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https://issues.apache.org/jira/browse/ARROW-5423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rok Mihevc updated ARROW-5423:
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External issue URL: https://github.com/apache/arrow/issues/21876
> [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
> Priority: Major
>
> 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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