alamb commented on issue #19049:
URL: https://github.com/apache/datafusion/issues/19049#issuecomment-3746141735
Current error is
```sql
> SET datafusion.execution.parquet.skip_metadata = false;
SELECT AVG(usage_idle), AVG(usage_system)
FROM (
SELECT time, usage_idle, NULL::DOUBLE as usage_system FROM
'union_all_repro.parquet'
UNION ALL
SELECT time, NULL::DOUBLE as usage_idle, usage_system FROM
'union_all_repro.parquet'
);
0 row(s) fetched.
Elapsed 0.013 seconds.
Internal error: Physical input schema should be the same as the one
converted from logical input schema. Differences:
- field metadata at index 0 [usage_idle]: (physical)
{"iox::column::type": "iox::column_type::field::float"} vs (logical) {}
- field metadata at index 1 [usage_system]: (physical)
{"iox::column::type": "iox::column_type::field::float"} vs (logical) {}.
This issue was likely caused by a bug in DataFusion's code. Please help us
to resolve this by filing a bug report in our issue tracker:
https://github.com/apache/datafusion/issues
```
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