JPA and Hibernate Query setParameter – User Guide

Introduction In this article, I’m going to show you how the JPA Query setParameter method works for basic entity attributes, and how you can use it when dealing with custom Hibernate types. If you ever stumbled on the “column is of type jsonb but expression is of type bytea” PostgreSQL issue and didn’t know how to fix it, then you should definitely read this article.

High-Performance Java Persistence Newsletter, Issue 11

Introduction Welcome to a new issue of the High-Performance Java Persistence Newsletter in which we share articles, videos, workshops, and StackOverflow answers that are very relevant to any developer who interacts with a database system using Java.

How to get the SQL query from JPQL or JPA Criteria

Introduction In this article, I’m going to show you how you can get the auto-generated SQL query from a JPQL or JPA Criteria API entity query.

High-Performance Java Persistence Newsletter, Issue 10

Introduction Welcome to a new issue of the High-Performance Java Persistence Newsletter in which we share articles, videos, workshops, and StackOverflow answers that are very relevant to any developer who interacts with a database system using Java.

How to generate JPA entity identifier values using a database sequence

Introduction In this article, I’m going to show you how you can generate entity identifier values using a database sequence when using JPA and Hibernate. Using a database sequence is the most efficient Hibernate identifier generation strategy, as it allows you to take advantage of the automatic JDBC batching mechanism.

How to fetch a one-to-many DTO projection with JPA and Hibernate

Introduction In this article, I’m going to show you how you can fetch a one-to-many relationship as a DTO projection when using JPA and Hibernate. While entities make it very easy to fetch additional relationships, when it comes to DTO projections, you need to use a ResultTransformer to achieve this goal.

High-Performance Java Persistence Newsletter, Issue 9

Introduction Welcome to a new issue of the High-Performance Java Persistence Newsletter in which we share articles, videos, workshops, and StackOverflow answers that are very relevant to any developer who interacts with a database system using Java.

ManyToOne JPA and Hibernate association best practices

Introduction In this article, I’m going to show you what is the best way to map a ManyToOne association when using JPA and Hibernate. Since the @ManyToOne association is the most common relationship, knowing how to map it properly will have a significant impact on application performance.

How to map Date and Timestamp with JPA and Hibernate

Introduction In this article, I’m going to show you what is the best way to map date and timestamp column types when using JPA and Hibernate. While there are many options to map date and timestamp columns on the Java side, as you will soon see, not all of them are suitable.

High-Performance Java Persistence Newsletter, Issue 8

Introduction Welcome to a new issue of the High-Performance Java Persistence Newsletter in which we share articles, videos, workshops, and StackOverflow answers that are very relevant to any developer who interacts with a database system using Java.