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https://issues.apache.org/jira/browse/LUCENE-7736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16211070#comment-16211070
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Adrien Grand commented on LUCENE-7736:
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Your point about using the description for equals is correct, but I still find
it fragile. I think it's important for equals to behave correctly and never
return true for values sources that could return different values.
Looking again at the patch, I think you forgot to update FunctionMatchQuery to
make it rewrite the values source?
bq. I really dislike the 'rewrite until things stay the same' API on Query...
Let's open an issue about fixing it?
> Expose some IndexReader stats via DoubleValuesSources
> -----------------------------------------------------
>
> Key: LUCENE-7736
> URL: https://issues.apache.org/jira/browse/LUCENE-7736
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Minor
> Attachments: LUCENE-7736.patch, LUCENE-7736.patch, LUCENE-7736.patch,
> LUCENE-7736.patch, LUCENE-7736.patch
>
>
> We have a number of ValueSource implementations that expose IndexReader stats
> (numDocs, termFreq, etc). We should re-implement these as
> DoubleValuesSources, allowing them to be used in FunctionScoreQuery, etc.
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