arrow::array

Enum Capacities

pub enum Capacities {
    Binary(usize, Option<usize>),
    List(usize, Option<Box<Capacities>>),
    Struct(usize, Option<Vec<Capacities>>),
    Dictionary(usize, Option<Box<Capacities>>),
    Array(usize),
}
Expand description

Define capacities to pre-allocate for child data or data buffers.

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Binary(usize, Option<usize>)

Binary, Utf8 and LargeUtf8 data types

Defines

  • the capacity of the array offsets
  • the capacity of the binary/ str buffer
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List(usize, Option<Box<Capacities>>)

List and LargeList data types

Defines

  • the capacity of the array offsets
  • the capacity of the child data
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Struct(usize, Option<Vec<Capacities>>)

Struct type

Defines

  • the capacity of the array
  • the capacities of the fields
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Dictionary(usize, Option<Box<Capacities>>)

Dictionary type

Defines

  • the capacity of the array/keys
  • the capacity of the values
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Array(usize)

Don’t preallocate inner buffers and rely on array growth strategy

Trait Implementations§

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impl Clone for Capacities

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fn clone(&self) -> Capacities

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Capacities

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> Ungil for T
where T: Send,