Field collapsing
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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
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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