That depends on how the fair use argument goes. The downside of such arguments is that you generally have to argue that in court. I tend to believe that Oracle would prefer to leave this untested, as they'd probably benefit more from leaving it uncertain than to spend a ton of money litigating it with a chance of blowing up the whole scheme.

I mean, given that this is a trivial work with no discernible literary merit, a full quotation is arguably a reasonable step in order to fully demonstrate the triviality of the work.

The sole purpose of this poem, given that it's hidden away deep in the plumbing of the system where almost nobody ever sees it, is to dissuade people from making something that is interoperable with Oracle's DBs, after all.

One normally displays art that they're proud of where people can appreciate it, rather than making it a technical requirement for a machine to recite bad poetry to a database before the database will deign to respond.

It could be worse, though. Just imagine if this was Vogon poetry...

You can make a very strong argument for fair use in this case. Oracle knows this; if anything, their lawyers are not idiots.