presto-postgresql/src/main/java/io/prestosql/plugin/postgresql/PostgreSqlClientModule.java/PostgreSqlClientModule/getConnectionFactory
class PostgreSqlClientModule:    @Provides
    @Singleton
    @ForBaseJdbc
    public ConnectionFactory getConnectionFactory(BaseJdbcConfig config, CredentialProvider credentialProvider)
    {
        return new DriverConnectionFactory(new Driver(), config, credentialProvider);
    }