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https://issues.apache.org/jira/browse/LUCENE-8094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16293874#comment-16293874
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Adrien Grand commented on LUCENE-8094:
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+1
> Improve TermInSetQuery.toString
> -------------------------------
>
> Key: LUCENE-8094
> URL: https://issues.apache.org/jira/browse/LUCENE-8094
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Fix For: master (8.0), 7.3
>
> Attachments: LUCENE-8094.patch
>
>
> Today a {{TermInSetQuery}} on field F and terms A, B, C returns this from
> {{toString}}:
> {noformat}
> F:A F:B F:C
> {noformat}
> But this gets misleading when you embed it in a {{BooleanQuery}} as a negated
> clause, which then renders like this:
> {noformat}
> -F:A F:B F:C
> {noformat}
> Making it look like only the first clause is negated when in fact they all
> are.
> So ... I'd like to instead change it to:
> {noformat}
> F:(A B C)
> {noformat}
> I know {{Query.toString}} is simply best-effort, is not guaranteed to make
> something you can then parse in any query parser back to itself, etc., but I
> think we should still try to make a string that is not misleading when humans
> stare at it?
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