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https://issues.apache.org/jira/browse/ARROW-4374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17661396#comment-17661396
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Rok Mihevc commented on ARROW-4374:
-----------------------------------
This issue has been migrated to [issue
#20941|https://github.com/apache/arrow/issues/20941] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [C++] DictionaryBuilder does not correctly report length and null_count
> -----------------------------------------------------------------------
>
> Key: ARROW-4374
> URL: https://issues.apache.org/jira/browse/ARROW-4374
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Affects Versions: 0.12.0
> Reporter: Uwe Korn
> Assignee: Uwe Korn
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.12.1, 0.13.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In comparison to most builders, they stay constantly at 0.
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