Wes McKinney created ARROW-462:
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Summary: [C++] Implement in-memory conversions between non-nested
primitive types and DictionaryArray equivalent
Key: ARROW-462
URL: https://issues.apache.org/jira/browse/ARROW-462
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Wes McKinney
We use a hash table to extract unique values and dictionary indices. There may
be an opportunity to consolidate common code from the dictionary encoding
implementation implemented in parquet-cpp (but the dictionary indices will not
be run-length encoded in Arrow):
https://github.com/apache/parquet-cpp/blob/master/src/parquet/encodings/dictionary-encoding.h
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