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https://issues.apache.org/jira/browse/ARROW-12763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson updated ARROW-12763:
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Labels: query-engine (was: )
> [R] Optimize dplyr queries that use head/tail after arrange
> -----------------------------------------------------------
>
> Key: ARROW-12763
> URL: https://issues.apache.org/jira/browse/ARROW-12763
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: Ian Cook
> Assignee: Alexander Ocsa
> Priority: Major
> Labels: query-engine
> Fix For: 6.0.0
>
>
> Use the Arrow C++ function {{partition_nth_indices}} to optimize dplyr
> queries like this:
> {code:r}
> iris %>%
> Table$create() %>%
> arrange(desc(Sepal.Length)) %>%
> head(10) %>%
> collect()
> {code}
> This query sorts the full table even though it doesn't need to. It could use
> {{partition_nth_indices}} to find the rows containing the top 10 values of
> {{Sepal.Length}} and only collect and sort those 10 rows.
> Test to see if this improves performance in practice on larger data.
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