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https://issues.apache.org/jira/browse/ARROW-6888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield resolved ARROW-6888.
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Fix Version/s: 1.0.0
Resolution: Fixed
Issue resolved by pull request 5659
[https://github.com/apache/arrow/pull/5659]
> [Java] Support copy operation for vector value comparators
> ----------------------------------------------------------
>
> Key: ARROW-6888
> URL: https://issues.apache.org/jira/browse/ARROW-6888
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Java
> Reporter: Liya Fan
> Assignee: Liya Fan
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> In this issue, we provide copy operations for vector value comparators. This
> operation creates another comparator with the same type and comparison logic.
> This feature is useful in multi-threading scenarios where multiple threads
> uses the comparator to perform their own task. In this scenario, we have no
> way of making sure the compare method is thread safe. So a safe way is to
> create a new comparator for each thread. The copy operation will support this.
> An immediate application of this is the parallel searcher for ordering
> semantics.
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