AggregateStreamInner

datafusion_physical_plan::aggregates::no_grouping

Struct AggregateStreamInner 

Source 
struct AggregateStreamInner {
    schema: SchemaRef,
    mode: AggregateMode,
    input: SendableRecordBatchStream,
    baseline_metrics: BaselineMetrics,
    aggregate_expressions: Vec<Vec<Arc<dyn PhysicalExpr>>>,
    filter_expressions: Vec<Option<Arc<dyn PhysicalExpr>>>,
    accumulators: Vec<AccumulatorItem>,
    reservation: MemoryReservation,
    finished: bool,
}
Expand description

Actual implementation of AggregateStream.

This is wrapped into yet another struct because we need to interact with the async memory management subsystem during poll. To have as little code “weirdness” as possible, we chose to just use [BoxStream] together with [futures::stream::unfold].

The latter requires a state object, which is AggregateStreamInner.

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§schema: SchemaRef§mode: AggregateMode§input: SendableRecordBatchStream§baseline_metrics: BaselineMetrics§aggregate_expressions: Vec<Vec<Arc<dyn PhysicalExpr>>>§filter_expressions: Vec<Option<Arc<dyn PhysicalExpr>>>§accumulators: Vec<AccumulatorItem>§reservation: MemoryReservation§finished: bool

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