Rework join filter pushdown rewrites to leave hints and apply adaptively - #23584

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NVIDIA:mainfrom

wence-:wence/fea/polars-filter-hint

Commits on Aug 7, 2026

Introduce PushdownFilterHint to represent semi joins in filter pushdown
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Apply adaptive prefilters to direct join inputs
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Apply adaptive prefilters from external domains
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Better names
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Separate prefilter eligibility from method selection
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Extract reusable prefilter execution helpers
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Expose reusable adaptive filtering utilities
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Execute non-adjacent pushdown filter hints
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Share adaptive input sampling
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Share adaptive prefilter execution
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Tidy
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Filters not connected to their direct joins are free-standing
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Ensure piecewise joins do not include prefilters
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Commits on Aug 10, 2026

Use asdict
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TableSizeStats offers distinct_count method
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Refactor to introduce JoinPlanningState.create
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Update comment
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