[jira] [Created] (PARQUET-1423) [C++] Support reading non-dictionary encoded binary Parquet columns directly as DictionaryArray

Tue, 25 Sep 2018 04:26:20 -0700 

Wes McKinney created PARQUET-1423:
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             Summary: [C++] Support reading non-dictionary encoded binary 
Parquet columns directly as DictionaryArray
                 Key: PARQUET-1423
                 URL: https://issues.apache.org/jira/browse/PARQUET-1423
             Project: Parquet
          Issue Type: Improvement
          Components: parquet-cpp
            Reporter: Wes McKinney
             Fix For: cpp-1.6.0


If the goal is to hash this data anyway into a categorical-type array, then it 
would be better to offer the option to "push down" the hashing into the Parquet 
read hot path rather than first fully materializing a dense vector of 
{{ByteArray}} values, which could use a lot of memory after decompression



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