Struct SampleAggregator 

pub struct SampleAggregator { /* private fields */ }

SAMPLE aggregator (returns first non-null value)

Implementations

impl SampleAggregator

pub fn new() -> Self

Trait Implementations

impl Aggregator for SampleAggregator

fn accumulate(&mut self, value: Option<&Value>)

Process a single value

fn finalize(&self) -> Value

Get the final aggregated result

fn reset(&mut self)

Reset for new group

fn new_instance(&self) -> Box<dyn Aggregator>

Create a fresh copy for a new group

fn name(&self) -> &'static str

Name of the aggregator

impl Clone for SampleAggregator

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SampleAggregator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SampleAggregator

fn default() -> Self

Returns the “default value” for a type.