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https://issues.apache.org/jira/browse/LUCENE-9450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17382366#comment-17382366
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Gautam Worah commented on LUCENE-9450:
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Hi [~mayya] , I had looked at that test briefly when it was disabled.
So, for now, I could modify the test so that it checks that the previously
indexed StoredFields based field, can be read (and not modified).
But the larger concern, is that with this [LUCENE-9334] change, a user won't be
able to add docs with the new Lucene 9.0 version without reindexing (if they
have fields that were previously indexed with an older Lucene version).
> 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: 3h 50m
> 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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