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https://issues.apache.org/jira/browse/LUCENE-5220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-5220.
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Resolution: Fixed
Fix Version/s: 4.6
5.0
> Expression SortField has crappy toString/bad equals/hashcode
> ------------------------------------------------------------
>
> Key: LUCENE-5220
> URL: https://issues.apache.org/jira/browse/LUCENE-5220
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.6
> Reporter: Robert Muir
> Fix For: 5.0, 4.6
>
> Attachments: LUCENE-5220.patch
>
>
> While doing some unrelated debugging:
> I noticed when printing the Sort, the expressions get the inherited toString
> for a CUSTOM comparator, which is not very good:
> {noformat}
> <custom:"sqrt(_score) + ln(popularity)": null>!
> {noformat}
> I think its better if it looks something like this instead:
> {noformat}
> <expr "sqrt(_score) + ln(popularity)">!
> {noformat}
> Also equals/hashcode is wrong: it will bogusly report equals(true) if the
> expression is the same: but bindings could be different!
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