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From "Hoss Man (JIRA)" <>
Subject [jira] [Updated] (SOLR-6349) LocalParams for enabling/disabling individual stats
Date Tue, 24 Feb 2015 23:01:05 GMT


Hoss Man updated SOLR-6349:
    Attachment: SOLR-6349.patch

bq. in general, i want to refactor this to replace it with commons-math's Combinations class
- i'll look into that tomorow

This patch replaces the confusing (to me) recursive method for testing all possible combinations
of params with simple iteration using commons-math's Combinations iterator.

also new in this patch: tweaks to DistributedFacetPivotSmallAdvancedTest to assert that when
stats hang off pivots the local params correctly control which stats are returned ... even
when refinement happens (this test already forces that condition).

> LocalParams for enabling/disabling individual stats
> ---------------------------------------------------
>                 Key: SOLR-6349
>                 URL:
>             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-xu.patch, SOLR-6349-xu.patch, SOLR-6349.patch,
SOLR-6349.patch, SOLR-6349.patch, SOLR-6349.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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