jackwener commented on issue #1468:
URL:
https://github.com/apache/arrow-datafusion/issues/1468#issuecomment-1094025918
@Dandandan . Hi, I'm a little confused about the details.
--------
Now alias in `Expr`:
Expr is enum as
- Alias
- Column
- ScalarVariable
- ....
--------
After use `NamedExpr`，The structure is like this
- Alias
- OtherExpr
- Column
- ScalarVariable
- ....
------
Can we use this struct to present it?
```rust
struct NamedExpr {
/// Alias or generated name
name: Option<String>,
/// The expression
expr: Expr,
}
```
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