Adding grouping to Solr 3x
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Key: SOLR-2524
URL: https://issues.apache.org/jira/browse/SOLR-2524
Project: Solr
Issue Type: New Feature
Affects Versions: 3.2
Reporter: Martijn van Groningen
Grouping was recently added to Lucene 3x. See LUCENE-1421 for more information.
I think it would be nice if we expose this functionality also to the Solr users
that are bound to a 3.x version.
The grouping feature added to Lucene is currently a subset of the functionality
that Solr 4.0-trunk offers. Mainly it doesn't support grouping by function /
query.
The work involved getting the grouping contrib to work on Solr 3x is
acceptable. I have it more or less running here. It supports the response
format and request parameters (expect: group.query and group.func) described in
the FieldCollapse page on the Solr wiki.
I think it would be great if this is included in the Solr 3.2 release. Many
people are using grouping as patch now and this would help them a lot. Any
thoughts?
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