JPA Inheritance vs Composition Spring Boot Example

1. Introduction Inheritance is an “IS-A” type of relationship in object-oriented programming (OOP). Inheritance is tightly coupled since child classes…

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Troubleshooting Hibernate’s UnknownEntityException: Could Not Resolve Root Entity

One common issue developers may face with Hibernate is the UnknownEntityException, particularly the message: Could not resolve root entity. This…

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Fixing the JPA “Could Not Determine Recommended JdbcType for Class” Error

When working with Hibernate and Jakarta Persistence API (JPA), you might encounter the error: Could not determine recommended JdbcType for…

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Hibernate load() and get(): What’s the Difference?

Two commonly used methods in Hibernate for retrieving objects from the database are load() and get(). Though they appear similar,…

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Querydsl vs. JPA Criteria

Querydsl and JPA Criteria are widely used frameworks for creating type-safe queries in Java. Both offer methods to express queries…

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Hibernate Subselect Annotation

1. Introduction Hibernate is an open source object relational mapping (ORM) tool that provides a framework to map object-oriented domain…

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How to get Type-Safe and Intuitive Hibernate/JPA Queries by Leveraging Java Streams

A large proportion of Java database applications are using Hibernate/JPA to bridge the gap between Java and SQL. Until recently,…

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Extend Hibernate to Handle Java Stream Queries

The Java Stream API released in Java 8 has proven itself to be an efficient, terse yet intuitive way of…

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Difference between save vs persist and saveOrUpdate in Hibernate

Save vs. saveOrUpdate vs. persist in Hibernate What is the difference between save and saveOrUpdate or Difference between save and…

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