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https://issues.apache.org/jira/browse/LUCENE-7074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dean Gurvitz updated LUCENE-7074:
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Attachment: LUCENE-7074.patch
The patch contains the changes needed to enable grouping in Lucene. If this
succeeds, we will move on to making the needed changes in Solr.
> Grouping using custom logic
> ---------------------------
>
> Key: LUCENE-7074
> URL: https://issues.apache.org/jira/browse/LUCENE-7074
> Project: Lucene - Core
> Issue Type: New Feature
> Components: core/search
> Reporter: Dean Gurvitz
> Labels: features
> Fix For: master
>
> Attachments: LUCENE-7074.patch
>
>
> My company would like to enable customized grouping in Lucene/Solr. Our need
> is to allow grouping by hamming distance between two text field values. We
> started implementing this idea in Lucene through editing several
> classes (Grouping, AbstractTermFirstPassGroupingCollector and
> AbstractTermSecondPassGroupingCollector)
> so that they receive custom logic to use for grouping.
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