neilconway opened a new issue, #10874:
URL: https://github.com/apache/arrow-rs/issues/10874
### Describe the bug
The Parquet spec allows scale to be equal to precision.
### To Reproduce
```rust
use parquet::basic::{ConvertedType, Repetition, Type as PhysicalType};
use parquet::data_type::Int32Type;
use parquet::file::properties::WriterProperties;
use parquet::file::reader::FileReader;
use parquet::file::serialized_reader::SerializedFileReader;
use parquet::file::writer::SerializedFileWriter;
use parquet::schema::types::Type;
use std::fs::File;
use std::sync::Arc;
// message schema { required int32 c (DECIMAL(5, 5)); }
let field = Type::primitive_type_builder("c", PhysicalType::INT32)
.with_repetition(Repetition::REQUIRED)
.with_converted_type(ConvertedType::DECIMAL)
.with_precision(5)
.with_scale(5)
.build()
.unwrap();
let schema = Arc::new(
Type::group_type_builder("schema")
.with_fields(vec![Arc::new(field)])
.build()
.unwrap(),
);
let file = File::create("/tmp/repro.parquet").unwrap();
let mut writer =
SerializedFileWriter::new(file, schema,
Arc::new(WriterProperties::builder().build())).unwrap();
let mut rg = writer.next_row_group().unwrap();
let mut col = rg.next_column().unwrap().unwrap();
col.typed::<Int32Type>().write_batch(&[12345], None, None).unwrap(); //
0.12345
col.close().unwrap();
rg.close().unwrap();
writer.close().unwrap();
let reader =
SerializedFileReader::new(File::open("/tmp/repro.parquet").unwrap()).unwrap();
let row = reader.get_row_iter(None).unwrap().next().unwrap().unwrap();
println!("{row}");
// panics: assertion failed: decimal.scale() >= 0 && decimal.precision() >
decimal.scale()
// expected: {c: 0.12345}
```
### Expected behavior
_No response_
### Additional context
_No response_
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