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https://issues.apache.org/jira/browse/HIVE-13282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15298795#comment-15298795
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Vikram Dixit K commented on HIVE-13282:
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[~mmccline] Can you try the patch I have attached above? I think that is how I
was able to repro the issue. I think with the patch attached here, it produces
a result sometimes but that is wrong (if you switch around the tables, it may
even throw an exception).
> 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
> Attachments: 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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