Hi, I have added a pull request #724. The test shows the unexpected behavior, but the fix is probably not an optimal solution.
I still believe that this should be handled by either hibernate.globally_quoted_identifiers, or with `my schema` as with annotations for database vendor specific escaping + plus some sort of un-escaping in org.hibernate.tool.hbm2ddl.DatabaseMetadata#getTableMetadata(). But I do not have the overview over the code base for a safe fix.