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https://issues.apache.org/jira/browse/SOLR-10321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932832#comment-15932832
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David Smiley commented on SOLR-10321:
-------------------------------------
Ah; ok. Solving this would be a bit tricky due to the division of
responsibility between the UnifiedHighlighter (Lucene) and
UnifiedSolrHighlighter. We would need to shim in an intermediate
StoredVieldVisitor to track which fields are seen vs not at all, and store it
on Solr's UH subclass instance. That doesn't seem worth it to me, especially
just for wildcards in "hl.fl".
What might make sense (to me) is a new boolean option to have
UnifiedSolrHighlighter omit returning empty-string highlights altogether.
Although enabling that would conceal the distinction of the inability to find
any snippet from stored text, vs not having any stored text to even highlight.
I dunno.
I assume this is just a minor nuisance for you Markus?
> Unified highlighter returns empty fields when using glob
> --------------------------------------------------------
>
> Key: SOLR-10321
> URL: https://issues.apache.org/jira/browse/SOLR-10321
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: highlighter
> Affects Versions: 6.4.2
> Reporter: Markus Jelsma
> Priority: Minor
> Fix For: master (7.0)
>
>
> {code}
> q=lama&hl.method=unified&hl.fl=content_*
> {code}
> returns:
> {code}
> <lst
> name="http://www.nu.nl/weekend/3771311/dalai-lama-inspireert-westen.html";>
> <arr name="content_en"/>
> <arr name="content_nl">
> <str>Nobelprijs Voorafgaand aan zijn bezoek aan Nederland is de dalai
> <em>lama</em> in Noorwegen om te vieren dat 25 jaar geleden de
> Nobelprijs voor de Vrede aan hem werd toegekend. Anders dan in Nederland
> wordt de dalai <em>lama</em> niet ontvangen in het Noorse
> parlement. </str>
> </arr>
> <arr name="content_general"/>
> <arr name="content_de"/>
> <arr name="content_fr"/>
> <arr name="content_es"/>
> <arr name="content_pt"/>
> <arr name="content_ja"/>
> <arr name="content_zh-cn"/>
> <arr name="content_th"/>
> <arr name="content_ar"/>
> </lst>
> {code}
> FastVector and original do not emit:
> {code}
> <arr name="content_de"/>
> <arr name="content_fr"/>
> <arr name="content_es"/>
> <arr name="content_pt"/>
> <arr name="content_ja"/>
> <arr name="content_zh-cn"/>
> <arr name="content_th"/>
> <arr name="content_ar"/>
> {code}
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