[GitHub] [arrow-rs] jhorstmann opened a new issue #626: ListArray equals should not consider nested values if element is marked as null

[GitBox <gi...@apache.org>]

jhorstmann opened a new issue #626:
URL: https://github.com/apache/arrow-rs/issues/626


   **Describe the bug**
   
   I would expect the following test case to pass. In both arrays the second element is marked as null and so they should compare equal.
   
   ```
   #[test]
   fn test_list_array_equal() {
       let mut builder = ListBuilder::new(Int64Builder::new(10));
       builder.values().append_value(1).unwrap();
       builder.values().append_value(2).unwrap();
       builder.values().append_value(3).unwrap();
       builder.append(true).unwrap();
       builder.append(false).unwrap();
       let array1 = builder.finish();
   
       let mut builder = ListBuilder::new(Int64Builder::new(10));
       builder.values().append_value(1).unwrap();
       builder.values().append_value(2).unwrap();
       builder.values().append_value(3).unwrap();
       builder.append(true).unwrap();
       builder.values().append_null().unwrap();
       builder.values().append_null().unwrap();
       builder.append(false).unwrap();
       let array2 = builder.finish();
   
       assert_eq!(array1, array2);
   }
   ```
   
   The output of the `assert_eq` also shows both sides the same:
   
   ```
   assertion failed: `(left == right)`
     left: `ListArray
   [
     PrimitiveArray<Int64>
   [
     1,
     2,
     3,
   ],
     null,
   ]`,
    right: `ListArray
   [
     PrimitiveArray<Int64>
   [
     1,
     2,
     3,
   ],
     null,
   ]`
   ```
   
   


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