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https://issues.apache.org/jira/browse/ARROW-5933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou updated ARROW-5933:
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Fix Version/s: 1.0.0
> [C++] [Documentation] add discussion of Union.typeIds to Layout.rst
> --------------------------------------------------------------------
>
> Key: ARROW-5933
> URL: https://issues.apache.org/jira/browse/ARROW-5933
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Documentation
> Reporter: Benjamin Kietzman
> Assignee: Benjamin Kietzman
> Priority: Major
> Fix For: 1.0.0
>
>
> Union.typeIds is poorly documented and the corresponding property in
> UnionType is confusingly named type_codes. In particular, Layout.rst doesn't
> include an explanation of Union.typeIds and implies that an element of a
> union array's type_ids buffer is always the index of a child array.
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