[jira] Issue Comment Edited: (SOLR-236) Field collapsing

["Dave Redford (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12694851#action_12694851 ] 

Dave Redford edited comment on SOLR-236 at 4/1/09 5:56 PM:
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There is an issue with collapsed result ordering when querying with only the unique Id and score fields in the request.

eg: 
q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score&collapse.field=PrimaryId&collapse.max=1

gives wrong ordering (note: Id is our unique Id)

but adding a another field - even a bogus one - works.
q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score,bogus&collapse.field=PrimaryId&collapse.max=1

Also using an fq makes it work 
eg:
fq=Type:articles&q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score&collapse.field=PrimaryId&collapse.max=1

I'm using the latest Dmitry patch (25/mar/09) against 1.3.0.

Apart from that great so far...


      was (Author: dredford):
    There is an issue with collapsed result ordering when querying with only the unique Id and score fields in the request.

eg: 
q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score&collapse.field=PrimaryId&collapse.max=1

gives wrong order (note: Id is our unique Id)

but 
q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score,bogus&collapse.field=PrimaryId&collapse.max=1

Also using an fq make it work eg:

fq=Type:articles&q=ford&version=2.2&start=0&rows=10&indent=on&fl=Id,score&collapse.field=PrimaryId&collapse.max=1

I'm using the latest Dmitry patch (25/mar/09) against 1.3.0.

Apart from that great so far...

  
> 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-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."
> 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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