fornwall opened a new issue, #24678:
URL: https://github.com/apache/datafusion/issues/24678
### Describe the bug
`enable_leaf_expression_pushdown` inlines a column's defining expression
into each extracted `get_field` that references it, but performs no volatility
check.
### To Reproduce
Run this:
```
datafusion-cli -c "SELECT s, s['a'] AS field FROM (SELECT named_struct('a',
random()) AS s FROM generate_series(1,3));"
```
### Expected behavior
`field` equals `s.a` on every row.
### Additional context
Setting `enable_leaf_expression_pushdown = false` avoids the bug (makes
`field` equals `s.a` on every row).
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