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CountAggregate

scirs2_io::streaming::relational

Struct CountAggregate

pub struct CountAggregate { /* private fields */ }

Expand description

Count aggregate: counts the number of records seen.

Implementations§

impl CountAggregate

pub fn new(field_name: impl Into<String>) -> Self

Create a count aggregate with the given output field name.

Trait Implementations§

impl StreamingAggregate for CountAggregate

fn update(&mut self, _record: &Value)

Update the aggregate with one record.

fn result(&self) -> Value

Return the current aggregate result as a JSON value.

fn reset_agg(&mut self)

Reset the aggregate to its initial state.

fn name(&self) -> &str

Name of this aggregate (used as output field name).

Auto Trait Implementations§

impl Freeze for CountAggregate

impl RefUnwindSafe for CountAggregate

impl Send for CountAggregate

impl Sync for CountAggregate

impl Unpin for CountAggregate

impl UnsafeUnpin for CountAggregate

impl UnwindSafe for CountAggregate

Blanket Implementations§

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