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https://issues.apache.org/jira/browse/DRILL-7503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011406#comment-17011406
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ASF GitHub Bot commented on DRILL-7503:
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paul-rogers commented on issue #1944: DRILL-7503: Refactor the project operator
URL: https://github.com/apache/drill/pull/1944#issuecomment-572380826
Thank you @ihuzenko and @arina-ielchiieva for your reviews. Addressed
remaining minor issues. Squashed commits.
@ihuzenko, your many suggestions made this a much better solution. It is
almost, but not quite, clean enough that I could write code gen unit tests.
Need to clean up that pesky `ExpressionTreeMaterializer` issue, then we'll be
able to write such tests.
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> Refactor project operator
> -------------------------
>
> Key: DRILL-7503
> URL: https://issues.apache.org/jira/browse/DRILL-7503
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.17.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
> Fix For: 1.18.0
>
>
> Work on another ticket revealed that the Project operator ("record batch")
> has grown quite complex. The setup phase lives in the operator as one huge
> function. The function combines the "logical" tasks of working out the
> projection expressions and types, the code gen for those expressions, and the
> physical setup of vectors.
> The refactoring breaks up the logic so that it is easier to focus on the
> specific bits of interest.
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