How to inherit properties from a base class entity using @MappedSuperclass with JPA and Hibernate
Introduction In this article, we are going to see how @MappedSuperclass can help us reuse the @Id mapping of a JPA and Hibernate entity so that it won’t have to be declared on each and every entity.
The best way to map a @NaturalId business key with JPA and Hibernate
Introduction In this article, you are going to learn what the Hibernate natural id is and how you can use it to fetch entities based on a business key. As I explained in this free chapter of my book, Hibernate offers many benefits over standard JPA. One such example is the @NaturalId mapping. In this article, you are going to see what is the best way to map a natural business key when using Hibernate.
How does Hibernate handle JPA Criteria API literals
Introduction The JPA specification is like a Java interface, However, when it comes to performance, implementation details matter a lot. That’s why, even if you use the JPA standard, you still need to know how the underlying provider implements the standard specification. For instance, if we take this tweet from Gareth Western: We can clearly see that there is an issue in the way literals might be handled by Hibernate when executing a Criteria API query. Therefore, in this article, we are going to see how literals are handled by Hibernate and… Read More
9 High-Performance Tips when using MySQL with JPA and Hibernate
Introduction Although there is an SQL Standard, every relational database is ultimately unique, and you need to adjust your data access layer so that you get the most out of the relational database in use. In this article, we are going to see what you can do to boost up performance when using MySQL with JPA and Hibernate.
How to solve the PostgreSQL :: cast operator issue with JPA and Hibernate
Introduction While answering questions on the Hibernate forum, I stumbled on the following question regarding the PostgreSQL :: cast operation used in a JPA and Hibernate entity query. Since it’s a very interesting use case, I decided to turn the answer into a dedicated blog post.
The hibernate-types open-source project is born
Introduction Recently, I got a very interesting request from one of my readers. Since I’ve been providing many custom types to support JSON, ARRAY, or nullable Character types, I decided to start a new open-source project to make it easier for you to get these extra Hibernate Types.
The best way to map an Enum Type with JPA and Hibernate
Introduction Recently, I got a very good question on Twitter, and I decided that the best way to answer it is with a new article. In this article, we are going to see how various ways to map an Enum using JPA and Hibernate.
The best way to fix the Hibernate “firstResult/maxResults specified with collection fetch; applying in memory!” warning message
Introduction If you’ve been using Hibernate long enough, then you surely must have seen this WARN log message when doing pagination while join-fetching multiple entities. HHH000104: firstResult/maxResults specified with collection fetch; applying in memory! In this article, I’m going to show two ways you can to fix this issue.
How to map a composite identifier using an automatically @GeneratedValue with JPA and Hibernate
Introduction One of my readers asked me to answer the following StackOverflow question. While I already covered the best way to map composite identifiers with JPA and Hibernate, this use case is different because one column is automatically generated.
