Struct CompressedBufferEncoder 

pub struct CompressedBufferEncoder { /* private fields */ }

Implementations

impl CompressedBufferEncoder

pub fn try_new(compression_config: CompressionConfig) -> Result<Self>

pub fn from_scheme(scheme: CompressionScheme) -> Result<Self>

impl CompressedBufferEncoder

pub fn per_value_compress<T: ArrowNativeType>( &self, data: &[u8], offsets: &[T], compressed: &mut Vec<u8>, ) -> Result<LanceBuffer>

pub fn per_value_decompress<T: ArrowNativeType>( &self, data: &[u8], offsets: &[T], decompressed: &mut Vec<u8>, ) -> Result<LanceBuffer>

Trait Implementations

impl ArrayEncoder for CompressedBufferEncoder

fn encode( &self, data: DataBlock, _data_type: &DataType, buffer_index: &mut u32, ) -> Result<EncodedArray>

impl BlockCompressor for CompressedBufferEncoder

fn compress( &self, data: DataBlock, ) -> Result<(Option<LanceBuffer>, CompressiveEncoding)>

Compress the data into zero or one buffers and describe the codec used.

impl BlockDecompressor for CompressedBufferEncoder

fn decompress( &self, data: Option<LanceBuffer>, num_values: u64, ) -> Result<DataBlock>

fn requires_payload(&self) -> bool

Whether this codec consumes one payload buffer.

fn infer_num_values(&self, _data: &LanceBuffer) -> Result<Option<u64>>

Inspect a block for an exact payload-derived value count when supported.

impl Debug for CompressedBufferEncoder

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

Formats the value using the given formatter.

impl Default for CompressedBufferEncoder

fn default() -> Self

Returns the “default value” for a type.

impl PerValueCompressor for CompressedBufferEncoder

fn compress( &self, data: DataBlock, ) -> Result<(PerValueDataBlock, CompressiveEncoding)>

Compress the data into a single buffer

impl VariablePerValueDecompressor for CompressedBufferEncoder

fn decompress(&self, data: VariableWidthBlock) -> Result<DataBlock>

Decompress one or more values