Programmer's Guide Changes in This Release for Oracle C++ Call Interface Programmer's Guide Changes in This Release for Oracle C++ Call Interface Programmer's Guide This preface contains:Changes in Oracle Database 12c Release 2 (12.2) Changes in Oracle Database 12c Release 2 (12.2) The following are changes in Oracle C++ Call Interface Programmer's Guide for Oracle Database 12c Release 2 (12.2). This section includes the following topics: New Features New Features There are no new features in this release.