1. Database Release Notes
  2. Issues Affecting All Platforms for Oracle Database 19c
  3. Compatibility, Upgrading, Downgrading, and Installation

2.1 Compatibility, Upgrading, Downgrading, and Installation

This section describes compatibility, upgrading, downgrading, and installation topics for Oracle Database 19c.

Parent topic: Issues Affecting All Platforms for Oracle Database 19c

2.1.1 Core Dump ORA-00600 [8153] Error Encountered After Database Upgrade

This topic describes the ORA-00600 error that can occur after a database upgrade.

A core dump ORA-00600 [8153] error is encountered after the database is upgraded to Oracle Database 12c release 2 (12.2) or to Oracle Database 19c 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) or to Oracle Database 19c.

Parent topic: Compatibility, Upgrading, Downgrading, and Installation

2.1.2 Upgrading from Oracle Database 11g Release 2 (11.2.0.4) to 19c to Oracle Database Results in Errors During Upgrade

This topic describes the ORA-08102 error that can occur when upgrading from Oracle Database 11g release 2 (11.2.0.4) to Oracle Database 19c.

In some cases, when altering table WRH$_SEG_STAT to add some columns, you may encounter the ORA-08102 error (reference Bug 28668676). For example:
ALTER TABLE WRH$_SEG_STAT ADD (im_membytes NUMBER DEFAULT 0);
ALTER TABLE WRH$_SEG_STAT ADD (im_membytes NUMBER DEFAULT 0)
*
ERROR at line 1:
ORA-08102: index key not found, obj# 16200, file 2, block 4765 (2)

Download c18.sql and c1202000.sql from the bug and restart the upgrade process.

Parent topic: Compatibility, Upgrading, Downgrading, and Installation

2.1.3 Plugging in an Oracle Database 12.1 Non-CDB to an Oracle Database 12.2 Local Undo CDB

This topic describes undo tablespaces are not plugged in when going from Oracle Database release 12.1 to release 12.2.

When trying to plug in an Oracle Database 12c Release 1 (12.1) non-CDB to an Oracle Database 12c Release 2 (12.2) or higher CDB and local undo is enabled, undo tablespaces are not plugged in.

Workaround:

None.

Parent topic: Compatibility, Upgrading, Downgrading, and Installation