Hibernate StatelessSession Upsert
Introduction In this article, we are going to see how the Hibernate StatelessSession Upsert method works. As I explained in this article, the UPSERT operation allows you to INSERT a record if there is no such record matching the filtering criteria or to UPDATE it in case the record exists. While many relational database systems offer the standard MERGE command to execute the UPSERT command, the syntax may differ slightly from one database to the other. Therefore, it’s great that Hibernate provides a portable way to achieve this goal.
The best way to map multiple entities on the same table
Introduction In this article, we are going to see what is the best way to map multiple entities on the same table. There are several advantages to mapping multiple entities on the same database table: To avoid loading large columns (e.g., JSON) To avoid N+1 query issues for bidirectional @OneToOne associations Before we start investigating the best way to map multiple entities on the same table, if you wonder why you even need to use one-to-one table relationships, then check out this article first.
Spring Load-Time Weaving
Introduction In this article, we are going to see how Spring load-time weaving works so that you can apply the Hibernate bytecode enhancement mechanism at runtime. Traditionally, the bytecode enhancement mechanism is applied when the project is built using a Maven or Gradle plugin. For more details about the build-time approach, check out this article.
