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https://issues.apache.org/jira/browse/DRILL-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326423#comment-14326423
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Yuliya Feldman commented on DRILL-2209:
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Review board request is created: https://reviews.apache.org/r/30965/
> Save on CPU cycles by adding Project with column that has hash calculated
> -------------------------------------------------------------------------
>
> Key: DRILL-2209
> URL: https://issues.apache.org/jira/browse/DRILL-2209
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow, Query Planning & Optimization
> Reporter: Yuliya Feldman
> Assignee: Yuliya Feldman
>
> Related to DRILL-133. Wrapping HashToRandomExhcnage and/or LocalExchange with
> Project operator with additional column that represents hash function of
> column(s) we are hashing on. This is to save CPU cycles and not recalculate
> hash every time
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