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https://issues.apache.org/jira/browse/SOLR-2564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044283#comment-13044283
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Michael McCandless commented on SOLR-2564:
------------------------------------------

bq. We can choose to leave out the upper-casing. Solr users would then need 
make sure that parameter options are spelled correctly. Would that be allright?

It seems like "typically" the request param values must be lower-case?
(Which I think is good...).

So, maybe... we make an exception to enum casing (normally ALL CAPS)
and use lowercase for enums that corresopnd to valid values for
request params?  Then we can just do .valueOf() directly, and we get
the strong checking to catch mis-spellings.


> Integrating grouping module into Solr 4.0
> -----------------------------------------
>
>                 Key: SOLR-2564
>                 URL: https://issues.apache.org/jira/browse/SOLR-2564
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Martijn van Groningen
>            Assignee: Martijn van Groningen
>             Fix For: 4.0
>
>         Attachments: LUCENE-2564.patch, SOLR-2564.patch, SOLR-2564.patch, 
> SOLR-2564.patch
>
>
> Since work on grouping module is going well. I think it is time to wire this 
> up in Solr.
> Besides the current grouping features Solr provides, Solr will then also 
> support second pass caching and total count based on groups.

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