I doubt this is correct.
First question is, whether this is really bound to identity columns or if that is possible with sequences aswell. I am asking this because ORM doesn't seem to differenciate when calling this mehtod on `BasicEntityPersister::getInsertSQL()`.
Second question is (in case it is reall yonly supported on identity capable platforms) whether this should rather check for `supportsIdentityColumns()` because a platform might support both identity and sequence and then this might not cover all platforms.