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https://issues.apache.org/jira/browse/HIVE-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13558566#comment-13558566
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Namit Jain commented on HIVE-3582:
----------------------------------
Looks perfect.
I had a question: do you think it would be possible to remove currUnionOp from
the context
completely ? That will simplify things a lot.
I am +1 on this patch as is, you can remove currUnionOp from the context in a
follow-up if
it seems possible.
Ashutosh, I am assuming you are committing this patch, since you already ran
the tests.
> 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, HIVE-3582.D6051.2.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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