Struct ToArrowConverter

Source

pub struct ToArrowConverter {
    pub skip_attach_pl_metadata: bool,
    pub categorical_converter: CategoricalToArrowConverter,
}

Expand description

Low-level converter that exports ArrayRefs from Polars Series to arrow arrays.

This can be held to perform repeated categorical exports with persisted indices to ensure the exported chunks use the same set of indices.

Fields§

§skip_attach_pl_metadata: bool

If the arrow_field being passed was generated by DataType::to_arrow_field, it will already have polars metadata.

§categorical_converter: CategoricalToArrowConverter

Available on crate feature dtype-categorical only.

Implementations§

Source §

impl ToArrowConverter

Source

pub fn array_to_arrow<'a>( &mut self, array: &(dyn Array + 'static), dtype: &DataType, arrow_field: Cow<'a, Field>, ) -> Result<Box<dyn Array>, PolarsError>

Returns an error if output_arrow_field was provided and does not match the output data type.

Auto Trait Implementations§

§

impl !UnwindSafe for ToArrowConverter

Blanket Implementations§

Source §

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

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

impl<T> Borrow<T> for T
where T: ?Sized,

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source §

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

Mutably borrows from an owned value. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<T> Instrument for T

§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

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

Source §

fn into(self) -> U

Calls U::from(self).

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

Source §

impl<T> IntoEither for T

Source §

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

Source §

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

§