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https://issues.apache.org/jira/browse/SOLR-10835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16045335#comment-16045335
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Joel Bernstein commented on SOLR-10835:
---------------------------------------

bq. Note that since SortedNumericDocValues doesn't de-duplicate values.

We can add another ticket to use SortedNumericDocValues for Trie fields as 
well. But that shouldn't hold up this ticket.

> ExportWriter only works with TrieFooFields, not FooPointFields
> --------------------------------------------------------------
>
>                 Key: SOLR-10835
>                 URL: https://issues.apache.org/jira/browse/SOLR-10835
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Hoss Man
>            Assignee: Tomás Fernández Löbbe
>         Attachments: SOLR-10835.patch, SOLR-10835.patch, SOLR-10835.patch
>
>
> ExportWriter explicitly fails hard if you attempt to use it with any of the 
> new Numeric Points based fields.
> The current failures come from explicit {{if (fieldType instanceof 
> TrieFooField)}} checks in {{ExportWriter.getFieldWriters}} -- those could 
> probably be replaced with {{instanceof FooValueFieldType}} (the numeric 
> marker interfaces) or {{getNumericType()}} but i suspect in the multivalued 
> case other problems will arise due to how ExportWriter dips into the guts of 
> DocValues and assumes SortedSetDocValues 



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