Hibernate ORM 5.4.20 Release Notes and Overview

Hibernate is an object‑relational mapping solution for the Java language. It is free and open‑source software released under the GNU LGPL. It provides a convenient framework for mapping an object‑oriented domain model to traditional relational databases.

Hibernate is currently the most popular persistence layer framework in Java development and is now owned by JBoss.

Its design goal is to free software developers from a large amount of repetitive persistence‑layer programming. Whether starting from a design draft or an existing legacy database, developers can adopt Hibernate.

Hibernate not only handles the mapping from Java classes to database tables (including mapping Java data types to SQL data types) but also provides an object‑oriented query mechanism, greatly reducing development time spent on manual SQL and JDBC handling.

Recently, Hibernate ORM 5.4.20 was released, with the main fixes and improvements as follows:

Defects

[HHH-13974] - Ignoring FlushMode set via SessionBuilder#flushMode()

[HHH-14109] - Fix issue where IN clause parameters are not populated when parameters are limited by two numbers and an IN expression

[HHH-14124] - Fix issue where fetch graph cannot be correctly applied to query results beyond the first result

[HHH-14129] - Fix failure to save bidirectional relationships when using @NotNull injection

Tasks

[HHH-14033] - SQL script parsing issue with multi‑line comments

[HHH-14126] - Add CockroachDB to DefaultDialectSelector and update corresponding documentation and dialect

[HHH-14143] - Add detection of illegal concurrent use of LogicalConnectionManagedImpl

[HHH-14144] - Explicitly set localized assertions for components and test suites

Improvements

[HHH-14133] - Fix error in user guide example code for “second‑level cache”

[HHH-14137] - Improve performance of empty‑string checks

[HHH-14142] - Change StatelessSessionImpl function type to public