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https://issues.apache.org/jira/browse/LUCENE-3496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martijn van Groningen updated LUCENE-3496:
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Attachment: LUCENE-3496.patch
bq. one thing I noticed about the patch is that you consider 0 ords as null
values which is not the case in IDV.
I changed that in the new patch.
I also included IDV implementation for AbstractFirstPassGroupingCollector.
I think it is time to include these collectors into the already existing tests.
Besides that we need IDV implementations for
AbstractSecondPassGroupingCollector and AbstractAllGroupHeadsCollector.
> Support grouping by IndexDocValues
> ----------------------------------
>
> Key: LUCENE-3496
> URL: https://issues.apache.org/jira/browse/LUCENE-3496
> Project: Lucene - Java
> Issue Type: New Feature
> Components: modules/grouping
> Reporter: Martijn van Groningen
> Attachments: LUCENE-3496.patch, LUCENE-3496.patch, LUCENE-3496.patch,
> LUCENE-3496.patch
>
>
> Although IDV is not yet finalized (More particular the SortedSource). I think
> we already can discuss / investigate implementing grouping by IDV.
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