jorisvandenbossche commented on issue #11935:
URL: https://github.com/apache/arrow/issues/11935#issuecomment-992555111
Arrow itself has a concept of "field-level" metadata as well (which
corresponds to the column). Eg in python:
```python
>>> table = pa.table({"a": [1, 2, 3], "b": [4, 5, 6]})
>>> field_a = table.schema.field("a")
>>>field_a
pyarrow.Field<a: int64>
>> field_a = field_a.with_metadata({"a": "long name"})
>>> field_a.metadata
{b'a': b'long name'}
```
But it's a bit convoluted to then create a schema with this field with
metadata added.
This field metadata gets mapped to Parquet field-level metadata as well. And
I think you can access this in R as ``table$schema$a$metadata``
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