Re: Why no two aggregations can have different DISTINCT columns ?

[Mafish Liu <ma...@gmail.com>]

Patch uploaded.
Please have a review at https://issues.apache.org/jira/browse/HIVE-474

2010/2/26 Mafish Liu <ma...@gmail.com>:
> 2010/2/25 Todd Lipcon <to...@cloudera.com>:
>> I think you can use this existing JIRA:
>> http://issues.apache.org/jira/browse/HIVE-474
> I'm using this JIRA. Thanks.
>
>>
>> Thanks
>> -Todd
>> On Thu, Feb 25, 2010 at 2:11 AM, Mafish Liu <ma...@gmail.com> wrote:
>>>
>>> 2010/2/25 Zheng Shao <zs...@gmail.com>:
>>> > Yes definitely. Do you want to open a JIRA and post a patch?
>>> > Please link the new JIRA to the other 2 JIRA that was mentioned in the
>>> > same email thread.
>>> I'll open a jira.
>>> And the patch will be post after code and documents  being arranged.
>>>
>>> > Zheng
>>> >
>>> > On Thu, Feb 25, 2010 at 1:16 AM, Mafish Liu <ma...@gmail.com> wrote:
>>> >> Hive does not support multi-distinct in one query.
>>> >>
>>> >> We have implemented multi-distinct based on hive 0.4.2rc to our demand.
>>> >> We don't know that if Hive is intresting in this feature.
>>> >>
>>> >> 2010/2/25 Jeff Zhang <zj...@gmail.com>:
>>> >>>
>>> >>> Hi all,
>>> >>>
>>> >>> I read the tutorial of Hive, and it says that "no two aggregations can
>>> >>> have
>>> >>> different DISTINCT columns". Could anyone tell what is the reason ?
>>> >>> Does the
>>> >>> following Distinct will been translate to map-reduce job or just do it
>>> >>> locally ?
>>> >>>
>>> >>>     INSERT OVERWRITE TABLE pv_gender_agg
>>> >>>     SELECT pv_users.gender, count(DISTINCT pv_users.userid),
>>> >>> count(DISTINCT
>>> >>> pv_users.ip)
>>> >>>     FROM pv_users
>>> >>>     GROUP BY pv_users.gender;
>>> >>>
>>> >>> --
>>> >>> Best Regards
>>> >>>
>>> >>> Jeff Zhang
>>> >>>
>>> >>
>>> >>
>>> >>
>>> >> --
>>> >> Mafish@gmail.com
>>> >>
>>> >
>>> >
>>> >
>>> > --
>>> > Yours,
>>> > Zheng
>>> >
>>>
>>>
>>>
>>> --
>>> Mafish@gmail.com
>>
>>
>
>
>
> --
> Mafish@gmail.com
>



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