kawadakk opened a new issue, #4637:
URL: https://github.com/apache/arrow-rs/issues/4637
**Describe the bug**
`<ListArray as PartialEq>::eq` returns `false` for two arrays of datatype
`List(FixedSizeBinary(5))` containing identical values but physically differ.
**To Reproduce**
```rust
#[test]
fn test_list_excess_children_equal() {
let a_values = create_fixed_size_binary_array([Some(b"11111"),
Some(b"22222"), None]);
// ^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^
// a[0] a[1]
let a: ListArray =
ArrayDataBuilder::new(DataType::List(Arc::new(Field::new(
"item",
a_values.data_type().clone(),
true,
))))
.len(2)
.add_buffer(Buffer::from(vec![0i32, 1, 3].to_byte_slice()))
.add_child_data(a_values.into_data())
.null_bit_buffer(Some(Buffer::from(&[0b00000010])))
.build()
.unwrap()
.into();
let b_values = create_fixed_size_binary_array([Some(b"22222"), None]);
// ^^^^^^^^^^^^^^^^^^^^
// a[1]
let b: ListArray =
ArrayDataBuilder::new(DataType::List(Arc::new(Field::new(
"item",
b_values.data_type().clone(),
true,
))))
.len(2)
.add_buffer(Buffer::from(vec![0i32, 0, 2].to_byte_slice()))
.add_child_data(b_values.into_data())
.null_bit_buffer(Some(Buffer::from(&[0b00000010])))
.build()
.unwrap()
.into();
a.to_data().validate_full().unwrap();
b.to_data().validate_full().unwrap();
assert_eq!(a, b);
}
// from `arrow/tests/array_equal.rs`
fn create_fixed_size_binary_array<U: AsRef<[u8]>, T: AsRef<[Option<U>]>>(
data: T,
) -> FixedSizeBinaryArray {
let mut builder =
FixedSizeBinaryBuilder::with_capacity(data.as_ref().len(), 5);
for d in data.as_ref() {
if let Some(v) = d {
builder.append_value(v.as_ref()).unwrap();
} else {
builder.append_null();
}
}
builder.finish()
}
```
```
thread 'test_list_excess_children_equal' panicked at 'assertion failed:
`(left == right)`
left: `ListArray
[
null,
FixedSizeBinaryArray<5>
[
[50, 50, 50, 50, 50],
null,
],
]`,
right: `ListArray
[
null,
FixedSizeBinaryArray<5>
[
[50, 50, 50, 50, 50],
null,
],
]`', arrow\tests\array_equal.rs:399:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
**Expected behavior**
Returning `true` because they contain identical values, as shown by the
debug printing
**Additional context**
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