Trait tidb_query_executors::interface::ExecSummaryCollector

pub trait ExecSummaryCollector: Send {
    type DurationRecorder;
    pub fn new(output_index: usize) -> Self;
    pub fn on_start_iterate(&mut self) -> Self::DurationRecorder;
    pub fn on_finish_iterate(&mut self, dr: Self::DurationRecorder, rows: usize);
    pub fn collect(&mut self, target: &mut [ExecSummary]);
}

A trait for all execution summary collectors.

Associated Types

type DurationRecorder

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Required methods

pub fn new(output_index: usize) -> Self

Creates a new instance with specified output slot index.

pub fn on_start_iterate(&mut self) -> Self::DurationRecorder

Returns an instance that will record elapsed duration and increase the iterations counter. The instance should be later passed back to on_finish_iterate when processing of next_batch is completed.

pub fn on_finish_iterate(&mut self, dr: Self::DurationRecorder, rows: usize)

pub fn collect(&mut self, target: &mut [ExecSummary])

Takes and appends current execution summary into target.

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Implementations on Foreign Types

impl ExecSummaryCollector for ExecSummaryCollectorDisabled

type DurationRecorder = ()

pub fn new(_output_index: usize) -> ExecSummaryCollectorDisabled

pub fn on_start_iterate(
    &mut self
) -> <ExecSummaryCollectorDisabled as ExecSummaryCollector>::DurationRecorder

pub fn on_finish_iterate(
    &mut self,
    _dr: <ExecSummaryCollectorDisabled as ExecSummaryCollector>::DurationRecorder,
    _rows: usize
)

pub fn collect(&mut self, _target: &mut [ExecSummary])

impl ExecSummaryCollector for ExecSummaryCollectorEnabled

type DurationRecorder = Instant

pub fn new(output_index: usize) -> ExecSummaryCollectorEnabled

pub fn on_start_iterate(
    &mut self
) -> <ExecSummaryCollectorEnabled as ExecSummaryCollector>::DurationRecorder

pub fn on_finish_iterate(
    &mut self,
    dr: <ExecSummaryCollectorEnabled as ExecSummaryCollector>::DurationRecorder,
    rows: usize
)

pub fn collect(&mut self, target: &mut [ExecSummary])

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Implementors

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