jayzhan211 commented on PR #14927:
URL: https://github.com/apache/datafusion/pull/14927#issuecomment-2689800403
```rust
/// Return `self AS name` alias expression
pub fn alias(self, name: impl Into<String>) -> Expr {
Expr::Alias(Alias::new(self, None::<&str>, name.into()))
}
```
Add duplicate name check here didn't help.
https://github.com/apache/datafusion/blob/32224b48ca5f779ed2833f480f69af51c6637408/datafusion/expr/src/logical_plan/builder.rs#L748-L768
We have count(*) (alias) and count(1) (column name) which mismatches in
`missing_cols` in `sort`.
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