Struct datafusion::physical_plan::SQLMetric

pub struct SQLMetric { /* fields omitted */ }

SQL metric such as counter (number of input or output rows) or timing information about a physical operator.

Implementations

impl SQLMetric

pub fn counter() -> Arc<SQLMetric>

Create a new metric for tracking a counter

pub fn time_nanos() -> Arc<SQLMetric>

Create a new metric for tracking time in nanoseconds

pub fn new(metric_type: MetricType) -> Self

Create a new SQLMetric

pub fn add(&self, n: usize)

Add to the value

pub fn add_elapsed(&self, start: Instant)

Add elapsed nanoseconds since startto self

pub fn value(&self) -> usize

Get the current value

Trait Implementations

impl Clone for SQLMetric

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SQLMetric

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

Formats the value using the given formatter.