Hibernate 3.1.1 Released

Hibernate is a powerful, high performance object/relational persistence and query service.

Hibernate 3.1.1 Released

Hibernate 3.1.1 Released

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Hibernate is a powerful, high performance object/relational persistence and query service. Hibernate lets you develop persistent classes following object-oriented idiom - including association, inheritance, polymorphism, composition, and collections. Hibernate allows you to express queries in its own portable SQL extension (HQL), as well as in native SQL, or with an object-oriented Criteria and Example API.

Hibernate 3.1.1 has been released with new features and promises on Jan 13, 2006. This maintenance release focused on bug fixes and improvements, especially regarding:

  • SQL Server support
  • DML-style HQL (UPDATE, DELETE, INSERT INTO... SELECT)
  • Native Query support
  • Connection handling

Changes:

  • DML-style HQL queries and associations
  • FORWARD_ONLY ScrollableResults#next() throw GenericJDBCException
  • Set entity in HQL query without prefix -> incorrect SQL
  • Session.createFilter(...).iterate() results in bogus column names for result set extraction
  • float/double literals not sent to the database correctly
  • SchemaUpdate : java.sql.SQLException: You cannot commit during a managed transaction!
  • org.hibernate.util.SimpleMRUCache keeps a soft reference to the cache key, so cached values get collected prematurely
  • ForeignGenerator does not handle transient entities with an entity-name properly
  • Mapped <component> generated column names incorrect with ImprovedNamingStrategy
  • HQL delete statement problem due to oracle lacking table aliases in delete clause
  • creating temporary table for bulk delete will commit current transaction in managed environment such as J2EE

Improvements:

  • Native SQL return-property mapping doesn't support dot-syntax in return-property for components
  • Defensive checking of session status
  • query.getReturnTypes inconsistent
  • better handling of borrowed connections in non-ON_CLOSE release semantics
  • schemaupdate does not handle TableHiLoGenerator
  • empty property name in mapping file gives imcomprehensible error message
  • ANSI-SQL trim function for SQLServer
  • ANSI-SQL mod function for SQLServer
  • ANSI-SQL bit_length function for SQLServer
  • <return-scalar name="blah"/> should be possible
  • set autodiscovery flag for SQLQueries when resultsetmappings are used
For more details check out the release notes.

Hibernate 3.1 introduced non OLTP features as well as better environment integration:
  • Custom strategy for session handling through CurrentSessionContext including 2 default implementations (JTA based and ThreadLocal based session handling)
  • more natural and aggressive connection handling in J2EE and J2SE environments
  • command-oriented API (StatelessSession API) for operations on huge number of objects
  • bulk UPDATE, DELETE, INSERT INTO ... SELECT for multi-table entities
  • "extra lazy" collections for huge collection handling
  • use of join fetch on collection through scrollable resultsets through break processing
  • database generated properties (including database timestamps)
  • additional ON clauses for joins
  • dirty checking short-cuts for instrumented classes
Hibernate 3.1.1 can be downloaded from here.

Tutorials

  1. Why hibernate is used?
  2. Hibernate Native SQL Example
  3. Hibernate Update Query
  4. Hibernate Delete Query
  5. Hibernate Count Query
  6. Writing First Hibernate Code
  7. Running First Hibernate 3.0 Example
  8. Hibernate Book
  9. Understanding Hibernate O/R Mapping
  10. Using Hibernate to generate id incrementally
  11. Hibernate Query Language
  12. Preparing table for HQL Examples
  13. Writing ORM for Insurance table
  14. HQL from clause Example
  15. Hibernate Select Clause
  16. HQL Where Clause Example
  17. Hibernate Architecture
  18. HQL Group By Clause Example
  19. hibernateTemplate-Order Results
  20. Hibernate Criteria Query Example
  21. Hibernate How To
  22. Hibernate Quickly
  23. Hibernate 3.1.2 Released
  24. HQL Order By Example
  25. Hibernate 3.1.3 Released
  26. Hibernate 3.1.1 Released
  27. Introduction to Hibernate 3.0
  28. Complete Hibernate 3.0 and Hibernate 4 Tutorial
  29. Hibernate Avg() Function (Aggregate Functions)
  30. Hibernate Max() Function (Aggregate Functions)
  31. Hibernate Min() Function (Aggregate Functions)
  32. Hibernate Criteria Expression (eq)
  33. Hibernate Criteria Expression (lt)
  34. Hibernate Criteria Expression (le)
  35. Hibernate Criteria Expression (gt)
  36. Hibernate Criteria Expression (ge)
  37. Hibernate Criteria Expression (and)
  38. Hibernate Criteria Expression (or)
  39. Hibernate Projections (rowCount or countDistinct)
  40. Hibernate Projection Count