[jira] [Resolved] (HIVE-4186) NPE in ReduceSinkDeDuplication

["Ashutosh Chauhan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-4186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan resolved HIVE-4186.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.11.0

Committed to trunk. Thanks, Harish!
                
> NPE in ReduceSinkDeDuplication
> ------------------------------
>
>                 Key: HIVE-4186
>                 URL: https://issues.apache.org/jira/browse/HIVE-4186
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>             Fix For: 0.11.0
>
>         Attachments: HIVE-4186.1.patch.txt, HIVE-4186.2.patch.txt, HIVE-4186.3.patch.txt
>
>
> When you have a sequence of RedueSinks on constants you get this error:
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.hadoop.hive.ql.optimizer.ReduceSinkDeDuplication$ReduceSinkDeduplicateProcFactory$ReducerReducerProc.getPartitionAndKeyColumnMapping(ReduceSinkDeDuplication.java:416)
> {noformat}
> The e.g. to generate this si:
> {noformat}
> select p_name from (select p_name from part distribute by 1 sort by 1) p distribute by 1 sort by 1
> {noformat}
> Sorry for the contrived e.g., but this actually happens when we stack windowing clauses (see PTF-Windowing branch)

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