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https://issues.apache.org/jira/browse/SOLR-5302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13786206#comment-13786206
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Robert Muir commented on SOLR-5302:
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Can we remove all the class.equals/isassignablefrom stuff?
we should instead use proper fieldtype methods ... only use instanceof when
absolutely necessary, and only instanceof, and please open an issue when it
because it means solr is broken. using instanceof, isassignablefrom,
class.equals, etc completely breaks solr's pluggability in increasingly bogus
ways.
> Analytics Component
> -------------------
>
> Key: SOLR-5302
> URL: https://issues.apache.org/jira/browse/SOLR-5302
> Project: Solr
> Issue Type: New Feature
> Reporter: Steven Bower
> Attachments: Search Analytics Component.pdf,
> solr_analytics-2013.10.04.patch, Statistical Expressions.pdf
>
>
> This ticket is to track a "replacement" for the StatsComponent. The
> AnalyticsComponent supports the following features:
> * All functionality of StatsComponent (SOLR-4499)
> * Field Faceting (SOLR-3435)
> ** Support for limit
> ** Sorting (bucket name or any stat in the bucket
> ** Support for offset
> * Range Faceting
> ** Supports all options of standard range faceting
> * Query Faceting (SOLR-2925)
> * Ability to use overall/field facet statistics as input to range/query
> faceting (ie calc min/max date and then facet over that range
> * Support for more complex aggregate/mapping operations (SOLR-1622)
> ** Aggregations: min, max, sum, sum-of-square, count, missing, stddev, mean,
> median, percentiles
> ** Operations: negation, abs, add, multiply, divide, power, log, date math,
> string reversal, string concat
> ** Easily pluggable framework to add additional operations
> * New / cleaner output format
> Outstanding Issues:
> * Multi-value field support for stats (supported for faceting)
> * Multi-shard support (may not be possible for some operations, eg median)
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