kosiew commented on issue #1018:
URL:
https://github.com/apache/datafusion-python/issues/1018#issuecomment-2673258796
Managed to reproduce this without S3
```
import os
import tempfile
import pyarrow as pa
import pyarrow.parquet as pq
import datafusion
def create_parquet_file(file_path):
# Create a Parquet file containing duplicate partition columns using
pyarrow arrays
table = pa.Table.from_arrays(
[
pa.array([1, 2, 3]),
pa.array([2025, 2025, 2025]), # duplicate partition field
pa.array([10, 20, 30])
],
names=['id', 'year', 'value']
)
pq.write_table(table, file_path)
def test_duplicate_field_error():
with tempfile.TemporaryDirectory() as tmpdir:
# Create a hive-partitioned directory structure:
data/year=2025/month=1/day=1
storage_dir = os.path.join(tmpdir, "data", "year=2025", "month=1",
"day=1")
os.makedirs(storage_dir, exist_ok=True)
file_path = os.path.join(storage_dir, "data.parquet")
create_parquet_file(file_path)
ctx = datafusion.SessionContext()
# Register the external table with hive partitioning on local storage
create_table = f"""
CREATE EXTERNAL TABLE data
STORED AS PARQUET
PARTITIONED BY (year, month, day)
LOCATION '{os.path.join(tmpdir, "data")}'
"""
ctx.sql(create_table).collect()
# Query the table.
query = """
SELECT count(*) as cnt
FROM data
WHERE year = 2025 AND month = 1 AND day = 1
"""
# Run query without expecting exception.
result = ctx.sql(query).collect()
# Assert expected count. Adjust extraction of count as needed.
assert result[0].column("cnt")[0].as_py() == 3
```
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