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Posted to issues@spark.apache.org by "Cheng Su (Jira)" <ji...@apache.org> on 2021/03/11 02:42:00 UTC
[jira] [Updated] (SPARK-34533) Eliminate LEFT ANTI join to empty
relation in AQE
[ https://issues.apache.org/jira/browse/SPARK-34533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cheng Su updated SPARK-34533:
-----------------------------
Parent: SPARK-34706
Issue Type: Sub-task (was: Improvement)
> Eliminate LEFT ANTI join to empty relation in AQE
> -------------------------------------------------
>
> Key: SPARK-34533
> URL: https://issues.apache.org/jira/browse/SPARK-34533
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Cheng Su
> Assignee: Cheng Su
> Priority: Minor
> Fix For: 3.2.0
>
>
> I discovered from review discussion - [https://github.com/apache/spark/pull/31630#discussion_r581774000] , that we can eliminate LEFT ANTI join (with no join condition) to empty relation, if the right side is known to be non-empty. So with AQE, this is doable similar to [https://github.com/apache/spark/pull/29484] .
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