Have we lost the Oracle driver?

[Ben Rubinstein]

A long time ago I used to access Oracle directly from a LiveCode app.

For some years now I've only done this via ODBC, though I don't recall why 
that changed.

The Dictionary entry for revOpenDatabase lists five variants ("mysql", "odbc", 
  "sqlite", "postgresql", "oracle"); but the User Guide (p. 303) lists three 
plus ODBC.

Now I'm trying to access an Oracle database directly again (in the IDE), and 
when my code hits
	revOpenData("oracle", ....)

it breaks into the debugger as if there was a breakpoint on that statement - 
there isn't; it switches to but the "Errors" tab says "No errors found".

However after 'stepping', it halts altogether and the errors tab says

	execution error at line n/a (External handler execution error: 
revdberr,driver not licensed for this edition)

As I understand it there is now only one edition (with a buffet of deployment 
platforms), the Standard Plan, and my account says that I have a "LiveCode 
Professional" license (I admit that I am thoroughly confused about plans, 
licenses etc). Oracle isn't mentioned in the "Pro Feature Pack" either.

Is Oracle supported? If so what do I need to do to access that?

TIA,

Ben