Source DB could be on Oracle or Sqlserver - which connection manager is suitable for this

Hi,

Working on ETL for a source system that may be deployed in Oracle ,Sqlserver, H2 or Mysql. For now we are addressing Oracle and Sqlserver (since there are no customers yet on H2 and My SQL). OLE DB connection seems to perform better than ODBC, if there a way to use OLE DB connection and dynamically alter the connection string at run time to connect to Oracle or Sql. What is the best and simple way to achieve this.

Thanks,

lm