sgilmore10 opened a new issue, #37515:
URL: https://github.com/apache/arrow/issues/37515
### Describe the bug, including details regarding any error messages,
version, and platform.
While working on #37448, I noticed the `Equals()` method of `ChunkedArray`
treats NaNs as equal by default. I found this behavior surprising because the
`Equals()` method of `Array` doesn't treat NaNs as equal by default.
Below is a program to reproduce this behavior:
```c++
#include <arrow/api.h>
#include <arrow/type.h>
#include <iostream>
#include <math.h>
#include <sstream>
arrow::Result<std::shared_ptr<arrow::ChunkedArray>> make_chunked_array() {
arrow::NumericBuilder<arrow::DoubleType> builder;
std::shared_ptr<arrow::Array> array;
ARROW_RETURN_NOT_OK(builder.AppendValues({0, 1, NAN, 2, 4}));
ARROW_RETURN_NOT_OK(builder.Finish(&array));
return arrow::ChunkedArray::Make({array});
}
int main(int argc, char *argv[])
{
auto maybe_chunked_array = make_chunked_array();
if (!maybe_chunked_array.ok()) {
return -1;
}
auto chunked_array = std::move(maybe_chunked_array).ValueUnsafe();
auto array = chunked_array->chunk(0);
std::stringstream stream;
stream << "array contents: ";
stream << "\n\n";
stream << array->ToString();
stream << "\n\n";
stream << "array->Equals(array): ";
stream << array->Equals(array);
stream << "\n\n";
stream << "chunked_array contents: ";
stream << "\n\n";
stream << chunked_array->ToString();
stream << "\n\n";
stream << "chunked_array->Equals(chunked_array): ";
stream << chunked_array->Equals(chunked_array);
std::cout << stream.str() << std::endl;
}
```
Here is the output of this program:
```shell
array contents:
[
0,
1,
nan,
2,
4
]
array->Equals(array): 0
chunked_array contents:
[
[
0,
1,
nan,
2,
4
]
]
chunked_array->Equals(chunked_array): 1
```
Am I correct in that this is a bug?
### Component(s)
C++
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