The goal is to have access to all the tables that are being scanned or will be scanned as a part of the query. Basically, the callback looks like this:
Now, the problem is when there is a nested query, the function will be called once for the parent query and once for the subquery. However, I need access to the whole query in this function. There seems to be no CustomScan callback before this that has the whole query passed to it. Is there any way I can get access to the complete query (or all the relations in the query) by using the parameters passed to this function? Or any other workaround?
