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From Morten Lied Johansen <>
Subject Re: Stats per group with StatsComponent?
Date Wed, 30 Nov 2011 14:25:13 GMT
On 30. nov. 2011 14:58, Martijn v Groningen wrote:

> With the StatsComponent this isn't possible at the moment. The
> StatsComponent will give you the min / max of field for the whole
> query result.
> If you want the min / max value per group you'll need to do some
> coding. The grouping logic is executed inside Lucene collectors
> located in the grouping module. You'll need to create a new second
> pass collector that computes the min / max for the top N groups. This
> collector then needs to be wired up in Solr. The
> AbstractSecondPassGroupingCollector is something you can take a look
> at. It collects the top documents for the top N groups.

Thank you for your reply. We'll have a look at this and see if we can 
get something going this week.

> You don't need to have a patch to open an issue. Just open an issue
> with a good description and maybe some implementation details.

I have created an issue, SOLR-2931. Let me know if I should add some 
more details to it. We will update it and follow any discussions as we work.

We all live in a yellow subroutine.

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