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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/03/17 22:00:00 UTC
[jira] [Commented] (SPARK-34781) Eliminate LEFT SEMI/ANTI join to
its left child side with AQE
[ https://issues.apache.org/jira/browse/SPARK-34781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17303748#comment-17303748 ]
Apache Spark commented on SPARK-34781:
--------------------------------------
User 'c21' has created a pull request for this issue:
https://github.com/apache/spark/pull/31873
> Eliminate LEFT SEMI/ANTI join to its left child side with AQE
> -------------------------------------------------------------
>
> Key: SPARK-34781
> URL: https://issues.apache.org/jira/browse/SPARK-34781
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Cheng Su
> Priority: Trivial
>
> In `EliminateJoinToEmptyRelation.scala`, we can extend it to cover more cases for LEFT SEMI and LEFT ANI joins:
> # Join is left semi join, join right side is non-empty and condition is empty. Eliminate join to its left side.
> # Join is left anti join, join right side is empty. Eliminate join to its left side.
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