Sourced from hibernate-core's releases.

Hibernate ORM 5.2.0

5.2.0 includes many improvements and bug-fixes. For a complete list of changes, see https://hibernate.atlassian.net/projects/HHH/versions/23150/tab/release-report-done.

Many of the changes in 5.2.0 have important ramifications in terms of both usage and extension. Be sure to read the 5.2 Migration Guide for details.

Below is a discussion of the major changes.

Java 8 baseline

5.2 moves to Java 8 as its baseline. This means:

• The hibernate-java8 module has been removed, and that functionality has been moved into hibernate-core.
• Native support for Java 8 date/time types as Query parameters.
• Support for streaming (java.util.stream.Stream) query results.
• Support for java.util.Optional as return from methods that may return null.
• Leveraging Java 8 "default methods" when introducing new methods to extension points.

Consolidating JPA support into hibernate-core.

That effectively means that the hibernate-entitymanager module no longer exists. Its functionality being consumed into hibernate-core.

JCache support

Support for using any JCache-compliant cache impl as a second-level caching provider.

Session-level batch size support

Support has been added for specifying a batch size for write operations per Session.

Sourced from hibernate-core's changelog.

Changes in 5.4.24.Final (November 17, 2020)

https://hibernate.atlassian.net/projects/HHH/versions/31892

** Bug * [HHH-14333] - Pessimistic Lock causes FOR UPDATE on outer join statements * [HHH-14329] - DirtinessTracker usage for enhanced entities doesn't respect mutable types * [HHH-14322] - HBM many-to-one property-ref broken since 5.3.2 due to HHH-12684 * [HHH-14317] - Avoid closing datasource in AgroalConnectionProvider if datasource is not initialized * [HHH-14316] - Avoid accessing state in DriverManagerConnectionProviderImpl if null * [HHH-14312] - Padded batch style entity loader ignores entity graph * [HHH-14310] - Document hibernate.query.in_clause_parameter_padding * [HHH-14288] - Complex batch insert query stopped to work * [HHH-14279] - Broken 'with key(...)' operator on entity-key maps * [HHH-14276] - Nested ID class using derived identifiers fails with strange AnnotationException: unable to find column reference in the @MapsId mapping: game_id * [HHH-14257] - An Entity A with a map collection having as index an Embeddable with a an association to the Entity A fails with a NPE * [HHH-13310] - getParameterValue() not working for collections

** Improvement * [HHH-14332] - Make it easier for Quarkus SPI to avoid loading XML * [HHH-14325] - Add Query hint for specifying "query spaces" for native queries * [HHH-14158] - Upgrade Javassist to the latest version

** Task * [HHH-14324] - Add .gradletasknamecache to .gitignore * [HHH-14309] - Improve BulkOperationCleanupAction#affectedEntity * [HHH-14225] - CVE-2020-25638 Potential for SQL injection on use_sql_comments logging enabled

Changes in 5.4.23.Final (November 01, 2020)

https://hibernate.atlassian.net/projects/HHH/versions/31887

** Bug * [HHH-14279] - Broken 'with key(...)' operator on entity-key maps * [HHH-14275] - Broken link to Infinispan User Guide in Hibernate 5.3 User Guide * [HHH-14260] - Dead links in user guide * [HHH-14259] - HHH-13980 is not merged into 5.4 * [HHH-14249] - MultiLineImport fails when script contains blank spaces or tabs at the end of the last sql statement * [HHH-14247] - Automatic release scripts, wrong Jira release url * [HHH-14227] - Insert statements are not ordered with entities that use inheritance and reference a subclass

** Improvement * [HHH-14305] - Analyse retained heap after bootstrap to trim memory consumption * [HHH-14304] - Replacing eager initialization of LockingStrategy within AbstractEntityPersister * [HHH-14303] - Upgrade to JBoss Loging 3.4.1.Final * [HHH-14302] - Upgrade to Agroal 1.9 * [HHH-14301] - Upgrade to Byte Buddy 1.10.17

• 0b5d3a2 5.4.24.Final
• 33123d2 HHH-14333 Pessimistic Lock causes FOR UPDATE on outer join statements
• 84e37c1 HHH-14332 Make it easier for Quarkus SPI to avoid loading XML related resources
• da8706e HHH-14329 Amend existing DirtyTrackingTest
• 2669848 HHH-14329 consider mutable types always as potentially dirty when using Dirti...
• 5ea0d92 HHH-14329 test case showing that DirtinessTracker usage for enhanced entities...
• c444d5f HHH-14325 - Add Query hint for specifying "query spaces" for native queries
• 49ae7bd HHH-14325 - Add Query hint for specifying "query spaces" for native queries
• fe2230f HHH-14276 Amend style and formatting
• a8fdb4d HHH-14276 Avoid quoting column name for looking up references during composit...
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