Method might_error

src/expr/src/scalar.rs:646–655

A very crude approximation for scalar expressions that might produce an error. Currently, this is restricted only to expressions that either contain a literal error or a [`VariadicFunc::ErrorIfNull`] call.

(&self)

    /// Currently, this is restricted only to expressions that either contain a
    /// literal error or a [`VariadicFunc::ErrorIfNull`] call.
    pub fn might_error(&self) -> bool {
        let mut worklist = vec![self];
        while let Some(expr) = worklist.pop() {
            if expr.is_literal_err() || expr.is_error_if_null() {
                return true;
            }
            worklist.extend(expr.children());
        }
        false
    }

    /// Reduces a complex expression where possible.
    ///