Method register_udwf

datafusion/expr/src/registry.rs:260–262

(&mut self, udaf: Arc<WindowUDF>)

        Ok(self.udafs.insert(udaf.name().into(), udaf))
    }
    fn register_udwf(&mut self, udaf: Arc<WindowUDF>) -> Result<Option<Arc<WindowUDF>>> {
        Ok(self.udwfs.insert(udaf.name().into(), udaf))
    }

    fn expr_planners(&self) -> Vec<Arc<dyn ExprPlanner>> {
        vec![]