Method as_async

datafusion/expr/src/udf.rs:389–391

Return true if this function is an async function

(&self)

    /// Return true if this function is an async function
    pub fn as_async(&self) -> Option<&AsyncScalarUDF> {
        self.inner().downcast_ref::<AsyncScalarUDF>()
    }

    /// Returns placement information for this function.
    ///