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https://issues.apache.org/jira/browse/LUCENE-9328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17093929#comment-17093929
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Mikhail Khludnev commented on LUCENE-9328:
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[~romseygeek], you are welcome
[https://github.com/apache/lucene-solr/pull/1462/]
At the patch all type docvalues pooled already. I'm not sure I understand what
you mean in _control advancing the iterators_. Now there's no control. It's not
so scary as it looked at the first glance. Collector scores docs in-order
(o'rlly?), every doc just kicks a certain GroupHead, which pull a value(s) from
it. And that's it. I don't even think they ever call dv.advanceExact() for the
current dv.docID. I think I'll add a test covering grouping/sorting over
sortedset dvs.
> SortingGroupHead to reuse DocValues
> -----------------------------------
>
> Key: LUCENE-9328
> URL: https://issues.apache.org/jira/browse/LUCENE-9328
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/grouping
> Reporter: Mikhail Khludnev
> Assignee: Mikhail Khludnev
> Priority: Minor
> Attachments: LUCENE-9328.patch, LUCENE-9328.patch, LUCENE-9328.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> That's why
> https://issues.apache.org/jira/browse/LUCENE-7701?focusedCommentId=17084365&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17084365
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