Hi @Farhan,
I don’t have the CData driver so I’m not sure what the problem is. From examining the stack trace I believe the driver is returning different typenames from the JDBC ResultSetMetaData object than what’s showing up in your ARP file (and also being different from the type names reported by DatabaseMetaData.getColumns()).
Is there a reason you must use the CData driver? Have you tried @panomike’s ARP file using Google’s official JDBC driver: https://cloud.google.com/bigquery/providers/simba-drivers ?