> Currently H2 doesn't support a separate, distinct type LONGVARCHAR. It's just an alias for VARCHAR.

If longvarchar is not supported by H2, I guess Hibernate should not send H2 a create statement using it. It's true that H2 is strange but the inner goal of a Dialect is specifically to deal with database-specific attributes, so IMHO, it's the Hibernate Dialect that should be fixed.

My two cents...