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From "Shalin Shekhar Mangar (JIRA)" <j...@apache.org>
Subject [jira] Updated: (SOLR-236) Field collapsing
Date Fri, 18 Dec 2009 10:17:18 GMT

     [ https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shalin Shekhar Mangar updated SOLR-236:
---------------------------------------

    Attachment: SOLR-236.patch

Changes:

# Modified configuration as Noble suggested. The AggregateCollapseCollectorFactory is now
PluginInfoInitialized instead of NamedListInitialzed and functions are plugins. The "name"
attribute is removed from "collapseCollectorFactory" since it is no longer necessary:
{code:xml}
<searchComponent name="collapse" class="org.apache.solr.handler.component.CollapseComponent">
    <collapseCollectorFactory class="solr.fieldcollapse.collector.DocumentGroupCountCollapseCollectorFactory"
/>

    <collapseCollectorFactory class="solr.fieldcollapse.collector.FieldValueCountCollapseCollectorFactory"
/>

    <collapseCollectorFactory class="solr.fieldcollapse.collector.DocumentFieldsCollapseCollectorFactory"
/>

    <collapseCollectorFactory class="org.apache.solr.search.fieldcollapse.collector.AggregateCollapseCollectorFactory">
      <function name="sum" class="org.apache.solr.search.fieldcollapse.collector.aggregate.SumFunction"/>
      <function name="avg" class="org.apache.solr.search.fieldcollapse.collector.aggregate.AverageFunction"/>
      <function name="min" class="org.apache.solr.search.fieldcollapse.collector.aggregate.MinFunction"/>
      <function name="max" class="org.apache.solr.search.fieldcollapse.collector.aggregate.MaxFunction"/>
    </collapseCollectorFactory>

  	<fieldCollapseCache
      class="solr.FastLRUCache"
      size="512"
      initialSize="512"
      autowarmCount="128"/>
    
  </searchComponent>
{code}
# Changed DistributedFieldCollapsingIntegrationTest to use BaseDistributedSearchTestCase.
This fails right now. I believe there is a bug with the distributed implementation. The distributed
version returns one extra group when compared to the non-distributed version. I've put an
@Ignore annotation on that test.

We can consider creating the functions through a factory so that they can accept initialization
parameters. The schema-fieldcollapse.xml and solrconfig-fieldcollapse.xml are no longer necessary
and can be removed.

Next steps:
# Let us open issues for all the modifications needed in Solr to support this feature. That
will help us break down this patch into more manageable (and easily reviewable) pieces. I
guess we need one for providing custom Collectors for SolrIndexSearcher methods. Any others?
# The response format is not very clear in the wiki. We should add more examples and explain
the format.

> 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
>            Assignee: Shalin Shekhar Mangar
>             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-5.patch, field-collapse-5.patch, field-collapse-5.patch,
field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.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, quasidistributed.additional.patch,
SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch,
SOLR-236.patch, SOLR-236.patch, SOLR-236.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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