2.1 Compatibility, Upgrading, Downgrading, and Installation
These sections describe compatibility, upgrading, downgrading, and installation topics for Oracle Database 12c Release 2 (12.2).
Topics:
2.1.1 Oracle REST Data Services (ORDS)
JDK7 is the minimum Java version for Oracle REST Data Services (ORDS).
2.1.2 Core Dump ORA-00600 [8153] Error Encountered After Database Upgrade
A core dump ORA-00600 [8153] error is encountered after the database is upgraded to Oracle Database 12c Release 2 (12.2) and then downgraded back to its original release (reference Bug 20898997).
Always apply the patch for this bug before upgrading the database to Oracle Database 12c Release 2 (12.2).
2.1.3 Downgrading Oracle Database 12c Release 2 (12.2) to Oracle Database 11g Release 2 (11.2.0.3) Results in Errors When Running utlrp.sql
If SQLJ types are present when downgrading from Oracle Database 12c Release 2 (12.2) to Oracle Database 11g Release 2 (11.2.0.3), then the following ORA-00600 error can occur when running utlrp.sql to recompile invalid objects after running catrelod.sql (reference Bug 16230705):
ORA-00600: internal error code, arguments: [16211]Apply the patch for this bug and recompile the type using the ALTER TYPE COMPILE statement.