[jira] [Created] (ARROW-5423) [C++] implement partial schema class to extend JSON conversion

["Benjamin Kietzman (JIRA)" <ji...@apache.org>]

Benjamin Kietzman created ARROW-5423:
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             Summary: [C++] implement partial schema class to extend JSON conversion
                 Key: ARROW-5423
                 URL: https://issues.apache.org/jira/browse/ARROW-5423
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++, Python
            Reporter: Benjamin Kietzman
            Assignee: Benjamin Kietzman


Currently the JSON parser supports only basic conversion rules such as parsing a number to {{int64}}. In general users will want more capable conversions like parsing a base64 string into binary or parsing a column of objects to {{map<string, string>}} instead of {{struct<string...>}}. This will require extension of {{arrow::json::ParseOptions::explicit_schema}} to something analagous to a schema but which supports mapping to more than a simple output type.



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