the data to decode to be data, which should contain num_values of values to decode.

fn get(&mut self, _: &mut [T::T]) -> Result<usize>

Consumes values from this decoder and write the results to buffer. This will try to fill up buffer.

fn values_left(&self) -> usize

Returns the number of values left in this decoder stream.

fn encoding(&self) -> Encoding

Returns the encoding for this decoder.

impl Decoder<ByteArrayType> for DeltaLengthByteArrayDecoder<ByteArrayType>

fn set_data(&mut self, data: ByteBufferPtr, num_values: usize) -> Result<()>

Sets the data to decode to be data, which should contain num_values of values to decode.

fn get(&mut self, buffer: &mut [ByteArray]) -> Result<usize>

Consumes values from this decoder and write the results to buffer. This will try to fill up buffer.

fn values_left(&self) -> usize

Returns the number of values left in this decoder stream.

fn encoding(&self) -> Encoding

Returns the encoding for this decoder.