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https://issues.apache.org/jira/browse/SOLR-10486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968401#comment-15968401
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Joel Bernstein commented on SOLR-10486:
---------------------------------------

[~dpgove], one thing to notice about the new patch is an adjustment I made to 
how the SelectStream is handling exceptions when the Evaluators are 
constructed. The way it was before exceptions during Evaluator initialization 
were being swallowed. So I added a specific EvaluatorException that would be 
thrown rather then swallowed.

> Add Length Conversion Evaluators
> --------------------------------
>
>                 Key: SOLR-10486
>                 URL: https://issues.apache.org/jira/browse/SOLR-10486
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>         Attachments: SOLR-10486.patch, SOLR-10486.patch
>
>
> Based on the work in SOLR-10485 I think it makes sense to add Conversion 
> evaluators. I think a good place to start is with the conversions listed here:
> https://www.learner.org/interactives/metric/conversion_chart.html#1
> This ticket will add length conversions and lay down the initial syntax.
> Sample syntax:
> {code}
> select(eval(), convert(inches, meters, 22) as meters)
> {code}
> This will return a single tuple with 22 inches converted to meters.



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