Trait NumericAccumulator

trait NumericAccumulator<T: ArrowNativeTypeOp>: Copy + Default {
    // Required methods
    fn accumulate(&mut self, value: T);
    fn accumulate_nullable(&mut self, value: T, valid: bool);
    fn merge(&mut self, other: Self);
    fn finish(&mut self) -> T;
}

An accumulator for primitive numeric values.

Required Methods

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.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

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

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

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