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https://issues.apache.org/jira/browse/ARROW-12340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17319535#comment-17319535
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Micah Kornfield commented on ARROW-12340:
-----------------------------------------
CC [~tianchen92]
> [Java] Avro to Arrow converter doesn't appear to generate valid arrow data
> --------------------------------------------------------------------------
>
> Key: ARROW-12340
> URL: https://issues.apache.org/jira/browse/ARROW-12340
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Micah Kornfield
> Priority: Major
>
> I think this is related to how Unions are handled (I had thought unions of
> with a null and one other type would get created to the nullable type, but
> that is a separate issue).
>
> I haven't had time to fully diagnose, but remnants of the code I tried to use
> are at [https://gist.github.com/emkornfield/efd3a4c3c1012dc19cf9769198e3bffe]
>
> And the CSV file from
> https://issues.apache.org/jira/browse/ARROW-11629?jql=text%20~%20%22arrow%20drill%20parquet%20dictionary%22
>
> produce data that isn't readable by the C++ implementation.
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