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https://issues.apache.org/jira/browse/HIVE-11133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15977939#comment-15977939
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Rui Li commented on HIVE-11133:
-------------------------------
Another example of non-root stage having vertex dependency is conditional task.
Suppose you disable {{hive.auto.convert.join}} and enable
{{hive.optimize.skewjoin}}. The following query will generate conditional task
to join skewed data:
{code}
select A.key from A join B on A.key=B.key group by A.key;
{code}
> 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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