yf-yang commented on issue #38794:
URL: https://github.com/apache/arrow/issues/38794#issuecomment-1819038094
@mapleFU As I learned from some stack overflow answers, I did try to use
different prefix with the path, for example,
## without `s3://`
``` python
pq.ParquetDataset('bucket/parquet_root/', filesystem=s3fs,
partitioning=ds.DirectoryPartitioning(pa.schema([("set", pa.string()),
("subset", pa.string())])))
# FileNotFoundError: bucket/parquet_root/
```
## or, with a prefix `/` only
``` python
pq.ParquetDataset('/bucket/parquet_root/', filesystem=s3fs,
partitioning=ds.DirectoryPartitioning(pa.schema([("set", pa.string()),
("subset", pa.string())])))
# pyarrow.lib.ArrowInvalid: GetFileInfo() yielded path
'bucket/parquet_root/abc/def/part-0.parquet', which is outside base dir
'/bucket/parquet_root/'
```
---
https://github.com/apache/arrow/issues/26864#issuecomment-1377982984 works
because as I shown in the issue:
>
pq.read_table('bucket/parquet_root/abc/def/part-0.parquet',filesystem=s3fs) # ok
>
pq.read_table('s3://bucket/parquet_root/abc/def/part-0.parquet',filesystem=s3fs)
# ok
Both approach is OK, so with the flag `use_pandas_metadata=True` the call is
also OK. However, I still do not know what to do with a partitioned dataset.
---
I also tried to reproduce
https://github.com/apache/arrow/issues/26864#issuecomment-1377982966
``` python
from pyarrow.fs import FileSelector, PyFileSystem, FSSpecHandler
fs = PyFileSystem(FSSpecHandler(s3fs))
selector = FileSelector("s3://bucket/parquet_root/", recursive=True)
fs.get_file_info(selector)
```
It returns
``` python
[
<FileInfo for 'bucket/parquet_root': type=FileType.Directory>,
<FileInfo for 'bucket/parquet_root/': type=FileType.File, size=0>,
<FileInfo for 'bucket/parquet_root/abc': type=FileType.Directory>,
<FileInfo for 'bucket/parquet_root/abc/': type=FileType.File, size=0>,
<FileInfo for 'bucket/parquet_root/abc/def': type=FileType.Directory>,
<FileInfo for 'bucket/parquet_root/abc/def/': type=FileType.File, size=0>,
<FileInfo for 'bucket/parquet_root/abc/def/part-0.parquet':
type=FileType.File, size=1078092>
]
```
Not sure if it helps
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