Oracle7 Server Distributed Systems Volume II: Replicated Data

Compatibility Issues

This section describes compatibility issues between release 7.3 of the advanced replication option and previous releases.

If you will be upgrading all sites in your replicated environment to release 7.3, you should not find it necessary to make any changes to your existing sites. You should review the documentation on the new features and begin to use them at your convenience.

If you will be upgrading only selected sites in your replicated environment to release 7.3, you need to be aware of the following issues:

It is not necessary to upgrade all sites in a replicated environment to the same release.

If your replicated environment includes sites prior to release 7.3, your object groups cannot span schemas. Your object group name should correspond to a schema name.

Pre-release 7.3 sites can only communicate asynchronously with any other sites in the replicated environment.

Release 7.3 master sites must generate special triggers to support pre-release 7.3 snapshot sites. These triggers are generated automatically by setting the GEN_REP2_TRIGGER flag to TRUE when you call GENERATE_REPLICATION_SUPPORT at the master site.

If you have a release 7.3 master definition site operating in 7.3 compatibility mode, you must also set the DISTRIBUTED flag to TRUE when you call GENERATE_REPLICATION_SUPPORT to ensure that the appropriate generated objects are created at any pre-release 7.3 sites.