dqkqd commented on PR #18104:
URL: https://github.com/apache/datafusion/pull/18104#issuecomment-3419071411
I verified the added test fail without the changes:
```
running 1 test
test
dataframe::array_distinct_on_list_with_inner_nullability_causing_type_mismatch
... FAILED
failures:
failures:
dataframe::array_distinct_on_list_with_inner_nullability_causing_type_mismatch
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 766
filtered out; finished in 0.29s
stderr ───
thread
'dataframe::array_distinct_on_list_with_inner_nullability_causing_type_mismatch'
panicked at datafusion/core/tests/dataframe/mod.rs:6554:46:
called `Result::unwrap()` on an `Err` value: Internal("Function
'array_distinct' returned value of type 'List(Field { name: \"item\",
data_type: Int32, nullable: false, dict_id: 0, dict_is_ordered: false,
metadata: {} })' while the following type was promised at planning time and
expected: 'List(Field { name: \"item\", data_type: Int32, nullable: true,
dict_id: 0, dict_is_ordered: false, metadata: {} })'")
note: run with `RUST_BACKTRACE=1` environment variable to display a
backtrace
Cancelling due to test failure:
────────────
Summary [ 0.331s] 1 test run: 0 passed, 1 failed, 1690 skipped
FAIL [ 0.298s] datafusion::core_integration
dataframe::array_distinct_on_list_with_inner_nullability_causing_type_mismatch
error: test run failed
```
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