tustvold opened a new issue, #4688:
URL: https://github.com/apache/arrow-rs/issues/4688
**Describe the bug**
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A clear and concise description of what the bug is.
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The dictionary comparison kernels fail to account for nulls nested within
dictionaries
**To Reproduce**
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Steps to reproduce the behavior:
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```
fn test_dictionary_nested_nulls() {
let keys = Int32Array::from(vec![0, 1, 2]);
let v1 = Arc::new(Int32Array::from(vec![Some(0), None, Some(2)]));
let a = DictionaryArray::new(keys.clone(), v1);
let v2 = Arc::new(Int32Array::from(vec![None, Some(0), Some(2)]));
let b = DictionaryArray::new(keys, v2);
let r = eq_dyn(&a, &b).unwrap();
assert_eq!(r.null_count(), 2);
}
```
**Expected behavior**
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A clear and concise description of what you expected to happen.
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**Additional context**
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Add any other context about the problem here.
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