Struct parquet::arrow::arrow_reader::ArrowPredicateFn

pub struct ArrowPredicateFn<F> { /* private fields */ }

Expand description

An ArrowPredicate created from an FnMut

Implementations§

impl<F> ArrowPredicateFn<F>
where F: FnMut(RecordBatch) -> Result<BooleanArray, ArrowError> + Send + 'static,

pub fn new(projection: ProjectionMask, f: F) -> Self

Create a new ArrowPredicateFn. f will be passed batches that contains the columns specified in projection and returns a BooleanArray that describes which rows should be passed along

Trait Implementations§

impl<F> ArrowPredicate for ArrowPredicateFn<F>
where F: FnMut(RecordBatch) -> Result<BooleanArray, ArrowError> + Send + 'static,

fn projection(&self) -> &ProjectionMask

Returns the ProjectionMask that describes the columns required to evaluate this predicate. All projected columns will be provided in the batch passed to evaluate

fn evaluate(&mut self, batch: RecordBatch) -> Result<BooleanArray, ArrowError>

Evaluate this predicate for the given RecordBatch containing the columns identified by Self::projection Read more

Auto Trait Implementations§

impl<F> Freeze for ArrowPredicateFn<F>
where F: Freeze,

impl<F> RefUnwindSafe for ArrowPredicateFn<F>
where F: RefUnwindSafe,

impl<F> Send for ArrowPredicateFn<F>
where F: Send,

impl<F> Sync for ArrowPredicateFn<F>
where F: Sync,

impl<F> Unpin for ArrowPredicateFn<F>
where F: Unpin,

impl<F> UnwindSafe for ArrowPredicateFn<F>
where F: UnwindSafe,

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

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