Struct SumAccumulator

struct SumAccumulator<T: ArrowNativeTypeOp> {
    sum: T,
}

Fields

sum: T

Trait Implementations

impl<T: Clone + ArrowNativeTypeOp> Clone for SumAccumulator<T>

fn clone(&self) -> SumAccumulator<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: ArrowNativeTypeOp> Default for SumAccumulator<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: ArrowNativeTypeOp> NumericAccumulator<T> for SumAccumulator<T>

fn accumulate(&mut self, value: T)

Accumulate a non-null value.

fn accumulate_nullable(&mut self, value: T, valid: bool)

Accumulate a nullable values. If valid is false the value should not affect the accumulator state.

fn merge(&mut self, other: Self)

Merge another accumulator into this accumulator

fn finish(&mut self) -> T

Return the aggregated value.

impl<T: Copy + ArrowNativeTypeOp> Copy for SumAccumulator<T>