I just stumbled upon this as jOOQ / JPA / Hibernate integration tests currently fail for Vertica.

I agree that you're not in a rush to support this dialect. On the other hand, the dialect is more popular than others currently supported by Hibernate, at least according to this ranking:
http://db-engines.com/en/ranking

I'm thinking of:

• CUBRID
• FrontBase
• Ingres
• Mimer
• Pointbase
• Sybase SQL Anywhere
• TimesTen

You get the idea

On the other hand, I wonder what Hibernate's official integration statement with respect to column stores is, as column stores are an analytics-heavy domain, with little use for CRUD. Does it make sense at all to support column stores in Hibernate?