neilconway opened a new issue, #10863:
URL: https://github.com/apache/arrow-rs/issues/10863
### Describe the bug
`make_comparator` accepts two decimal arrays of the same width but different
scales and compares their raw unscaled values, resulting in incorrect results.
Such inputs should probably be rejected (as we do for decimals with different
widths).
### To Reproduce
```rust
use arrow_array::Decimal128Array;
use arrow_ord::ord::make_comparator;
use arrow_schema::SortOptions;
// 1.00 at scale 2
let a = Decimal128Array::from(vec![100])
.with_precision_and_scale(10, 2)
.unwrap();
// 0.500 at scale 3
let b = Decimal128Array::from(vec![500])
.with_precision_and_scale(10, 3)
.unwrap();
let cmp = make_comparator(&a, &b, SortOptions::default()).unwrap();
cmp(0, 0); // Ordering::Less — claims 1.00 < 0.500
```
### Expected behavior
_No response_
### Additional context
_No response_
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