Can somebody little bit change module to connect only to Oracle by oci_connect?

Good day, in my task I can't user module Oracle driver from drupal.org.
But I need to import date from external database Oracle

How difficult is it to fix the module so that it connects only to a certain database using an OCI_CONNECT and extracts the necessary data

Those. let even there will be no choice of a database, and within the code to write