Method resolve_lambda_variables

datafusion/expr/src/expr.rs:2279–2284

Return a `Expr` with all [`LambdaVariable`] resolved only if all of them are contained in the subtree of the [`HigherOrderFunction`] it originates from, otherwise returns an error

(
        self,
        schema: &DFSchema,
    )

    /// are contained in the subtree of the [`HigherOrderFunction`] it originates from,
    /// otherwise returns an error
    pub fn resolve_lambda_variables(
        self,
        schema: &DFSchema,
    ) -> Result<Transformed<Expr>> {
        resolve_lambda_variables(self, schema, &mut HashMap::new())
    }
}

impl Normalizeable for Expr {