Now we are going to see how to recover a dropped/truncated table if a standby database exists, and using the flashback feature. We won't make any changes to the primary database and even the flashback feature may be off on the primary database.
Enabling flashback: To perform recovery of an object, flashback must be enabled on the standby database. Ensure MRP is cancelled before enabling flashback.
SQL> alter database recover managed standby database cancel; Database altered. SQL> alter database flashback on; Database altered. SQL> select db_unique_name,flashback_on from v$database; DB_UNIQUE_NAME FLASHBACK_ON --------------- ------------------ INDIA_UN YESOn the alert log, you will get the following:
Thu Dec 20 15:22:21 2012 RVWR started with pid=25, OS id=7900 Thu Dec 20 15:22:24 2012 Allocated 3981120 bytes in shared pool for flashback generation buffer Flashback Database Enabled at SCN 6082371 Completed: alter database...