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https://issues.apache.org/jira/browse/ARROW-5997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield resolved ARROW-5997.
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Resolution: Fixed
Fix Version/s: 1.0.0
Issue resolved by pull request 4917
[https://github.com/apache/arrow/pull/4917]
> [Java] Support dictionary encoding for Union type
> -------------------------------------------------
>
> Key: ARROW-5997
> URL: https://issues.apache.org/jira/browse/ARROW-5997
> Project: Apache Arrow
> Issue Type: New Feature
> Reporter: Ji Liu
> Assignee: Ji Liu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Now only Union type is not supported in dictionary encoding.
> In the last several weeks, we did some refactor for encoding and now it's
> time to support Union type.
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