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https://issues.apache.org/jira/browse/HIVE-15955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15872985#comment-15872985
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Gunther Hagleitner commented on HIVE-15955:
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[~pxiong]. (1) Still doesn't answer the first question. Can you please make it
so that the operator id is always included? I *believe* you're saying it's
dependent on the user flag.
(2) If you turn on hive.auto.convert.sortmerge.join on tez, you can produce
operations that will result in multi operator reduce tasks. Basically if you
have join of two group bys (joined on the group by keys), tez can pack the 2
group bys and the join in the same vertex. Admittedly this is off by default,
but nevertheless it is a real possibility. That's why I'm suggesting that if it
is easy it might be more direct to connect operators.
> make explain formatted to dump JSONObject when user level explain is on
> -----------------------------------------------------------------------
>
> Key: HIVE-15955
> URL: https://issues.apache.org/jira/browse/HIVE-15955
> Project: Hive
> Issue Type: New Feature
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-15955.01.patch
>
>
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