Weston Pace created ARROW-13775:
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             Summary: [C++] Allow Partitioning objects to be created with a 
vector of field names
                 Key: ARROW-13775
                 URL: https://issues.apache.org/jira/browse/ARROW-13775
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Weston Pace


Formatting expressions should be doable without the data types.  If data types 
are provided then the expression literals should still be cast to the 
appropriate data type as before.

Parsing paths could be doable without the data types (we could infer this) but 
since we already have PartitioningFactory / FilesystemDatasetFactory for this 
use case I don't see much advantage in supporting that.



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