Ah, maybe that's what the problem is. With respect to the large number of tables, I have experienced the same problem. I have tried changing the ODBC connection's HTTP path so that it connected to a Serverless Warehouse, but I haven't been able to work that out yet. Also, while I am still trying to work out how to only connect to a single named schema (I haven't been able to figure out a wildcard), I can connect to a single Delta table, which is a much quicker process. In the Database field, I added the name of the table after the name of the ODBC connection.

It only lists that one table, but it does make the process much quicker. Hopefully that is of some help. If you make progress in other areas, I'll be happy to hear from you!