[ceronman]

Thanks for sharing your experience. I have worked in both kind of projects. Both very big and heavy based in database access. One using Hibernate and one using plain SQL. We've had considerably more problems with the added complexity of Hibernate.

Hibernate does not save you from writing queries. You are still writing queries, just in a language different than SQL (e.g. JPA). It's an abstraction layer. The problem is that this abstraction is very leaky, so if you really want to write performant code with Hibernate you do need to understand how SQL and your database works. And if you really understand how it works, you end up realizing that the abstraction is kinda pointless because SQL is already a really fine abstraction over your database.

And if you need to scale, for example working with a replication setup with multiple db servers and having to deal with eventual consistency, then Hibernate really complicates things.

I think Hibernate is a good example of something that makes things easier at the beginning. At the cost of enormous complexity and difficulty in the long term.

[le-mark]

Let's be clear, this discussion applies to all ORM's not just hibernate. And yes, any team that adopts an ORM hammer and attempts to use it for all database access, is going to have a bad time. Use ORMs for CRUD, for anything else, use SQL. Hibernate actually makes this really easy.

Gavin King:

Well in fairness, we used to say it over and over again until we were blue in the face back when I was working on Hibernate. I even remember a number of times getting called into a client site where basically my only role was to give the team permission to use SQL for a problem that was clearly unsuited to ORM. To me it's just a no-brainer that if ORM isn't helping for some problem, then use something else. [1]

[1] https://www.reddit.com/r/programming/comments/2cnw8x/what_or...

[gerbilly]

I think ORMs help the most when you have a lot of entities and you need to enable CRUD operations on them.

By all means you can use a combination of raw SQL and an ORM.