mvanschellebeeck opened a new issue, #4502:
URL: https://github.com/apache/arrow-datafusion/issues/4502
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
Add support to the arrow CSV writer for writing lists.
Currently an sqllogictest of the format:
```
query T
SELECT array_agg(c13) FROM (SELECT * FROM aggregate_test_100 ORDER BY c13
LIMIT 2) test
----
[0VVIHzxWtNOFLtnhjHEKjXaJOSLJfm0keZ5G8BffGwgF2RwQD59TFzMStxCB]
```
will fail with
`thread 'main' panicked at 'called Result::unwrap() on an Err value:
CsvError("CSV Writer does not support List(Field { name: \"item\", data_type:
Utf8, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }) data
type")', datafusion/core/tests/sqllogictests/src/main.rs:134:33`
Source of failure in arrow-csv:
https://github.com/apache/arrow-rs/blob/master/arrow-csv/src/writer.rs#L228
Not sure if this makes sense to implement upstream (in arrow-csv) or as part
of datafusions test harness
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