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From "Joel Bernstein (JIRA)" <>
Subject [jira] [Resolved] (SOLR-5045) Pluggable Analytics
Date Fri, 13 Jun 2014 01:37:02 GMT


Joel Bernstein resolved SOLR-5045.

    Resolution: Incomplete

Closing this issue as it is superseded by SOLR-6150

> Pluggable Analytics
> -------------------
>                 Key: SOLR-5045
>                 URL:
>             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.
> Initial Syntax for the sample SumQParserPlugin Aggregator:
> ../select?q=\*:\*&wt=xml&indent=true&fq=\{!sum field=popularity id=mysum\}&aggregate=true
> *fq=\{!sum field=popularity id=mysum\}* - Calls the SumQParserPlugin telling it to sum
the field popularity.
> *aggregate=true*  - turns on the AggregatorComponent
> The output contains a block that looks like this:
> {code:xml}
> <lst name="aggregates">
>   <lst name="mysum">
>     <long name="sum">85</long>
>   </lst>
> </lst>
> {code}

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