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https://issues.apache.org/jira/browse/HIVE-13282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832388#comment-15832388
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Matt McCline commented on HIVE-13282:
-------------------------------------
Vikram had worked on it. I took over. There were 2 issues I recall. One was
the index out of bounds but when that was fixed another issue wrong results
appeared. It had to do with handling of operator close when there are multiple
parents. I wasn't able to work that one very well.
> GroupBy and select operator encounter ArrayIndexOutOfBoundsException
> --------------------------------------------------------------------
>
> Key: HIVE-13282
> URL: https://issues.apache.org/jira/browse/HIVE-13282
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 1.2.1, 2.0.0, 2.1.0
> Reporter: Vikram Dixit K
> Assignee: Matt McCline
> Priority: Blocker
> Attachments: HIVE-13282.01.patch, smb_fail_issue.patch,
> smb_groupby.q, smb_groupby.q.out
>
>
> The group by and select operators run into the ArrayIndexOutOfBoundsException
> when they incorrectly initialize themselves with tag 0 but the incoming tag
> id is different.
> {code}
> select count(*) from
> (select rt1.id from
> (select t1.key as id, t1.value as od from tab t1 group by key, value) rt1) vt1
> join
> (select rt2.id from
> (select t2.key as id, t2.value as od from tab_part t2 group by key, value)
> rt2) vt2
> where vt1.id=vt2.id;
> {code}
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