Let Hibernate detect the dialect to use

[snicoll]

Spring Boot detects the dialect to use based on the DataSource. Unfortunately, the defaults in framework are quite conservative and Hibernate is doing a good job at detecting the right dialect anyway.

As suggested in #15342 (comment) we should stop doing that upfront and let Hibernate do its thing.

[viktoriya-kutsarova]

@snicoll If this issue is suitable for contribution, I can try to tackle it.

[snicoll]

Thanks for the offer. The issue is assigned and therefore not opened for contribution. I've assigned myself as there are quite a lot of things to consider.

[trajano]

No I just noticed it now. Since this was closed about 4 months ago I thought it would've been here by now.

Anyway for those who are still stuck on the older version in case they reach here my workaround was

@Component
@Primary
public class CustomHibernateJpaVendorAdapter extends HibernateJpaVendorAdapter {

    @Override
    protected Class<?> determineDatabaseDialectClass(Database database) {
        return null;
    }

}