Parallel bounded RANGE-frame window functions without PARTITION BY (draft)#23026

Draft

avantgardnerio wants to merge 12 commits into

apache:mainfrom

coralogix:brent/parallel-window

Commits on Jun 18, 2026

ParallelWindow optimizer skeleton: probe per-partition stats for RANGE-frame windows

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ParallelWindow: compute global min/max + equal-width interior boundaries

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ParallelWindow: extract frame halo and log halo-expanded bucket ranges

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Add runtime_statistics() trait method + log SortExec runtime min/max

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before big refactor
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Replace runtime_statistics with SortExtremes; populate inside the sort path

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RangeRepartitionExec: K-way coordinator + global extremes log

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Move boundary/halo computation into RangeRepartitionExec coordinator

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RangeRepartitionExec: actually route rows with halo duplication

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ParallelWindow: run pre-EnsureRequirements with parallel-aware BWAG
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pass
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Rename SortExtremes → PartitionExtremes; document dual semantics
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