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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2019/03/11 09:07:00 UTC
[jira] [Commented] (LUCENE-8718) Add docValueCount support for
SortedSetDocValues
[ https://issues.apache.org/jira/browse/LUCENE-8718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16789317#comment-16789317 ]
Adrien Grand commented on LUCENE-8718:
--------------------------------------
Should we do it? Counts are required with numerics because they don't have a special value that can be used to signal that all values have been consumed. This change limits a bit what can be done in terms of encoding since it requires the count to be recorded explicitly. For instance I think the first implementation of SortedSet used to record deltas between consecutive ords as a set of vlongs in a binary doc-value field. This wouldn't be possible with this new API anymore.
> Add docValueCount support for SortedSetDocValues
> ------------------------------------------------
>
> Key: LUCENE-8718
> URL: https://issues.apache.org/jira/browse/LUCENE-8718
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Affects Versions: 7.7.1
> Reporter: John Wang
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> implement docValueCount method for SortedSetDocValues, see comment:
>
> [https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/index/SortedSetDocValues.java#L54]
>
> Patch/PR: https://github.com/apache/lucene-solr/pull/603
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