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https://issues.apache.org/jira/browse/ARROW-5052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17662074#comment-17662074
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Rok Mihevc commented on ARROW-5052:
-----------------------------------
This issue has been migrated to [issue
#16047|https://github.com/apache/arrow/issues/16047] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [C++] Add an incomplete dictionary type
> ---------------------------------------
>
> Key: ARROW-5052
> URL: https://issues.apache.org/jira/browse/ARROW-5052
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.12.1
> Reporter: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> This would allow to pass a {{DataType}} that means "dict-encoded data with
> the given index types and value types, but the actual values are not yet
> known" (they might be inferred by processing non-dict-encoded data, or they
> might be transferred explicitly - but later - in the data stream).
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