jayzhan211 commented on PR #12184:
URL: https://github.com/apache/datafusion/pull/12184#issuecomment-2313909494
Should we get Column's relation for Alias in `to_field`?
```rust
Expr::Alias(Alias { expr, name, .. }) => {
let relation = match expr.as_ref() {
Expr::Column(c) => c.relation.to_owned(),
_ => None
};
let (data_type, nullable) =
self.data_type_and_nullable(input_schema)?;
Ok((
relation,
Field::new(name, data_type, nullable)
.with_metadata(self.metadata(input_schema)?)
.into(),
))
}
```
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