[jira] [Created] (ARROW-9642) [C++] Let MakeBuilder refer DictionaryType's index_type to detect the starting bit width of the indices

[Kenta Murata (Jira)]

Kenta Murata created ARROW-9642:
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             Summary: [C++] Let MakeBuilder refer DictionaryType's index_type 
to detect the starting bit width of the indices
                 Key: ARROW-9642
                 URL: https://issues.apache.org/jira/browse/ARROW-9642
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Kenta Murata
            Assignee: Kenta Murata






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