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https://issues.apache.org/jira/browse/LUCENE-4765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576553#comment-13576553
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Robert Muir commented on LUCENE-4765:
-------------------------------------
some progress:
* 4.2, assertingcodec, checkindex, etc are working
* fieldcache.getDocTermOrds returns SortedSetDocValues (and from IR if you
indexed them)
* join/ and grouping/ are ported over to the new API
next step:
* simpletext and disk codecs.
> Multi-valued docvalues field
> ----------------------------
>
> Key: LUCENE-4765
> URL: https://issues.apache.org/jira/browse/LUCENE-4765
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Robert Muir
> Attachments: LUCENE-4765.patch
>
>
> The general idea is basically the docvalues parallel to
> FieldCache.getDocTermOrds/UninvertedField
> Currently this stuff is used in e.g. grouping and join for multivalued
> fields, and in solr for faceting.
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