Invalid identifier "EXPR$0"

Hi,
I’m trying my hand at developing an ARP connector for BigQuery using the Magnitude Simba JDBC drivers.
So far so good, but I have problems when Dremio assigns a default identifier in the form EXPR${index}. It seems that for BigQuery the “$” symbol is not a valid identifier character.
Is there a way to configure the default expression identifier format?
Thanks in advance.