vortex_scan

Struct RangeScanner

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pub struct RangeScanner { /* private fields */ }

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impl RangeScanner

We implement the range scan via polling for the next operation to perform, and then posting the result back to the range scan to make progress.

This allows us to minimize the amount of logic we duplicate in order to support both synchronous and asynchronous evaluation.

§A note on the API of evaluator functions
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pub fn evaluate<E>(self, evaluator: E) -> VortexResult<Option<ArrayData>>
where E: Fn(RowMask, ExprRef) -> VortexResult<ArrayData>,

Evaluate the RangeScanner operation using a synchronous expression evaluator.

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pub async fn evaluate_async<E, F>( self, evaluator: E, ) -> VortexResult<Option<ArrayData>>
where E: Fn(RowMask, ExprRef) -> F, F: Future<Output = VortexResult<ArrayData>>,

Evaluate the RangeScanner operation using an async expression evaluator.

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