Nested data handling in Caclite

Hi, I work at Flipkart, we are using Calcite in our streaming platform. In most of our use cases, input data is nested. I understand Calcite flattens structs in scan and references fields positionally. I had a few questions on handling nested data - 1. Can RelNode DAG work with nested data

Question related to Schema and TableFactory

Hi, Can I generate relational node tree, if i just have schemas. Is TableFactory a essential part for query planner? Conceptually Schema should be enough to create a query planner and generate relational tree, If that is the case, can you help me with a sample code on how query planner can work

Help in understanding entities and abstractions in Calcite

Hi, I am a engineer at Flipkart, we are building SQL over our stream processing platform using Calcite. I am finding it hard to develop intuition for abstractions and entities in Apache Calcite, is there a book or documentation that walks through them? I would love if I could chat with one of