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https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716364#action_12716364
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Thomas Traeger commented on SOLR-236:
-------------------------------------
ron, your approach should work, I just verified it on my Ubuntu 9.04 box. Here
are my steps to a working example installation of solr 1.3.0 with collapsing
enabled:
{noformat}
java -version
> java version "1.6.0_13"
> Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
> Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02, mixed mode)
wget http://www.apache.org/dist/lucene/solr/1.3.0/apache-solr-1.3.0.tgz
tar xvzf apache-solr-1.3.0.tgz
wget
http://issues.apache.org/jira/secure/attachment/12407410/SOLR-236_collapsing.patch
cd apache-solr-1.3.0/
patch -p0 <../SOLR-236_collapsing.patch
mv src/common/org/apache/solr/common/params/CollapseParams.java
src/java/org/apache/solr/common/params/
ant example
cd example/
vi solr/conf/solrconfig.xml
{noformat}
add the collapse component class definition:
{noformat}
<searchComponent name="collapse"
class="org.apache.solr.handler.component.CollapseComponent" />
{noformat}
set the components in the standard requestHandler:
{noformat}
<arr name="components">
<str>collapse</str>
</arr>
{noformat}
start jetty
{noformat}
java -jar start.jar
{noformat}
add example docs
{noformat}
cd example/exampledocs
sh post.sh *.xml
{noformat}
and open http://localhost:8983/solr/select/?q=*:*&collapse.field=cat in your
browser.
> Field collapsing
> ----------------
>
> Key: SOLR-236
> URL: https://issues.apache.org/jira/browse/SOLR-236
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.3
> Reporter: Emmanuel Keller
> Fix For: 1.5
>
> Attachments: collapsing-patch-to-1.3.0-dieter.patch,
> collapsing-patch-to-1.3.0-ivan.patch, collapsing-patch-to-1.3.0-ivan_2.patch,
> collapsing-patch-to-1.3.0-ivan_3.patch, field-collapse-solr-236-2.patch,
> field-collapse-solr-236.patch, field-collapsing-extended-592129.patch,
> field_collapsing_1.1.0.patch, field_collapsing_1.3.patch,
> field_collapsing_dsteigerwald.diff, field_collapsing_dsteigerwald.diff,
> field_collapsing_dsteigerwald.diff, SOLR-236-FieldCollapsing.patch,
> SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch,
> solr-236.patch, SOLR-236_collapsing.patch, SOLR-236_collapsing.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.field" to choose the field used to group results
> "collapse.type" normal (default value) or adjacent
> "collapse.max" to select how many continuous results are allowed before
> collapsing
> TODO (in progress):
> - More documentation (on source code)
> - Test cases
> Two patches:
> - "field_collapsing.patch" for current development version
> - "field_collapsing_1.1.0.patch" for Solr-1.1.0
> P.S.: Feedback and misspelling correction are welcome ;-)
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