Connecting Contao with Oracle or Contao as a helpdesk application

Hello,

Is it possible to connect Contao with other Databases, e.g. Oracle?

I am interested to know whether is possible to make a helpdesk website with Contao. But, in that case it would be neccessary to integrate it with Oracle Database which my company uses. This is important mostly for log in purposes, where users defined in Oracle database would use Contao portal as helpdesk application.

One possibility I think of, is to intercept data when user tries to log in in Contao. When he enter his Oracle username/password some php function could check if it exists in Oracle and then returns his appropriate Contao front-end user privileges.

I am aware this would be a huge project with lots of hardcoding, time and effort consuming. Integration with Oracle, reporting, etc.

What are your toughts?