Connect to the central database
To connect to the central database, use the SQL instruction specifying the database source and user credentials, as GAS/SSO/GIP authentication does not apply to database user connections.
The application needs to be connected to the central
database:
CONNECT TO dbsource USER dbuser USING pswd
In this SQL instruction, you want to provide the database source, and the user credentials to connect to the database server.
Note that GAS/SSO/GIP user authentication will not automatically allow to establish the SQL connection with the database user, as both use distinct authentication mechanisms.