[jira] [Commented] (DRILL-2209) Save on CPU cycles by adding Project with column that has hash calculated

["Venki Korukanti (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14352604#comment-14352604 ] 

Venki Korukanti commented on DRILL-2209:
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New patch LGTM, +1.

One suggestion discussed offline: currently we are inserting project only when MUX is enabled. I think it is a good idea to enable it when MUX and/or DEMUX is enabled. We can address this in a separate JIRA as the demux is disabled by default.

> 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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