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https://issues.apache.org/jira/browse/ARROW-14254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17425767#comment-17425767
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Weston Pace commented on ARROW-14254:
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No. In that case are you asking for a streaming pseudo-sample as I described
before? I suppose we could create a "pipeline breaking sample" which collects
the entire table (spilling over as needed) to get the mid-query count, and then
emits a sampled output.
> [C++] Return a random sample of rows from a query
> -------------------------------------------------
>
> Key: ARROW-14254
> URL: https://issues.apache.org/jira/browse/ARROW-14254
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Nicola Crane
> Priority: Major
> Labels: kernel
>
> Please can we have a kernel that returns a random sample of rows? We've had a
> request to be able to do this in R:
> https://github.com/apache/arrow-cookbook/issues/83
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