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https://issues.apache.org/jira/browse/ARROW-5835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield resolved ARROW-5835.
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Resolution: Fixed
Fix Version/s: 1.0.0
Issue resolved by pull request 4792
[https://github.com/apache/arrow/pull/4792]
> [Java] Support Dictionary Encoding for binary type
> --------------------------------------------------
>
> Key: ARROW-5835
> URL: https://issues.apache.org/jira/browse/ARROW-5835
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Java
> Reporter: Ji Liu
> Assignee: Ji Liu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 5h 20m
> Remaining Estimate: 0h
>
> Now is not implemented because byte array is not supported to be HashMap key.
> One possible way is that wrap them with something to implement equals and
> hashcode.
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