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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3582) NPE in union processing followed by lateral view followed by 2 group bys
Date Tue, 15 Jan 2013 11:28:14 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13553686#comment-13553686
] 

Phabricator commented on HIVE-3582:
-----------------------------------

navis has commented on the revision "HIVE-3582 [jira] NPE in union processing followed by
lateral view followed by 2 group bys".

INLINE COMMENTS
  ql/src/java/org/apache/hadoop/hive/ql/lib/Utils.java:54 ok.
  ql/src/java/org/apache/hadoop/hive/ql/optimizer/MapJoinFactory.java:360 I think it's same
meaning. I'll add clarifying round brackets.
  ql/src/test/queries/clientpositive/union_lateralview2.q:2 ok.

REVISION DETAIL
  https://reviews.facebook.net/D6051

To: JIRA, navis
Cc: 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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