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https://issues.apache.org/jira/browse/ARROW-4776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rok Mihevc updated ARROW-4776:
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External issue URL: https://github.com/apache/arrow/issues/21295
> [C++] DictionaryBuilder should support bootstrapping from an existing dict
> type
> -------------------------------------------------------------------------------
>
> Key: ARROW-4776
> URL: https://issues.apache.org/jira/browse/ARROW-4776
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Francois Saint-Jacques
> Assignee: Ben Kietzman
> Priority: Minor
> Labels: pull-request-available
> Fix For: 0.13.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> This would mean adding a new DictionaryBuilder constructor that receives a
> dictionary type and performs a lazy deep copy if there's any modification.
> We'll have to investigate how this translate in API ergonomics.
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