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https://issues.apache.org/jira/browse/SOLR-5045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-5045:
---------------------------------
Attachment: SOLR-5045.patch
Added SumQParserPlugin which is a very simple *Aggregator* implementation. At
this point this class is only to show the mechanics of how an Aggregator works
and to test the framework. This class will be iterated on to make it more full
featured.
> Aggregating Collectors and AggregatorComponent
> ----------------------------------------------
>
> Key: SOLR-5045
> URL: https://issues.apache.org/jira/browse/SOLR-5045
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 5.0
> Reporter: Joel Bernstein
> Priority: Minor
> Fix For: 5.0
>
> Attachments: SOLR-5045.patch, SOLR-5045.patch
>
>
> This ticket provides a pluggable aggregation framework through the
> introduction of a new *Aggregator* interface and a new search component
> called the *AggregatorComponent*.
> The *Aggregator* interface extends the PostFilter interface providing methods
> that allow DelegatingCollectors to perform aggregation at collect time.
> Aggregators were designed to play nicely with the CollapsingQParserPlugin
> introduced in SOLR-5027.
> The *AggregatorComponent* manages the output and distributed merging of
> aggregate results.
> This ticket is an alternate design to SOLR-4465 which had the same basic idea
> but a very different implementation. This implementation resolves the caching
> issues in SOLR-4465 and combined with SOLR-5027 plays nicely with field
> collapsing. It is also much less intrusive on the core code as it's entirely
> implemented with plugins.
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