parquet::arrow::arrow_reader

Struct ArrowPredicateFn

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pub struct ArrowPredicateFn<F> {
    f: F,
    projection: ProjectionMask,
}
Expand description

An ArrowPredicate created from an FnMut

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§f: F§projection: ProjectionMask

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

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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

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

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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
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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§

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

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

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

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

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

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

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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,

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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,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> IntoEither for T

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

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type Error = Infallible

The type returned in the event of a conversion error.
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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 T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T