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https://issues.apache.org/jira/browse/ARROW-7151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kietzman updated ARROW-7151:
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Summary: [C++][Dataset] Refactor ExpressionEvaluator to yield Arrays (was:
[C++] Refactor ExpressionEvaluator to yield Arrays)
> [C++][Dataset] Refactor ExpressionEvaluator to yield Arrays
> -----------------------------------------------------------
>
> Key: ARROW-7151
> URL: https://issues.apache.org/jira/browse/ARROW-7151
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++, C++ - Dataset
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Fix For: 1.0.0
>
>
> Currently expressions can be evaluated to scalars or arrays, mostly to
> accomodate ScalarExpression. Instead let all expressions be evaluable to
> Array only. ScalarExpression will evaluate to an array of repeated values,
> but expressions whose corresponding kernels can accept a scalar directly
> (comparison, for example) can avoid materializing this array.
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