Struct arrow::ipc::gen::Message::FieldNode

#[repr(C, align(8))]pub struct FieldNode { /* fields omitted */ }

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Data structures for describing a table row batch (a collection of equal-length Arrow arrays) Metadata about a field at some level of a nested type tree (but not its children).

For example, a List with values [[1, 2, 3], null, [4], [5, 6], null] would have {length: 5, null_count: 2} for its List node, and {length: 6, null_count: 0} for its Int16 node, as separate FieldNode structs

Implementations

impl FieldNode

pub fn new<'a>(_length: i64, _null_count: i64) -> Self

pub fn length<'a>(&'a self) -> i64

The number of value slots in the Arrow array at this level of a nested tree

pub fn null_count<'a>(&'a self) -> i64

The number of observed nulls. Fields with null_count == 0 may choose not to write their physical validity bitmap out as a materialized buffer, instead setting the length of the bitmap buffer to 0.

Trait Implementations

impl Clone for FieldNode

fn clone(&self) -> FieldNode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for FieldNode

impl Debug for FieldNode

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

Formats the value using the given formatter.

impl<'a> Follow<'a> for FieldNode

type Inner = &'a FieldNode

fn follow(buf: &'a [u8], loc: usize) -> Self::Inner

impl<'a> Follow<'a> for &'a FieldNode

type Inner = &'a FieldNode

fn follow(buf: &'a [u8], loc: usize) -> Self::Inner

impl PartialEq<FieldNode> for FieldNode

fn eq(&self, other: &FieldNode) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &FieldNode) -> bool

This method tests for !=.

impl<'b> Push for FieldNode

type Output = FieldNode

fn push(&self, dst: &mut [u8], _rest: &[u8])

fn size() -> usize

fn alignment() -> PushAlignment

impl<'b> Push for &'b FieldNode

type Output = FieldNode

fn push(&self, dst: &mut [u8], _rest: &[u8])

fn size() -> usize

fn alignment() -> PushAlignment

impl SafeSliceAccess for FieldNode

impl StructuralPartialEq for FieldNode