Struct parquet2::read::ColumnIterator

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pub struct ColumnIterator<R: Read + Seek> { /* private fields */ }
Expand description

A MutStreamingIterator that reads column chunks one by one, returning a PageReader per column.

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impl<R: Read + Seek> ColumnIterator<R>

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pub fn new( reader: R, columns: Vec<ColumnChunkMetaData>, page_filter: Option<PageFilter>, scratch: Vec<u8>, max_page_size: usize ) -> Self

Returns a new ColumnIterator max_page_size is the maximum allowed page size

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impl<R> !RefUnwindSafe for ColumnIterator<R>

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impl<R> Send for ColumnIterator<R>where R: Send,

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impl<R> Sync for ColumnIterator<R>where R: Sync,

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impl<R> Unpin for ColumnIterator<R>where R: Unpin,

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impl<R> !UnwindSafe for ColumnIterator<R>

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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<U> for Twhere 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, U> TryFrom<U> for Twhere U: Into<T>,

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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<U>>::Error>

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

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.