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https://issues.apache.org/jira/browse/HIVE-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547605#comment-13547605
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Zhenxiao Luo commented on HIVE-3582:
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Hi Navis,
I did an non-committer review. Mostly Good. Leave comments at:
https://reviews.facebook.net/D6051
Also, maybe we could CC Namit in the Revision?
Thanks,
Zhenxiao
> NPE in union processing followed by lateral view followed by 2 group bys
> ------------------------------------------------------------------------
>
> Key: HIVE-3582
> URL: https://issues.apache.org/jira/browse/HIVE-3582
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Navis
> Attachments: HIVE-3582.D6051.1.patch
>
>
> EXPLAIN
> SELECT e.key, e.arr_ele, count(1) FROM (
> SELECT d.key as key, d.arr_ele as arr_ele, d.value as value, count(1) as
> cnt FROM (
> SELECT c.arr_ele as arr_ele, a.key as key, a.value as value FROM (
> SELECT key, value, array(1,2,3) as arr
> FROM src
> UNION ALL
>
> SELECT key, value, array(1,2,3) as arr
> FROM srcpart
> WHERE ds = '2008-04-08' and hr='12'
> ) a LATERAL VIEW EXPLODE(arr) c AS arr_ele
> ) d group by d.key, d.arr_ele, d.value
> ) e group by e.key, e.arr_ele;
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