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

#[repr(transparent)]
pub struct FieldNode(pub [u8; 16]);

---

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(length: i64, null_count: i64) -> Self

pub fn length(&self) -> i64

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

pub fn set_length(&mut self, x: i64)

pub fn null_count(&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.

pub fn set_null_count(&mut self, x: i64)

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 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<'a> Verifiable for FieldNode

fn run_verifier(
    v: &mut Verifier<'_, '_>,
    pos: usize
) -> Result<(), InvalidFlatbuffer>

Runs the verifier for this type, assuming its at position pos in the verifier’s buffer. Should not need to be called directly.

impl Copy for FieldNode

impl SafeSliceAccess for FieldNode

impl SimpleToVerifyInSlice for FieldNode

impl StructuralPartialEq for FieldNode