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https://issues.apache.org/jira/browse/LUCENE-9450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17386480#comment-17386480
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Gautam Worah commented on LUCENE-9450:
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Argh. Took some time to figure out the change that added the
getIndexCreatedVersionMajor() API.
However, a call like
`{color:#871094}indexWriter{color}.getConfig().getIndexCreatedVersionMajor()`
still returns the version as 9 for the older index.
{color:#000000}Something like
`SegmentInfos{color}.readLatestCommit({color:#871094}indexWriter{color}.getDirectory()).getIndexCreatedVersionMajor()`
also says the version is 9, where it should've reported 8. Needs some more
debugging..
> Taxonomy index should use DocValues not StoredFields
> ----------------------------------------------------
>
> Key: LUCENE-9450
> URL: https://issues.apache.org/jira/browse/LUCENE-9450
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Affects Versions: 8.5.2
> Reporter: Gautam Worah
> Priority: Minor
> Labels: performance
> Fix For: main (9.0)
>
> Attachments: LUCENE-9450-localrun.py-v1, wip_taxonomy_patch
>
> Time Spent: 4h
> Remaining Estimate: 0h
>
> The taxonomy index that maps binning labels to ordinals was created before
> Lucene added BinaryDocValues.
> I've attached a WIP patch (does not pass tests currently)
> Issue suggested by [~mikemccand]
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