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https://issues.apache.org/jira/browse/LUCENE-9450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17382068#comment-17382068
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Mayya Sharipova commented on LUCENE-9450:
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Hello [~gworah]! I wanted to ask opinion what to do with the test
org.apache.lucene.facet.taxonomy.directory.TestBackwardsCompatibility::testCreateNewTaxonomy.
Because of LUCENE-9334 it is no longer possible to modify fields data
structures even for older indices. Thus we can't add a new $full_path$ field
indexed with BinaryDocValues, because in previous segments of the older index
this field was indexed without doc values. So unfortunately, I can't see any
way to enable this test.
> 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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