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https://issues.apache.org/jira/browse/HIVE-11133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15979255#comment-15979255
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Sahil Takiar commented on HIVE-11133:
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[~lirui] this may be an existing bug in the user-level explain plan, or maybe
something that needs more documentation. From what I can tell, the section
labeled {{Vertex dependency in root stage}} basically iterates through all the
stages, and prints out the edges between the vertices. It doesn't seem to be
limited to the vertices of the root stage. The code that controls this is
{{DagJsonParser#print}} - specifically the section that contains
{{printer.println("Vertex dependency in root stage");}}
It does seem confusing to me that the section says {{root stage}} but iterates
through all the stages. I can file a separate JIRA for this.
> Support hive.explain.user for Spark
> -----------------------------------
>
> Key: HIVE-11133
> URL: https://issues.apache.org/jira/browse/HIVE-11133
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Mohit Sabharwal
> Assignee: Sahil Takiar
> Attachments: HIVE-11133.1.patch, HIVE-11133.2.patch,
> HIVE-11133.3.patch, HIVE-11133.4.patch, HIVE-11133.5.patch,
> HIVE-11133.6.patch, HIVE-11133.7.patch
>
>
> User friendly explain output ({{set hive.explain.user=true}}) should support
> Spark as well.
> Once supported, we should also enable related q-tests like {{explainuser_1.q}}
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