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https://issues.apache.org/jira/browse/SOLR-11679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-11679:
----------------------------
    Attachment: SOLR-11679.patch

> TraveValueSource & trace() parser
> ---------------------------------
>
>                 Key: SOLR-11679
>                 URL: https://issues.apache.org/jira/browse/SOLR-11679
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>            Assignee: Hoss Man
>            Priority: Trivial
>         Attachments: SOLR-11679.patch
>
>
> I whiped up a little TraceValueSource and {{trave()}} function parser to help 
> demonstrate how/when the ValueSource API was used by the FunctionRangeQParser 
> for the purposes of a blog post i'm about to publish.
> Essentially it just writes a log message with some tracing details everytime 
> one of the {{FunctionValue}} methods (ie: exists, intVal, floatVal, etc...) 
> are called, so that when used from FunctionRangeQParser you can see how 
> things like {{cost}} and post-filtering impact things.
> I don't think there is a lot of value in committing the code as is -- it 
> would be dangerously verbose on non trivial indexes -- but i wanted to put 
> the patch in jira in case it inspires anyone with a more interesting idea.



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