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https://issues.apache.org/jira/browse/DRILL-3876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14939006#comment-14939006
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Chris Westin commented on DRILL-3876:
-------------------------------------
DRILL-3874 happens because the flatten operator passes through the original
field as well as the computed field. At this time, operators (and planning
around their use) don't support the capability of just passing through columns
that will be required in the final result, which would have avoided that
problem. There may be other operators besides flatten that may need this to
work within smaller memory limits.
> Operators should not require a subsequent project to strip columns that
> aren't required
> ---------------------------------------------------------------------------------------
>
> Key: DRILL-3876
> URL: https://issues.apache.org/jira/browse/DRILL-3876
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 1.2.0
> Reporter: Chris Westin
>
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