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https://issues.apache.org/jira/browse/ARROW-6306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-6306:
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Labels: pull-request-available (was: )
> [Java] Support stable sort by stable comparators
> ------------------------------------------------
>
> Key: ARROW-6306
> URL: https://issues.apache.org/jira/browse/ARROW-6306
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Java
> Reporter: Liya Fan
> Assignee: Liya Fan
> Priority: Major
> Labels: pull-request-available
>
> Stable sort is desirable in many scenarios. It means equal elements preserve
> their relative order after sorting.
> There are stable sort algorithms. However, in practice, the best sort
> algorithm is quick sort and quick sort is not stable.
> To make the best of both worlds, we support stable sort by stable
> comparators. It differs from an ordinary comparator in that it breaks ties by
> comparing the value indices.
> With the stable comparator, the quick sort algorithm becomes a stable
> algorithm.
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