[jira] [Created] (ARROW-5997) [Java] Support dictionary encoding for Union type

[Ji Liu (JIRA)]

Ji Liu created ARROW-5997:
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             Summary: [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


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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