Object-Relational Developer's Guide Changes in This Release for Oracle Database Object-Relational Developer's Guide Changes in This Release for Oracle Database Object-Relational Developer's Guide This preface contains: Changes in Oracle Database Release 19c, Version 19.1 Changes in Oracle Database Release 19c, Version 19.1 The are no new features in Oracle Database Object-Relational Developer's Guide for Oracle Database release 19c, version 19.1.