[−][src]Struct arrow::ipc::gen::Message::FieldNode
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<Int16>
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
Methods
impl FieldNode
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pub fn new<'a>(_length: i64, _null_count: i64) -> Self
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pub fn length<'a>(&'a self) -> i64
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The number of value slots in the Arrow array at this level of a nested tree
pub fn null_count<'a>(&'a self) -> i64
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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 PartialEq<FieldNode> for FieldNode
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impl Copy for FieldNode
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impl Clone for FieldNode
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fn clone(&self) -> FieldNode
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Debug for FieldNode
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impl<'b> Push for FieldNode
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type Output = FieldNode
fn push(&self, dst: &mut [u8], _rest: &[u8])
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fn size() -> usize
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fn alignment() -> PushAlignment
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impl<'b> Push for &'b FieldNode
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type Output = FieldNode
fn push(&self, dst: &mut [u8], _rest: &[u8])
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fn size() -> usize
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fn alignment() -> PushAlignment
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impl SafeSliceAccess for FieldNode
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impl<'a> Follow<'a> for FieldNode
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impl<'a> Follow<'a> for &'a FieldNode
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Auto Trait Implementations
impl Sync for FieldNode
impl Send for FieldNode
impl Unpin for FieldNode
impl RefUnwindSafe for FieldNode
impl UnwindSafe for FieldNode
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> FromCast<T> for T
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impl<T, U> Cast<U> for T where
U: FromCast<T>,
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U: FromCast<T>,