As per https://in.relation.to/2022/05/25/hibernate-orm-602-final:

This release introduces a few minor improvements as well as bug fixes.

Optimisation

We have improved how the LazyAttributeLoadingInterceptor is dealing with lazy fields, this makes its processing a bit more efficient and saves a bit of memory as well (see HHH-15274).

Full list of changes in this version:

Bug

HHH-15297 Invalid Automatic-Module-Name org.hibernate.orm.community-dialects

HHH-15293 CockroachDB BYTES type does not have a length specification

HHH-15291 ClassCastException Regression in CriteriaBuilder

HHH-15286 Query with a Composite Identifier (@IdClass) throws an exception

HHH-15285 Calling getJavaType() of @ElementCollection with basic types returns wrong type

HHH-15283 NullPointerException from EntityManager.createNamedNativeQuery(…)

HHH-15279 NPE with Id on OneToOne referencing entity with multi-level EmbeddedId

HHH-15278 NPE when NULL is used in a query projection

HHH-15270 Inconsistent precedence of orm.xml implicit catalog over "default_catalog" in XML-mapped entities

HHH-15269 Update NativeQuery unable to use h-schema placeholder, just emits placeholder contents into SQL

HHH-15267 Some cache objects aren't implement Serializable interface

HHH-15266 NullPointerException on

HHH-15265 SchemaExport.execute does not add the configured schema to comments

HHH-15263 @NamedQuery is not supported with UPDATE statement

HHH-15260 Criteria query is unable to determine TableReference when combining subquery with join

HHH-15258 Orphan removal for OneToMany relations is broken when used with GenerationType.IDENTITY

HHH-15256 Query NPE when using ":param IS NULL" with a Left Join

HHH-15255 Fix org.hibernate.orm.test.batch.BatchTest

HHH-15153 @OneToOne does not support @EmbeddedId

HHH-15134 Update a bytecode enhanced Entity with a Version attribute causes OptimisticLockException

HHH-15010 @CreationTimestamp and @UpdateTimestamp documentation have an incomplete list of supported field types

Improvement

HHH-15292 escape special html chars in JavaDoc

HHH-15259 Explicitly add JavaDoc to make @deprecated hint visible in Eclipse

Task

HHH-15274 Small optimisation for how LazyAttributeLoadingInterceptor is dealing with lazy fields