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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11761) DoubleWritable hash code for GroupBy is not properly generated
Date Tue, 08 Sep 2015 18:39:45 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu updated HIVE-11761:
----------------------------
    Attachment: HIVE-11761.patch

> DoubleWritable hash code for GroupBy is not properly generated
> --------------------------------------------------------------
>
>                 Key: HIVE-11761
>                 URL: https://issues.apache.org/jira/browse/HIVE-11761
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 1.2.0, 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>         Attachments: HIVE-11761.patch
>
>
> HIVE-11502 fixed the hashcode for LazyDouble. Additionally we should fix for DoubleWritable
as well due to HADOOP-12217 issue. In some cases such as {{select avg(t) from (select * from
over1k cross join src) t group by d;}} where d is double type, the data is actually in DoubleWritable,
not LazyDouble. Thus, we need to fix hashcode for LazyDouble as well as DoubleWritable.



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