Failover connect string for pluggable databases (primary RAC + standby)

@(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = host1-vip)(PORT = 1521))(ADDRESS = (PROTOCOL = TCP)(HOST = host2-vip)(PORT = 1521))(CONNECT_DATA = (SERVER = DEDICATED)(SERVICE_NAME = pdbdt)))

host1

SQL> show pdbs
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDBX                           READ WRITE NO
         4 PDBY                           READ WRITE NO
         5 PDBDT                          MOUNTED

host2

SQL> show pdbs
    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDBX                           READ WRITE NO
         4 PDBY                           READ WRITE NO
         5 PDBDT                          READ WRITE NO

$ sqlplus system/**********@(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = host1-vip)(PORT = 1521))(ADDRESS = (PROTOCOL = TCP)(HOST = host2-vip)(PORT = 1521))(CONNECT_DATA = (SERVER = DEDICATED)(SERVICE_NAME = pdbdt)))
SQL*Plus: Release 19.0.0.0.0 - Production on Thu Sep 24 14:39:26 2020
Version 19.8.0.0.0
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