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https://issues.apache.org/jira/browse/SOLR-5524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13837713#comment-13837713
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Yonik Seeley commented on SOLR-5524:
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bq. Is there really a reason the key needs to be an object? Why not just a
string like "scaleInfo"?
Two different scale functions in a single function query would then clash.
> Exception when using Query Function inside Scale Function
> ---------------------------------------------------------
>
> Key: SOLR-5524
> URL: https://issues.apache.org/jira/browse/SOLR-5524
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.6
> Reporter: Trey Grainger
> Priority: Minor
> Fix For: 4.7
>
> Attachments: SOLR-5524.patch
>
>
> If you try to use the query function inside the scale function, it throws the
> following exception:
> org.apache.lucene.search.BooleanQuery$BooleanWeight cannot be cast to
> org.apache.lucene.queries.function.valuesource.ScaleFloatFunction$ScaleInfo
> Here is an example request that invokes this:
> http://localhost:8983/solr/collection1/select?q=*:*&fl=scale(query($x),0,5)&x=hello)
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