De-supported Features in Oracle RAC 19c
From Oracle RAC 19c two features are De-Supported. One is related to Database Edition and the Other is related to Replication.
1-Oracle RAC 19c is not supported in Oracle Database Standard Edition 2 (SE2).
If you want to upgrade earlier releases version of databases to Oracle Database 19c, you should remove the Oracle RAC functionality before starting the upgrade, or you can upgrade from Oracle Database Standard Edition to Oracle Database Enterprise Edition. Check My Oracle Support Note 2504078.1: De-support of Oracle RAC 19c with Oracle Database Standard Edition 19c
From Oracle Database 19c (19.1), Oracle Streams is De-supported. Oracle Streams is the replication solution for Oracle Database.
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