amoeba commented on issue #43303:
URL: https://github.com/apache/arrow/issues/43303#issuecomment-2237103075
Hi @prayaggordy, you're right that when a dataset is written with
partitioning, the partition fields aren't stored in the files.
Arrow's partitioning approach does auto detection like other systems but
allows you to provide a schema as an alternative which I think should get you
what you want:
```r
> my_schema <- schema(field("cyl_ch", string()))
> open_dataset("output/partition_cyl_ch", partitioning = my_schema)
FileSystemDataset with 3 Parquet files
13 columns
mpg: double
cyl: double
disp: double
hp: double
drat: double
wt: double
qsec: double
vs: double
am: double
gear: double
carb: double
gear_ch: string
cyl_ch: string
```
Would this work for your use case?
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