ByThorben JanssenQuite often JPQL is not powerful enough to perform the queries we need in real world projects. In general, this is not an issue because JPA is designed as a leaky abstraction and we can use the full potential of SQL by using native queries or calling stored procedures. The only downside is, that these…
ByThorben JanssenDid you ever ask yourself why a server request took ages on the production system while your local test system was just fine?Well, we all had these situations, and we will have several more of them in the future. In my experience, strange performance drops are often related to slow database queries. But which query…
ByThorben JanssenIf you are a regular reader of this blog, you know that I wrote several articles about features and enhancements introduced with JPA 2.1. One thing that was missing, was a general overview about all the changes. So here it is 🙂The following paragraphs provide a description of the 12 features and enhancements introduced with…
ByThorben JanssenLazy loading of associations between entities is a well established best practice in JPA. Its main goal is to retrieve only the requested entities from the database and load the related entities only if needed. That is a great approach if you only need the requested entities. But it creates additional work and can be…
ByThorben JanssenThis is my second post on Entity Graphs. The first post described the usage of named entity graphs. These can be used to define a graph of entities and/or attributes at compile time that shall be fetched with a find or query method. Dynamic entity graphs do to the same but in a dynamic way. This…