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https://issues.apache.org/jira/browse/SOLR-2898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180282#comment-13180282
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Steven Heijtel commented on SOLR-2898:
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I tried the patch, and it does work, thanks for that. Is there any expectations
when this feature will be released and/or when range queries are expected? At
least I've voted for it ;)
Something that took me ages to understand, I would like to share with others.
In contradiction to non grouped facets (sum of all facets) == (total of
products with that property) is not the case if it is grouped. See the
following objects:
object 1
- name: Phaser 4620a
- ppm: 62
- product_range: 6
object 2
- name: Phaser 4620i
- ppm: 65
- product_range: 6
object 3
- name: ML6512
- ppm: 62
- product_range: 7
If I ask to group it on "product_range", then the total amount of groups is 2,
but the facets for ppm are:
62 --> 2
65 --> 1
It completely makes sense, but in my case quite difficult to find out.
> Support grouped faceting
> ------------------------
>
> Key: SOLR-2898
> URL: https://issues.apache.org/jira/browse/SOLR-2898
> Project: Solr
> Issue Type: New Feature
> Reporter: Martijn van Groningen
> Attachments: SOLR-2898.patch
>
>
> Support grouped faceting. As described in LUCENE-3097 (matrix counts).
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