Struct Zstd 

pub struct Zstd;

Zstd array encoding marker.

Implementations

impl Zstd

pub fn try_new( dtype: DType, data: ZstdData, validity: Validity, ) -> VortexResult<ZstdArray>

Construct a ZstdArray from validated compressed data and validity.

pub fn from_var_bin_view_without_dict( vbv: &VarBinViewArray, level: i32, values_per_frame: usize, ctx: &mut ExecutionCtx, ) -> VortexResult<ZstdArray>

Compress a VarBinViewArray using Zstd without a dictionary.

pub fn from_primitive( parray: &PrimitiveArray, level: i32, values_per_frame: usize, ctx: &mut ExecutionCtx, ) -> VortexResult<ZstdArray>

Compress a PrimitiveArray using Zstd.

pub fn from_var_bin_view( vbv: &VarBinViewArray, level: i32, values_per_frame: usize, ctx: &mut ExecutionCtx, ) -> VortexResult<ZstdArray>

Compress a VarBinViewArray using Zstd.

pub fn decompress( array: &ZstdArray, ctx: &mut ExecutionCtx, ) -> VortexResult<ArrayRef>

Decompress a ZstdArray into its canonical Vortex representation.

Trait Implementations

impl CastReduce for Zstd

fn cast( array: ArrayView<'_, Self>, dtype: &DType, ) -> VortexResult<Option<ArrayRef>>

impl Clone for Zstd

fn clone(&self) -> Zstd

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Zstd

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

Formats the value using the given formatter.

impl OperationsVTable<Zstd> for Zstd

fn scalar_at( array: ArrayView<'_, Zstd>, index: usize, ctx: &mut ExecutionCtx, ) -> VortexResult<Scalar>

Fetch the scalar at the given index.

impl SliceReduce for Zstd

fn slice( array: ArrayView<'_, Self>, range: Range<usize>, ) -> VortexResult<Option<ArrayRef>>

Slice an array with the provided range without reading buffers.

impl VTable for Zstd

type TypedArrayData = ZstdData

Per-array data owned by this encoding, excluding child arrays.

type OperationsVTable = Zstd

Scalar and element-wise operation hooks for this encoding.

type ValidityVTable = Zstd

Validity hook for nullable instances of this encoding.

fn id(&self) -> ArrayId

Returns the ID of the array.

fn validate( &self, data: &Self::TypedArrayData, dtype: &DType, len: usize, slots: &[Option<ArrayRef>], ) -> VortexResult<()>

Validates that externally supplied logical metadata matches the array data.

fn nbuffers(array: ArrayView<'_, Self>) -> usize

Returns the number of top-level buffers in the array.

fn buffer(array: ArrayView<'_, Self>, idx: usize) -> BufferHandle

Returns the buffer at the given index.

fn buffer_name(array: ArrayView<'_, Self>, idx: usize) -> Option<String>

Returns the name of the buffer at the given index, or None if unnamed.

fn with_buffers( &self, array: ArrayView<'_, Self>, buffers: &[BufferHandle], ) -> VortexResult<ArrayParts<Self>>

Rebuild this array with replacement top-level buffers.

fn serialize( array: ArrayView<'_, Self>, _session: &VortexSession, ) -> VortexResult<Option<Vec<u8>>>

Serialize encoding metadata into a byte buffer for IPC or file storage.

fn deserialize( &self, dtype: &DType, len: usize, metadata: &[u8], buffers: &[BufferHandle], children: &dyn ArrayChildren, _session: &VortexSession, ) -> VortexResult<ArrayParts<Self>>

Deserialize an array from serialized metadata, buffers, and children.

fn slot_name(_array: ArrayView<'_, Self>, idx: usize) -> String

Returns the name of the slot at the given index.

fn execute( array: Array<Self>, ctx: &mut ExecutionCtx, ) -> VortexResult<ExecutionResult>

Execute this array by returning an ExecutionResult.

fn reduce_parent( array: ArrayView<'_, Self>, parent: &ArrayRef, child_idx: usize, ) -> VortexResult<Option<ArrayRef>>

Attempt to reduce parent after this array appears as one of its children.

fn nchildren(array: ArrayView<'_, Self>) -> usize

Returns the number of children in the array.

fn child(array: ArrayView<'_, Self>, idx: usize) -> ArrayRef

Returns the child at the given index.

fn child_name(array: ArrayView<'_, Self>, idx: usize) -> String

Returns the name of the child at the given index.

fn append_to_builder( array: ArrayView<'_, Self>, builder: &mut dyn ArrayBuilder, ctx: &mut ExecutionCtx, ) -> Result<(), VortexError>

Writes the array’s logical values into a canonical builder.

fn reduce(array: ArrayView<'_, Self>) -> Result<Option<ArrayRef>, VortexError>

Attempt to reduce the array to a simpler representation without changing logical values.

impl ValidityVTable<Zstd> for Zstd

fn validity(array: ArrayView<'_, Zstd>) -> VortexResult<Validity>

Returns the Validity of the array.