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Posted to issues@spark.apache.org by "Erik Krogen (Jira)" <ji...@apache.org> on 2020/09/21 15:37:00 UTC
[jira] [Commented] (SPARK-32944) Avoid push down Filter through
Project when it will hurts performance
[ https://issues.apache.org/jira/browse/SPARK-32944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17199456#comment-17199456 ]
Erik Krogen commented on SPARK-32944:
-------------------------------------
[~viirya] I'm curious if you can provide some examples of such situations and how you propose to detect them? Would this be an automated detection or a flag supplied to manually disable the pushdown?
> Avoid push down Filter through Project when it will hurts performance
> ---------------------------------------------------------------------
>
> Key: SPARK-32944
> URL: https://issues.apache.org/jira/browse/SPARK-32944
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: L. C. Hsieh
> Assignee: L. C. Hsieh
> Priority: Major
>
> In some cases, we should not push down Filter through Project because it hurts performance instead of improving.
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