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https://issues.apache.org/jira/browse/SPARK-36612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17727779#comment-17727779
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Snoot.io commented on SPARK-36612:
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User 'szehon-ho' has created a pull request for this issue:
https://github.com/apache/spark/pull/41398
> Support left outer join build left or right outer join build right in
> shuffled hash join
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-36612
> URL: https://issues.apache.org/jira/browse/SPARK-36612
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: mcdull_zhang
> Priority: Major
>
> Currently spark sql does not support build left side when left outer join (or
> build right side when right outer join).
> However, in our production environment, there are a large number of scenarios
> where small tables are left join large tables, and many times, large tables
> have data skew (currently AQE can't handle this kind of skew).
> Inspired by SPARK-32399, we can use similar ideas to realize left outer join
> build left.
> I think this treatment is very meaningful, but I don’t know how members
> consider this matter?
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