grobgl opened a new issue, #8551:
URL: https://github.com/apache/iceberg/issues/8551
### Feature Request / Improvement
When querying an Iceberg table using PyIceberg for a specific set of fields,
the order of fields in the `selected_fields` parameter is not preserved in the
output. This is counter-intuitive as query engines usually respect the order of
columns as specified.
```python
from pyiceberg.catalog import load_catalog
from pyiceberg.expressions import GreaterThanOrEqual
catalog = load_catalog("default")
table = catalog.load_table("nyc.taxis")
scan = table.scan(
row_filter=GreaterThanOrEqual("trip_distance", 10.0),
selected_fields=("VendorID", "tpep_pickup_datetime",
"tpep_dropoff_datetime"),
)
df = scan.to_pandas() # column order is not guaranteed to equal order in
selected_fields
```
AFAICT, this is because `Schema.select` converts the selected fields to a
`set`.
### Query engine
Other
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