alamb opened a new issue, #3513:
URL: https://github.com/apache/arrow-rs/issues/3513
**Describe the bug**
The formatting of floats as printed by `pretty_print_batches` and the CSV
Writer is inconsistent
**To Reproduce**
```rust
fn main() {
let arr = Float64Array::from(vec![Some(1.0), None, Some(2.0)]);
let batch = RecordBatch::try_from_iter(vec![
("col", Arc::new(arr) as _)
]).unwrap();
println!("Display");
println!("{}", pretty_format_batches(&[batch.clone()]).unwrap());
println!("CSV");
let mut writer = Writer::new(std::io::stdout());
writer.write(&batch).unwrap();
}
```
Produces the output:
```
Display
+-----+
| col |
+-----+
| 1 |
| |
| 2 |
+-----+
CSV
col
1.0
""
2.0
```
Note how pretty print shows `1` and csv shows `1.0`
**Expected behavior**
I expect the displays to be the same (likely by making the csv writer
consistent with the pretty printer)
**Additional context**
See other usecase on on
https://github.com/apache/arrow-datafusion/issues/4876
I think https://github.com/apache/arrow-rs/issues/3483 from @JayjeetAtGithub
covers one potential implementation mechanism
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