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https://issues.apache.org/jira/browse/SOLR-16139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17646316#comment-17646316
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Daniel Lowe commented on SOLR-16139:
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We also ran into this issue when migrating from Solr 8.4 to Solr 9.x. If you
have a JSON facet that has a sub-facet, and the main facet is on a
{{{}SortableTextField{}}}, unless the original and analyzed values for the main
buckets happen to be the same the sub-facet will be incomplete, or even
entirely ignored if none of the original and analyzed bucket names match.
[~magibney] your suggested fix, which gives the original behaviour empirically
fixed the issue for us. In our use case we are in fact using a
{{{}KeywordTokenizer{}}}, which I think avoids the trappy behaviour described
in SOLR-13056. As far as I'm aware the {{SortableTextField }}remains the only
way to have a field that acts like a string field for
faceting/sorting/streaming, but still allows, for example, case insensitivity
when searching against the field.
I'd personally prefer if this fix became part of Solr, although if I'm
understanding correctly the underlying issue is that the facetting code is now
requesting a {{getFieldTermQuery }}rather than a {{{}getFieldQuery{}}}. If the
bucket names are allowed to differ from the indexed value this doesn't seem to
be the right method.
Getting a bit pedantic, but {{getFieldTermQuery}} claims that no analysis
should be performed, but the default implementation just calls
{{getFieldQuery}} which doesn't make this guarantee.
> [Regression] JSON stat facet functions not working on analysed String
> (SortableTextField)
> -----------------------------------------------------------------------------------------
>
> Key: SOLR-16139
> URL: https://issues.apache.org/jira/browse/SOLR-16139
> Project: Solr
> Issue Type: Bug
> Components: faceting
> Affects Versions: 8.11.1
> Reporter: Jan Verbeeck
> Priority: Critical
> Labels: faceting, json
>
> After updating Solr on my dev environment to version 8.11.1 I noticed nested
> json stat facets where not working anymore. When downgrading to 8.11.0 worked
> as before.
> It seems the problem is related to using an analysed string fieldtype like
> 'solr.SortableTextField' and then using a subfacet with a stat facet function
> like 'avg'.
>
> I have managed to reproduce this behaviour using docker. You can find the
> repository here:
> [solr-json-repro|https://github.com/verbeeckjan/solr-json-repro]
>
> The only change I made to the default managed-schema is to change the type of
> the dynamic field '*_s' to 'text_gen_sort'.
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