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https://issues.apache.org/jira/browse/DRILL-5546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16037481#comment-16037481
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Paul Rogers commented on DRILL-5546:
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Agreed. Just to clarify, the idea of a "non-existent batch" is confusing. Yes,
NONE means that there are no more batches. If the only outcome is NONE ("fast
NONE"), then that means that there is no output: not a batch with empty schema,
rather that there is no batch at all (a null batch.) That's what the ∧ is
supposed to mean...
> Schema change problems caused by empty batch
> --------------------------------------------
>
> Key: DRILL-5546
> URL: https://issues.apache.org/jira/browse/DRILL-5546
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Jinfeng Ni
> Assignee: Jinfeng Ni
>
> There have been a few JIRAs opened related to schema change failure caused by
> empty batch. This JIRA is opened as an umbrella for all those related JIRAS (
> such as DRILL-4686, DRILL-4734, DRILL4476, DRILL-4255, etc).
>
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