Returns help information for Replication Agent commands.
ra_help
This command returns help for all Replication Agent commands.
ra_help pdb_gen_id
This command returns help for the pdb_gen_id command.
If ra_help is invoked with no option, it returns help information for all Replication Agent commands.
If ra_help is invoked with the command option, it returns help information only for the specified command.
The ra_help command is valid when the Replication Agent instance is in the Admin, Replicating, or Replication Down state.