Method is_volatile_node

datafusion/expr/src/expr.rs:2138–2140

Returns true if the expression node is volatile, i.e. whether it can return different results when evaluated multiple times with the same input. Note: unlike [`Self::is_volatile`], this function does not consider inputs: - `rand()` returns `true`, - `a + rand()` returns `false`

(&self)

    /// - `rand()` returns `true`,
    /// - `a + rand()` returns `false`
    pub fn is_volatile_node(&self) -> bool {
        matches!(self, Expr::ScalarFunction(func) if func.func.signature().volatility == Volatility::Volatile)
    }

    /// Returns true if the expression is volatile, i.e. whether it can return different
    /// results when evaluated multiple times with the same input.