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

["Ben Kietzman (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-5423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ben Kietzman updated ARROW-5423:
--------------------------------
    Fix Version/s:     (was: 2.0.0)
                   3.0.0

> [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: Ben Kietzman
>            Assignee: Ben Kietzman
>            Priority: Major
>             Fix For: 3.0.0
>
>
> 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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