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https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12495334
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Ryan McKinley commented on SOLR-236:
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This looks good. Someone with better lucene chops should look at the
IndexSearcher getDocListAndSet part...
A few comments/questions about the interface:
If you apply all the example docs and hit:
http://localhost:8983/solr/select/?q=*:*&collapse=true
you get 500. We should use: params.required().get( "collapse.field" ) to have
a nicer error:
With:
http://localhost:8983/solr/select/?q=*:*&collapse=true&collapse.field=manu&collapse.max=1
the collapse info at the bottom says:
<lst name="collapse_counts">
<int name="has_more_results">3</int>
<int name="has_more_results">5</int>
<int name="has_more_results">9</int>
</lst>
what does that mean? How would you use it? How does it relate to the <result
docs?
> Field collapsing
> ----------------
>
> Key: SOLR-236
> URL: https://issues.apache.org/jira/browse/SOLR-236
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.2
> Reporter: Emmanuel Keller
> Attachments: collapse_field.patch, collapse_field.patch
>
>
> This patch include a new feature called "Field collapsing".
> "Used in order to collapse a group of results with similar value for a given
> field to a single entry in the result set. Site collapsing is a special case
> of this, where all results for a given web site is collapsed into one or two
> entries in the result set, typically with an associated "more documents from
> this site" link. See also Duplicate detection."
> http://www.fastsearch.com/glossary.aspx?m=48&amid=299
> The implementation add 3 new query parameters (SolrParams):
> "collapse" set to true to enable collapsing.
> "collapse.field" to choose the field used to group results
> "collapse.max" to select how many continuous results are allowed before
> collapsing
> TODO (in progress):
> - More documentation (on source code)
> - Test cases
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