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https://issues.apache.org/jira/browse/SOLR-2207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12987641#action_12987641
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Tanguy Moal commented on SOLR-2207:
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Hello Yonik,
First, thank you for this patch, that is interesting.
However I am not interested in paginating within a group, but in knowing where
will the overall pagination stop.
I don't know if I'm doing things right, but here is my issue :
I have some kind of a signature that I store in a field and then use it to
collapse search results within groups. Some kind of duplicate content filtering.
I can't find a clean way to obtain the total number of groups for a given
query. The only way to do that from my understanding, is to ask solr for
faceting on the field holding each document's signature, with facet.limit = -1,
and then count the number of distinct signature for the given query. I finally
use very simple arithmetic (matches - count(signature facets)) to know the
total number of groups .
Using this, I could finally know where to stop pagination of my results set.
Obviously, that is very suboptimal.
There *must* be a cleaner way to do so, right ?
Any help appreciated =D
> Add paging capabilities to Result Grouping functionality
> --------------------------------------------------------
>
> Key: SOLR-2207
> URL: https://issues.apache.org/jira/browse/SOLR-2207
> Project: Solr
> Issue Type: Improvement
> Reporter: Grant Ingersoll
> Assignee: Yonik Seeley
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SOLR-2207.patch
>
>
> Would be great to have the following:
> # Paging of docs within a group via start and offset parameters such that one
> can drill down into a group
> # While I know we can't return a total count of all groups, it would be nice
> to know if there are more groups. This could simply be done by asking for 1
> more group than requested by the user. If that group is non-empty, then set
> a flag indicating there are more groups. Then, start and offset could also
> be applied to allow paging down the groups. We should also think about how
> we can optimize this so that we can page very deep into the results without
> needing to increase the PQ size.
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