Oracle HA String?


I am unable to add an oracle high availability string with load balance and fail over clauses etc. as an oracle data source; something like:


I thought maybe defining it in a tnsnames.ora and making it visible to the environment via tns_admin would allow it to forgo the direct host/port field requirements and just rely on the tns entry but it doesn’t seem to be working. Is it just not supported or am I missing something obvious?

Any help is appreciated