Why would I not need an ORM in a functional language like Scala?

From the link:

“I don't have a deep understanding of how to use functional programming to create a complete application (that's why I intend to use Scala so that I can understand this incrementally, since it combines OO + Functional), so I can't figure out why I would not need an ORM with a functional language and what would be the functional approach to tackling persistence of the domain model. A DDD approach for the business logic still makes sense with Scala, doesn't it?”