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https://issues.apache.org/jira/browse/SOLR-6349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xu Zhang updated SOLR-6349:
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Attachment: SOLR-6349-xu.patch
Made some adjustments based on Hoss's comments.
1. Only use EnumSet now.
2. Move calcDistinct into Enum.
But the question is, do we consider calcDistinct is a local parameter like
min/max, or it should be the top-level parameter. (Which keeps the existing
behavior for things like stats.field=foo&stats.calcDistinct=true)
3. Support distributed request, add faking test.
4. Remove static dependsOn(Stat) methods, use Enum property instead.
> LocalParams for enabling/disabling individual stats
> ---------------------------------------------------
>
> Key: SOLR-6349
> URL: https://issues.apache.org/jira/browse/SOLR-6349
> Project: Solr
> Issue Type: Sub-task
> Reporter: Hoss Man
> Attachments: SOLR-6349-tflobbe.patch, SOLR-6349-tflobbe.patch,
> SOLR-6349-tflobbe.patch, SOLR-6349-xu.patch, SOLR-6349-xu.patch,
> SOLR-6349___bad_idea_broken.patch
>
>
> Stats component currently computes all stats (except for one) every time
> because they are relatively cheap, and in some cases dependent on eachother
> for distrib computation -- but if we start layering stats on other things it
> becomes unnecessarily expensive to compute all the stats when they just want
> the "sum" (and it will definitely become excessively verbose in the
> responses).
> The plan here is to use local params to make this configurable. All of the
> existing stat options could be modeled as a simple boolean param, but future
> params (like percentiles) might take in a more complex param value...
> Example:
> {noformat}
> stats.field={!min=true max=true percentiles='99,99.999'}price
> stats.field={!mean=true}weight
> {noformat}
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