Francois Saint-Jacques created ARROW-4776:
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Summary: [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
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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