In this article, we are going to see how we can bind a custom Hibernate parameter type to a JPA query.
I decided to write this article after one of my
hibernate-types framework users created this very interesting issue on GitHub.
In this article, we are going to see how the Hibernate event listeners work and how you add your custom listeners to intercept entity changes and replicate them to other database tables.
Recently, one of my blog readers asked a very good question on StackOverflow.
Since my main goal as a Hibernate Developer Advocate is to help Java developers get the most out of JPA and Hibernate, I decided that this is a good opportunity to talk about the Hibernate event listener mechanism.
In this article, we are going to see the best way to initialize LAZY proxies and collections when using JPA and Hibernate.
I decided to write this article because there are way too many resources available on the Internet that mislead the reader into using awkward and inefficient practices.
Three years ago, I started working as a Developer Advocate for the Hibernate team at Red Hat.
Each year, I write a new report to summarize the accomplishments for the Hibernate project and its community. If you’re curious about the previous year reports, check out the
In this article, we are going to see how you can execute SQL functions with multiple parameters in JPQL queries with Hibernate. I recently stumbled on this requirement while answering this StackOverflow question which is a never-ending source of inspiration for articles on my blog.
In this article, we are going to how the JPQL DISTINCT keyword behaves depending on the underlying entity query type.
In this article, you are going to learn how to map cameCase entity properties (e.g.
phoneNumber) to snake_case column names (e.g.
phone_number) using a Hibernate naming strategy.
While you could achieve the same goal with the
name attribute of JPA
@Column annotation, it’s much more convenient to use a custom Hibernate strategy to apply this naming convention consistently.
Every entity query, be it JPQL or Criteria API, needs to be parsed and compiled to an AST (Abstract Syntax Tree) in order to generate the associated SQL query. The entity query compilation takes time, as explained in this article so Hibernate provides a
QueryPlanCache to store already-compiled plans.
Starting with Hibernate 5.4, the Hibernate
Statistics mechanism allows you to monitor the Query Plan Cache and this article will show you how to take advantage of this feature to speed up IN query performance.
For an introduction about the Hibernate Statistics mechanism, check out this article.
In this article, you are going to learn why overwriting entity collections is an anti-pattern and how you can merge collections both effectively and efficiently with JPA and Hibernate.
The reason I decided to write this article is that I’ve been this question asked over and over and over again.
In this article, we are going to see how you can map the
java.time.Month with both JPA and Hibernate.
As explained in this article, JPA 2.2 supports
OffsetDateTime from the
java.time package. Hibernate has been supporting the Java 8 Date/Time classes since 5.0 via the
hibernate-java8 dependency, but since version 5.2, this dependency was merged with
hibernate-core so you get the
ZonedDateTime types in addition to the ones supported by JPA 2.2.
However, neither JPA nor Hibernate supports the
java.time.Year type out-of-the-box. As you will see, adding support for
java.time.Year is very easy with both standard JPA or Hibernate.