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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Solr [Streaming Expressions/Parallel SQL Interface] Not supporting Multi Value using mapReduce option
Date Thu, 08 Sep 2016 15:05:15 GMT
The basic problem is "what does sorting on a multi-valued field mean"? If
you have a numeric field with values 1, 5, 7 how should sorting rank that
doc? Use 1? 7? the average? Median? Sum?....

There is some limited ability in the rest of Solr to sort by min/max but that's
it.

Best,
Erick

On Thu, Sep 8, 2016 at 4:57 AM, Joel Bernstein <joelsolr@gmail.com> wrote:
> Yes, sorting on multi-valued value fields isn't supported with Streaming
> Expressions.
>
> Multi-value fields can be exported but not used for sorting.
>
> There currently isn't a plan to add sorting on multi-value fields, but if
> other areas in Solr are supporting this perhaps we could use the same
> technique.
>
> Joel Bernstein
> http://joelsolr.blogspot.com/
>
> On Thu, Sep 8, 2016 at 2:24 AM, Praveen Babu <subramani.new@gmail.com>
> wrote:
>
>> Hi ,
>>
>>
>> Does parallel sql support Multi valued field?
>>
>> I am unable to group by on Multi valued field  when I choose
>>
>> /sql?aggregationMode=map_reduce
>>
>> "can not sort on multivalued field"
>>
>>
>>
>> input:
>>
>> {
>>
>> id: 1
>>
>> field1:[1,2,3],
>>
>> app.name:[watsapp,facebook,... ]
>>
>> }
>>
>> {
>>
>> id: 2
>>
>> field1:[1,2,3],
>>
>> app.name:[watsapp,facebook,... ]
>>
>> }
>>
>>
>>
>> Expected result :
>>
>> watsapp: 2
>>
>> facebook : 2
>>
>>
>> I have 2 TB data . I wanted to execute in aggmode=map_reduce. Any
>> suggestion?
>>
>>
>>
>> Need your valuable suggestion.
>>
>>
>>
>> Regards,
>> S.Praveen
>> Technical Architech
>> LinkedIn:
>> https://www.linkedin.com/in/praveen-babu-73232889?trk=nav_
>> responsive_tab_profile
>>

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