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From "Yuliya Feldman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2209) Save on CPU cycles by adding Project with column that has hash calculated
Date Wed, 18 Feb 2015 19:25:11 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326423#comment-14326423
] 

Yuliya Feldman commented on DRILL-2209:
---------------------------------------

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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