Feedback on Iceberg Materialized View Spec

[Jan Kaul]

Hi all,

I've created an issue <https://github.com/apache/iceberg/issues/6420> to 
propose a design for a Materialized View Spec a while ago. After further 
discussion we reached a first draft for the spec. It would be great if 
you could have another look at the design and share your feedback.

Here is the google doc: 
https://docs.google.com/document/d/1UnhldHhe3Grz8JBngwXPA6ZZord1xMedY5ukEhZYF-A/edit?usp=sharing

Thanks in advance,

Jan