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From Domingo Gómez García (JIRA) <>
Subject [jira] Issue Comment Edited: (SOLR-236) Field collapsing
Date Wed, 29 Apr 2009 11:24:31 GMT


Domingo Gómez García edited comment on SOLR-236 at 4/29/09 4:23 AM:

I made checkout on svn release-1.3.0 and applied SOLR-236_collapsing.patch. I have upgraded
from 1.2 to 1.3.0 (patched) and I get a lot of permgen exceptions. Specially in calls from

      was (Author: dgomezca):
    I made checkout on svn release-1.3.0 and applied SOLR-236_collapsing.patch. After the
task "generate-maven-artifacts" I use the resulting distribution and made  http://localhost:8983/solr/select/?q=*:*&collapse.field=cat&collapse.max=1&collapse.type=normal
(from wiki). No collapsed results. It seems to be ignoring CollapseComponent or something
like that.
Do I have to configure something else?
Could anyone bring to me a working version/patch?

Thank you.
> Field collapsing
> ----------------
>                 Key: SOLR-236
>                 URL:
>             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-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
> 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."
> 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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