Struct polars::export::arrow::io::parquet::read::ReadColumnIterator

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pub struct ReadColumnIterator { /* private fields */ }

This is supported on crate feature io_parquet only.

Expand description

A MutStreamingIterator of pre-read column chunks

Implementations

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impl ReadColumnIterator

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pub fn new(
field: ParquetType,
chunks: Vec<(Vec<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData ), Global>
) -> ReadColumnIterator

Trait Implementations

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impl ColumnChunkIter<IntoIter<Result<CompressedDataPage, ParquetError>, Global>> for ReadColumnIterator

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fn field(&self) -> &ParquetType

The field associated to the set of column chunks this iterator iterates over.

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impl Debug for ReadColumnIterator

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

Formats the value using the given formatter. Read more

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impl MutStreamingIterator for ReadColumnIterator

type Item = (IntoIter<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData )

type Error = ParquetError

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fn advance(self) -> Result<State<ReadColumnIterator>, ParquetError>

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fn get(
&mut self
) -> Option<&mut <ReadColumnIterator as MutStreamingIterator>::Item>

Auto Trait Implementations

impl !RefUnwindSafe for ReadColumnIterator

impl Send for ReadColumnIterator

impl Sync for ReadColumnIterator

impl Unpin for ReadColumnIterator

impl !UnwindSafe for ReadColumnIterator

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,

const: unstable · source

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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<V, T> VZip<V> for T where
V: MultiLane<T>,

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Struct polars::export::arrow::io::parquet::read::ReadColumnIterator

Implementations

impl ReadColumnIterator

pub fn new( field: ParquetType, chunks: Vec<(Vec<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData), Global>) -> ReadColumnIterator

Trait Implementations

impl ColumnChunkIter<IntoIter<Result<CompressedDataPage, ParquetError>, Global>> for ReadColumnIterator

fn field(&self) -> &ParquetType

impl Debug for ReadColumnIterator

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

impl MutStreamingIterator for ReadColumnIterator

type Item = (IntoIter<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData)

type Error = ParquetError

fn advance(self) -> Result<State<ReadColumnIterator>, ParquetError>

fn get( &mut self) -> Option<&mut <ReadColumnIterator as MutStreamingIterator>::Item>

Auto Trait Implementations

impl !RefUnwindSafe for ReadColumnIterator

impl Send for ReadColumnIterator

impl Sync for ReadColumnIterator

impl Unpin for ReadColumnIterator

impl !UnwindSafe for ReadColumnIterator

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

pub fn new(
field: ParquetType,
chunks: Vec<(Vec<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData ), Global>
) -> ReadColumnIterator

type Item = (IntoIter<Result<CompressedDataPage, ParquetError>, Global>, ColumnChunkMetaData )

fn get(
&mut self
) -> Option<&mut <ReadColumnIterator as MutStreamingIterator>::Item>

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

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

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

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

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

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,