I sure would hope you would want to roll back for that

You can set the rollback strategy on the @Transactional annotation, so if you do not want a rollback to it there.
Database operations require transactions. Even if you do not create one the database will create one around that single operation. When this is the case with writes people use autocommit= true. I do not recommend this. I would always use a transaction in your spring code on any operation that writes to the database.