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https://issues.apache.org/jira/browse/HIVE-8793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14204349#comment-14204349
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Xuefu Zhang commented on HIVE-8793:
-----------------------------------

[~csun], I didn't mean doing HIVE-8118 before map join optimization, as my text 
above stated. We only  move the part of splitting SparkWork forward. Yes, we 
can make that part of processing as a processor (either logical or physical). 
Regardless, I think this is a matter of refactoring.

Could you please move on to HIVE-8776 as it seems blocking the rest of map join 
work? 

> Make sure multi-insert works with map join [Spark Branch]
> ---------------------------------------------------------
>
>                 Key: HIVE-8793
>                 URL: https://issues.apache.org/jira/browse/HIVE-8793
>             Project: Hive
>          Issue Type: Task
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Chao
>
> Currently, HIVE-8622 is implemented based on an assumption, that for a map 
> join query, a BaseWork would not have multiple children. By testing through 
> subquery_multiinsert.q did reveal that's the case. But, we need to 
> investigate on this, and make sure this won't happen in general.



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