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From "Thomas Traeger (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-236) Field collapsing
Date Sun, 13 Sep 2009 21:18:57 GMT

    [ https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12754764#action_12754764
] 

Thomas Traeger commented on SOLR-236:
-------------------------------------

I found the problem with my real world data and reproduced it with the solr example schema
and data. In the solr example popularity is of type "int" and inStock is "boolean". I made
some more tests and could reproduce other fieldtypes too, here some examples using the field
manu_exact (string):

[http://localhost:8983/solr/select/?q=*:*&sort=manu_exact%20asc&fl=id&collapse.field=inStock&collapse.includeCollapsedDocs=true]
-> as in the previous example document id:VDBDB1A16 is in result and collapsedDocs

[http://localhost:8983/solr/select/?q=*:*&sort=manu_exact%20desc&fl=id&collapse.field=inStock&collapse.includeCollapsedDocs=true]
-> document id:VA902B is in result and collapsedDocs

[http://localhost:8983/solr/select/?q=*:*&sort=popularity%20desc&fl=id&collapse.field=manu_exact&collapse.includeCollapsedDocs=true]
-> document id:VS1GB400C3 is in result and collapsedDocs



> 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-3.patch,
field-collapse-4-with-solrj.patch, field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch,
field-collapse-5.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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