Method downcast_array_helper

datafusion/common/src/lib.rs:156–166

(&self)

    impl<T: Array + ?Sized> DowncastArrayHelper for T {
        fn downcast_array_helper<U: Any>(&self) -> Result<&U> {
            self.as_any().downcast_ref().ok_or_else(|| {
                let actual_type = self.data_type();
                let desired_type_name = type_name::<U>();
                _internal_datafusion_err!(
                    "could not cast array of type {} to {}",
                    actual_type,
                    desired_type_name
                )
            })
        }
    }
}