Soft delete rows with Hibernate’s @SoftDelete: see the UPDATE that replaces DELETE, choose the DELETED, ACTIVE or TIMESTAMP strategy, read and restore deleted rows with native SQL, and avoid unique constraint errors.
Learn to track or audit the @Entity creation and updation timestamps using Spring Data annotations, JPA lifecycle callbacks, Hibernate and Envers library.
A JPA native DELETE query runs plain SQL with executeUpdate(). Learn createNativeQuery() and @NamedNativeQuery, foreign key errors and their fixes, and why callbacks, cascades and @SoftDelete are skipped.
A JPA native UPDATE query runs our own SQL with executeUpdate() and returns the row count. Learn createNativeQuery() and @NamedNativeQuery, why loaded entities go stale, and how to declare the changed tables.
A JPA native query sends our own SQL to the database and still returns managed entities, scalar values, Tuples or records. Learn createNativeQuery(), @NamedNativeQuery, result set mappings, joins and paging with Hibernate 7.
Hibernate’s @Immutable annotation stops UPDATE statements for an entity, blocks changes to a collection and, since Hibernate 7, fails HQL update queries by default. We compare it with updatable = false, read-only queries, @Subselect and records.
A reference of the JPA annotations used on almost every Hibernate entity, from @Entity and @Column to @Embedded, @Version and @Convert, each with the DDL Hibernate 7.4 generates for it.
Map a natural id such as a license plate with Hibernate’s @NaturalId, load entities with em.find(…, KeyType.NATURAL), handle mutable and composite natural ids, and cache lookups with @NaturalIdCache, with the SQL and statement counts from Hibernate 7.4.
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