Method alias

datafusion/expr/src/expr.rs:1786–1788

Return `self AS name` alias expression

(self, name: impl Into<String>)

    /// Return `self AS name` alias expression
    pub fn alias(self, name: impl Into<String>) -> Expr {
        Expr::Alias(Alias::new(self, None::<&str>, name.into()))
    }

    /// Return `self AS name` alias expression with metadata
    ///