adriangb opened a new issue, #20430:
URL: https://github.com/apache/datafusion/issues/20430
### Describe the bug
Run:
```sql
copy (
select {f1: 1, f2: 2} as s
) to 'struct.parquet';
create external table struct
stored as parquet
location 'struct.parquet';
SELECT
get_field(s, 'f1') AS __datafusion_extracted_2
FROM struct
WHERE COALESCE(get_field(s, 'f1'), get_field(s, 'f2')) = 42;
```
### To Reproduce
_No response_
### Expected behavior
_No response_
### Additional context
_No response_
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