The connection string used for Z Psycopg Database Connection are
exactly the same connection strings required by posgresql tools. The
connection strings are typically of the form:
dbname=database_name user=user_name password=secret_string
host=server_addr port=port_number
or:
dbname=database_name user=user_name password=secret_string port=port_number
to use the unix socket named port_number. See PotsgreSQL
documentation for more options.