Tables and Views in a query

[Homer]

Hello,

I am currently trying to gather table and view information out of 
Calcite for security checking access.

I am currently finding it is quite complicated to process through a 
complex query to get all the tables and views in use.

I am processing through the SqlNode returned by the equivalent of 
planner.parse(sql_query_text).

I need to do it here prior to expansion of views as I need to know it 
was a view not the full table in use.

I just want to check if there is a better way to get this information?

thanks