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From "Tony Murphy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4931) MAX/MIN aggregates yield incorrect results
Date Mon, 29 Jul 2013 17:15:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13722650#comment-13722650
] 

Tony Murphy commented on HIVE-4931:
-----------------------------------

Hey Edward. I'm working with Remus and others to stabilize vectorization, and this bug was
found as a result of that stabilization. I've just uploaded a new patch for HIVE-4794 which
contains the tests we've been using to stabilize, and which give us regression coverage for
this issue.
                
> MAX/MIN aggregates yield incorrect results
> ------------------------------------------
>
>                 Key: HIVE-4931
>                 URL: https://issues.apache.org/jira/browse/HIVE-4931
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>    Affects Versions: vectorization-branch
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>            Priority: Minor
>             Fix For: vectorization-branch
>
>         Attachments: HIVE-4931.1.patch
>
>
> With the dataset attached by Tony, running:
>  
> select max(ctinyint), max(csmallint), max(cint), max(cbigint), max(cfloat), max(cdouble)
from alltypes_orc;
>  
> this is the result in rowmode:
> OK
> 62      16379   1073737829      2146661184      62.0    16376.0
>  
> This is the result in vector mode:
> OK
> 1       16379   1071926788      -106115134      62.0    16361.0

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