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Joel Bernstein commented on SOLR-5045: -------------------------------------- You have the flexibility to calculate median, atleast on a single server. Not sure what the best approach to this would be. Distributed median may be harder. You'd have to build up distributions in a way that can be merged. Scripting is a very cool thing. I need to do some research though on SOLR-5005 and see if can be applied. > Pluggable Analytics > ------------------- > > 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. > 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} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org