Antoine Pitrou created ARROW-3722:
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             Summary: [C++] Allow specifying column types to CSV reader
                 Key: ARROW-3722
                 URL: https://issues.apache.org/jira/browse/ARROW-3722
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
    Affects Versions: 0.11.1
            Reporter: Antoine Pitrou


I'm not sure how to expose this. The easiest, implementation-wise, would be to 
allow passing a {{Schema}} (for example inside the {{ConvertOptions}}).

Another possibility is to allow specifying the default types for type 
inference. For example type inference currently infers integers as {{int64}}, 
but the user might prefer {{int32}}.

Thoughts?



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