Struct polars_plan::logical_plan::FileCacher

source ·

pub struct FileCacher { /* private fields */ }

Available on crate features ipc or parquet or csv-file or cse only.

Expand description

Aggregate all the columns used in csv scans and make sure that all columns are scanned in one go. Due to self joins there can be multiple Scans of the same file in a LP. We already cache the scans in the PhysicalPlan, but we need to make sure that the first scan has all the columns needed.

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Struct polars_plan::logical_plan::FileCacher

Auto Trait Implementations§

impl !RefUnwindSafe for FileCacher

impl Send for FileCacher

impl Sync for FileCacher

impl Unpin for FileCacher

impl !UnwindSafe for FileCacher

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

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 Twhere U: Into<T>,

type Error = Infallible

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

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

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

fn vzip(self) -> V

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

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

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

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

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

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

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