Oracle Database 11 g - Online Public Access Catalog

166 CHAPTER 3 ■ DATABASE ADMINISTRATIONThe following example shows how to run a job in the two database roles: the primary databaserole and the logical standby database role. We create two copies of a job and assign differentvalues for the database_role attribute (primary and logical standby) to each of the copies.If you want to run a job in both roles, you can do so by copying the job and then changingthe database_role attribute value to the required value (primary or logical standby) after enablingthe copied job.In the following example, we create a job named test_primary on the primary database. Wethen make a copy of this job and change the database_role attribute value to logical standby.When the primary database becomes a logical standby database, the copied job will run as perthe schedule.begindbms_scheduelr.create_job(job_name => 'test_primary',program_name => 'test_prog',schedule_name => 'test_sched');dbms_scheduler.copy_job('test_primary','test_standby');dbms_scheduler.enable(name=>'test_standby');dbms_scheduler.set_attribute('test_standby','database_role','logical_standby');end;/You can query the DBA_SCHEDULER_JOB_ROLES view to ensure that the job roles areswitched, as shown here:SQL> select job_name,database_rolefrom dba_scheduler_job_roles;JOB_NAMEDATABASE_ROLE------------- ----------------TEST_PRIMARYPRIMARYTEST_STANDBYLOGICAL STANDBYThe query reveals that our primary and standby jobs are assigned the correct job roles.