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From "Yuriy Akopov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-236) Field collapsing
Date Thu, 31 Mar 2011 08:25:06 GMT

    [ https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13013878#comment-13013878
] 

Yuriy Akopov commented on SOLR-236:
-----------------------------------

Another question:

The patched version of .war starts and works as expected if I place the following simple instruction
in solrconfig.xml:

	<searchComponent name="collapse" class="org.apache.solr.handler.component.CollapseComponent">
	</searchComponent>

But if I add additional factories like it is advised by the sample config, it produces an
error when searching with collapsing turned on:

	<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 name="groupAggregatedData" 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>
	</searchComponent>

So far it does what I expect from it without additional factories mentioned, but still it
bothers me that it fails when they're listed. Maybe I placed the libraries in a wrong place?

> 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: Next
>
>         Attachments: DocSetScoreCollector.java, NonAdjacentDocumentCollapser.java, NonAdjacentDocumentCollapserTest.java,
SOLR-236-1_4_1-NPEfix.patch, SOLR-236-1_4_1-paging-totals-working.patch, SOLR-236-1_4_1.patch,
SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch,
SOLR-236-branch_3x.patch, SOLR-236-distinctFacet.patch, SOLR-236-trunk.patch, SOLR-236-trunk.patch,
SOLR-236-trunk.patch, SOLR-236-trunk.patch, SOLR-236-trunk.patch, SOLR-236.patch, SOLR-236.patch,
SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch,
SOLR-236_collapsing.patch, SOLR-236_collapsing.patch, 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.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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