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https://issues.apache.org/jira/browse/ARROW-6869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-6869.
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Fix Version/s: 0.15.1
Resolution: Fixed
Issue resolved by pull request 5687
[https://github.com/apache/arrow/pull/5687]
> [C++] Dictionary "delta" building logic in builder_dict.h produces invalid
> arrays
> ---------------------------------------------------------------------------------
>
> Key: ARROW-6869
> URL: https://issues.apache.org/jira/browse/ARROW-6869
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.0.0, 0.15.1
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> Looking at the unit tests for the dictionary delta logic -- the arrays that
> are produced by subsequent invocations of {{Finish}} yield DictionaryArray
> instances with partial dictionaries. I think this is misleading (I was
> surprised to find this while working on ARROW-6861). We should develop a
> different approach to computing dictionary delta.
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