Renamed script to reflect the fact that it can be run after any 2.1.14

upgrade, and modified to work around an Oracle 'feature' that
makes the procedure slower and slower over time.

upgrades/cns_2.1.14-2_post-upgrade.sql → upgrades/cns_2.1.14_post-upgrade.sql

 /******************************************************************************
- *                 cns_2.1.14-2_post-upgrade.sql
+ *                 cns_2.1.14_post-upgrade.sql
  *
  * This file is part of the Castor project.
  * See http://castor.web.cern.ch/castor
@@ -71,6 +71,26 @@ BEGIN
   -- yield to normal activity
   DBMS_LOCK.SLEEP(1);
   END LOOP;
+  -- drop temporary job to keep the index healty
+  dbms_scheduler.stop_job('INDEXREBUILDJOB', force=>TRUE);
+  dbms_scheduler.drop_job('INDEXREBUILDJOB');
+END;
+/
+
+/* Create a temporary job to keep the index healty. This is needed to work around
+ * an Oracle 'feature' that makes RANGE SCANs less and less efficient over time,
+ * thus making the above procedure slower and slower.
+ */
+BEGIN
+  DBMS_SCHEDULER.CREATE_JOB(
+      JOB_NAME        => 'INDEXREBUILDJOB',
+      JOB_TYPE        => 'PLSQL_BLOCK',
+      JOB_ACTION      => 'BEGIN EXECUTE IMMEDIATE ''ALTER INDEX I_fmd_stagertime_null REBUILD''; END;',
+      JOB_CLASS       => 'CASTOR_JOB_CLASS',
+      START_DATE      => SYSDATE + 1/3600,
+      REPEAT_INTERVAL => 'FREQ=HOURLY; INTERVAL=12',
+      ENABLED         => TRUE,
+      COMMENTS        => 'Rebuild an index to prevent degradation');
 END;
 /