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https://issues.apache.org/jira/browse/SOLR-237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Keller updated SOLR-237:
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Attachment: field_collapsing-1.1.patch
Patch from http://svn.apache.org/repos/asf/lucene/solr/branches/branch-1.1
Field collapsing
Key: SOLR-237
URL: https://issues.apache.org/jira/browse/SOLR-237
Project: Solr
Issue Type: New Feature
Components: search
Affects Versions: 1.1.0
Reporter: Emmanuel Keller
Attachments: field_collapsing-1.1.patch, field_collapsing_1.1.0.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=48amid=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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