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Optimized way to count the numbers of true and false values in a BooleanArray #2963

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alamb opened this issue Oct 28, 2022 · 0 comments · Fixed by #2957
Closed

Optimized way to count the numbers of true and false values in a BooleanArray #2963

alamb opened this issue Oct 28, 2022 · 0 comments · Fixed by #2957
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arrow Changes to the arrow crate enhancement Any new improvement worthy of a entry in the changelog

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@alamb
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alamb commented Oct 28, 2022

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
I would like to generate statistics on how many rows pass a particular filter that was evaluated to BooleanArray

I know there are very fast ways to do this within the arrow codebase but I didn't see any good way to use them externally

Describe the solution you'd like
Optimized functions on BooleanArray

Describe alternatives you've considered
Use lower level Buffer apis

Additional context
apache/datafusion#3989 (comment)
@alamb alamb added arrow Changes to the arrow crate enhancement Any new improvement worthy of a entry in the changelog labels Oct 28, 2022
This was referenced Oct 28, 2022
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arrow Changes to the arrow crate enhancement Any new improvement worthy of a entry in the changelog
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Add BooleanArray::true_count and BooleanArray::false_count tustvold/arrow-rs
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@alamb