jorisvandenbossche commented on issue #11027:
URL: https://github.com/apache/arrow/issues/11027#issuecomment-909174498
Ah, ARROW-12644 indeed only implemented the _decoding_ when reading, not the
equivalent _encoding_ when writing. But so if we can read such datasets, we
should probably also enable to write them? (will open a JIRA about that)
@wanx4910 To show that we can read values with encoded `/` (illustrating
what @westonpace mentioned above), I created a small dataset with two
directories with URL encoded values (using a european date format of
2012/01/01):
```
In [44]: !ls test_decoding.parquet/
2012%2F01%2F01 2012%2F01%2F02
In [45]: dataset = ds.dataset("test_decoding.parquet/",
partitioning=["date"], format="parquet")
In [46]: dataset
Out[46]: <pyarrow._dataset.FileSystemDataset at 0x7f110c345770>
In [47]: dataset.to_table().to_pandas()
Out[47]:
b date
0 1 2012/01/01
1 2 2012/01/02
```
So when reading, we can properly decode such values.
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