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https://issues.apache.org/jira/browse/DRILL-6373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16509907#comment-16509907
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ASF GitHub Bot commented on DRILL-6373:
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paul-rogers commented on issue #1244: DRILL-6373: Refactor Result Set Loader
for Union, List support
URL: https://github.com/apache/drill/pull/1244#issuecomment-396669212
@vrozov, I agree that there is a bug somewhere. We are faced with a dilemma.
On the one hand, we have the set of constraints described earlier. On the other
hand, we have a preference about not mutating `MaterializedField` and that
`PartitionSender` should not have to clone `MaterializedField`s when making
copies.
How do you propose we reconcile the technical constraint with the
preference?
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> Refactor the Result Set Loader to prepare for Union, List support
> -----------------------------------------------------------------
>
> Key: DRILL-6373
> URL: https://issues.apache.org/jira/browse/DRILL-6373
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.13.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
> Fix For: 1.14.0
>
>
> As the next step in merging the "batch sizing" enhancements, refactor the
> {{ResultSetLoader}} and related classes to prepare for Union and List
> support. This fix follows the refactoring of the column accessors for the
> same purpose. Actual Union and List support is to follow in a separate PR.
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