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https://issues.apache.org/jira/browse/ARROW-10403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson reassigned ARROW-10403:
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Assignee: Rok Mihevc (was: Ben Kietzman)
> [C++] Implement unique kernel for dictionary type
> -------------------------------------------------
>
> Key: ARROW-10403
> URL: https://issues.apache.org/jira/browse/ARROW-10403
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Neal Richardson
> Assignee: Rok Mihevc
> Priority: Major
>
> Calling the "unique" compute function on a ChunkedArray of dictionary type
> (as read by the CSV reader) errors with "Only hashing for data with equal
> dictionaries currently supported". But is it necessary to hash to get unique
> values from a dictionary type? The dictionary values are the unique values
> (for each chunk), they're already there.
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