Field collapsing

• Key: SOLR-237
• Type: New Feature
• Status: Closed
• Resolution: Duplicate
• Priority: Major
• Assignee: Unassigned
• Reporter: Emmanuel Keller
• Component/s: search
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.0

Description

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

Comments

[Ryan McKinley]

Thanks for posting this Emmanuel!

I'm having trouble applying the patch... I get an error that says something like "this patch seems outdated!"

Did you build it with a recent svn checkout?

thanks
ryan

[Emmanuel Keller]

Ryan,

I used the following svn path:http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.1.0
Last changed revision: 489774

Shoud I use this one ?
http://svn.apache.org/repos/asf/lucene/solr/branches/branch-1.1
Last changed revision: 488066

Thanks for you reply
Emmanuel.

[Emmanuel Keller]

Patch from http://svn.apache.org/repos/asf/lucene/solr/branches/branch-1.1

[Ryan McKinley]

can you make a patch off:
http://svn.apache.org/repos/asf/lucene/solr/trunk/

thanks

[Emmanuel Keller]

Linking "Field collapsing" for current trunk & for release 1.1.0

[Emmanuel Keller]

I provided two patch.

The first was made off current trunk (see solr-236). And this one (solr-237) for release 1.1.

Is that correct ? Or did I miss something ?

[Ryan McKinley]

Looks like I missed something... yes, SOLR-236 applies to trunk fine. I didn't notice it because I was looking at this issue.

Since any further development/integration should happen on SOLR-236, I think we should close this issue and mark it as a duplicate.

I'll put my substantive comments on SOLR-236...

[Emmanuel Keller]

Further development happen on solr-236