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https://issues.apache.org/jira/browse/SOLR-5743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049432#comment-15049432
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Mikhail Khludnev commented on SOLR-5743:
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Colleagues! I need your advice.
This patch disables query result caching (that requires to make
{{NO_CHECK_QCACHE}} public), enforce execution query every time (of course only
if params are present).
It calculates facets ongoing with search via DelegatingCollector. It's quite
different to what Solr usually does. And it requires to relax encapsulation to
access {{ToParentBlockJoinQuery.BlockJoinScorer.swapChildDocs(int[])}}. To
accommodate this keeping encapsulation, we can add some public _accessor_ class
to {{o.a.l.search.join}} or made it *default* and add a class with
{{o.a.l.search.join}} package into solr codebase (%100 ugly).
As an alternative, we can migrate closer to regular a Solr approach, calculate
childDocset and run faceting over it. Please put your opinion, otherwise I'll
go to IRC and repeat the question.
> Faceting with BlockJoin support
> -------------------------------
>
> Key: SOLR-5743
> URL: https://issues.apache.org/jira/browse/SOLR-5743
> Project: Solr
> Issue Type: New Feature
> Components: faceting
> Reporter: abipc
> Assignee: Mikhail Khludnev
> Labels: features
> Fix For: 5.5
>
> Attachments: SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch,
> SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch, SOLR-5743.patch,
> SOLR-5743.patch
>
>
> For a sample inventory(note - nested documents) like this -
> <doc>
> <field name="id">10</field>
> <field name="type_s">parent</field>
> <field name="BRAND_s">Nike</field>
> <doc>
> <field name="id">11</field>
> <field name="COLOR_s">Red</field>
> <field name="SIZE_s">XL</field>
> </doc>
> <doc>
> <field name="id">12</field>
> <field name="COLOR_s">Blue</field>
> <field name="SIZE_s">XL</field>
> </doc>
> </doc>
> Faceting results must contain -
> Red(1)
> XL(1)
> Blue(1)
> for a "q=*" query.
> PS : The inventory example has been taken from this blog -
> http://blog.griddynamics.com/2013/09/solr-block-join-support.html
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