willtemperley commented on issue #3307:
URL: https://github.com/apache/parquet-java/issues/3307#issuecomment-3263670018
That would be make sense, but what would be written to the DataPageHeader in
that case? Both `definition_level_encoding` and `repetition_level_encoding` are
required fields.
I noticed that pyarrow writes RLE when there are no rep levels. It only
writes Parquet 2 though I believe. Demonstrated by:
```python
import pyarrow as pa
import pyarrow.parquet as pq
# 1. Create a Parquet file with a required, non-repeated column
table = pa.table({"x": pa.array([1, 2, 3], type=pa.int32())})
pq.write_table(table, "test.parquet", version="2.6", use_dictionary=False)
```
Which creates:
[test.parquet.zip](https://github.com/user-attachments/files/22195438/test.parquet.zip)
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