datafusion_functions_aggregate_common::aggregate::groups_accumulator

Struct AccumulatorState

struct AccumulatorState {
    accumulator: Box<dyn Accumulator>,
    indices: Vec<u32>,
}

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§accumulator: Box<dyn Accumulator>

[Accumulator] that stores the per-group state

§indices: Vec<u32>

scratch space: indexes in the input array that will be fed to this accumulator. Stores indexes as u32 to match the arrow take kernel input.

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impl AccumulatorState

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fn new(accumulator: Box<dyn Accumulator>) -> Self

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fn size(&self) -> usize

Returns the amount of memory taken by this structure and its accumulator

Auto Trait Implementations§

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impl !UnwindSafe for AccumulatorState

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where T: 'static + ?Sized,

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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

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where F: FnOnce(&Self) -> bool,

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