Enhancements:

• Apply custom ResultHandler to CURSOR type OUT parameter. #493
• Substitute variables in attribute values of included SQL fragments. #1069
• BatchExecutor now closes each statement immediately after execution. #1110
• It is now possible to use a static method as SQL provider. #1131
• SQL provider method can now return CharSequence instead of String. #1134
• Add resource path to the exception message when parsing XML mapper failed. #1172

Bug fixes:

• Registering type handler against HashMap causes ClassCastException. #1089
• Unable to register TypeHandler once TypeHandlerRegistry.hasTypeHandler is called. #1177
• Serializing and deserializing cached objects causes NullPointerException. #1084
• Invalid error message 'Two methods with same method signature but not providing classes assignable?' in System.err. #929

There should be no backward incompatible change since 3.4.5. Follow this link to see the full list of changes.