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https://issues.apache.org/jira/browse/HIVE-8793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14207983#comment-14207983
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Rui Li commented on HIVE-8793:
------------------------------
Now the result seems better.
Another thing I want to clarify is that the split spark work is done in a BFS
manner. So if we have a work graph like:
{noformat}
Map1 -> Reducer2 -> Reducer3
|
-> Reducer4
{noformat}
It will be split into something like:
{noformat}
Map1 -> Reducer5 -> Reducer3
|
-> Reducer6 -> Reducer4
{noformat}
And Map1 still has two children.
Is this OK?
> 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: Sub-task
> Components: Spark
> Affects Versions: spark-branch
> Reporter: Chao
> Assignee: Rui Li
> Attachments: HIVE-8793.1-spark.patch, HIVE-8793.2-spark.patch
>
>
> 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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