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ColumnationChunker

mz_timely_util::columnation

Struct ColumnationChunker 

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pub struct ColumnationChunker<T: Columnation> {
    pending: Vec<T>,
    ready: VecDeque<ColumnationStack<T>>,
    empty: Option<ColumnationStack<T>>,
}
Expand description

Chunk a stream of vectors into chains of columnation stacks.

This chunker accumulates into a Vec (not a ColumnationStack) for efficient in-place sorting and consolidation, then copies the consolidated results into ColumnationStack chunks. This avoids the cost of sorting through columnation indirection.

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§pending: Vec<T>§ready: VecDeque<ColumnationStack<T>>§empty: Option<ColumnationStack<T>>

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impl<D, T, R> ContainerBuilder for ColumnationChunker<(D, T, R)>
where D: Columnation + Ord + Clone + 'static, T: Columnation + Ord + Clone + 'static, R: Columnation + Semigroup + Clone + 'static,

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type Container = ColumnationStack<(D, T, R)>

The container type we’re building.
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fn extract(&mut self) -> Option<&mut Self::Container>

Extract assembled containers, potentially leaving unfinished data behind. Can be called repeatedly, for example while the caller can send data. Read more
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fn finish(&mut self) -> Option<&mut Self::Container>

Extract assembled containers and any unfinished data. Should be called repeatedly until it returns None.
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fn relax(&mut self)

Indicates a good moment to release resources. Read more
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impl<T: Columnation> Default for ColumnationChunker<T>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'a, D, T, R> PushInto<&'a mut Vec<(D, T, R)>> for ColumnationChunker<(D, T, R)>
where D: Columnation + Ord + Clone, T: Columnation + Ord + Clone, R: Columnation + Semigroup + Clone,

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fn push_into(&mut self, container: &'a mut Vec<(D, T, R)>)

Push item into self.

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