2.1 Compatibility, Upgrading, Downgrading, and Installation

These sections describe compatibility, upgrading, downgrading, and installation topics for Oracle Database 18c .

2.1.1 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.