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https://issues.apache.org/jira/browse/SOLR-11706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16981752#comment-16981752
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Munendra S N commented on SOLR-11706:
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[^SOLR-11706.patch]
This patch contains aggregation support on multi-valued fields.
These are the following aggregations included here: min, max, avg, min, max,
sum, sumsq, stddev, variance.
{{percentile}} doesn't yet have support for multi-valued fields (Probably will
handle in separate issue)
I have included {{TestJsonFacets}} tests shared above but haven't included
StatsComponentTest changes. This is because of following reasons:
* min/max for numeric fields in Stats is always double but in JSON facets,
fieldType is respected
* Value type varies for some aggregation. For example, countDistinct is long
whereas unique aggregation value is int/long based on single-shard or
multi-shard respectively SOLR-11775
* corrected vs uncorrected stddev SOLR-11725
SOLR-12559 is not resolved but I suppose that can be taken up separately/in
next phase
[~hossman] [[email protected]] [~mkhl] could you please review this?
Let me know if Github PR is need
> JSON FacetModule can't compute stats (min,max,etc...) on multivalued fields
> ---------------------------------------------------------------------------
>
> Key: SOLR-11706
> URL: https://issues.apache.org/jira/browse/SOLR-11706
> Project: Solr
> Issue Type: Bug
> Components: Facet Module
> Reporter: Chris M. Hostetter
> Priority: Major
> Attachments: SOLR-11706.patch, SOLR-11706.patch
>
>
> While trying to write some tests demonstrating equivalences between the
> StatsComponent and the JSON FacetModule i discovered that the FacetModules
> stat functions (min, max, etc...) don't seem to work on multivalued fields.
> Based on the stack traces, i gather the problem is because the FacetModule
> seems to rely exclusively on using the "Function" parsers to get a value
> source -- apparently w/o any other method of accumulating numeric stats from
> multivalued (numeric) DocValues?
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