docs: @Override
      public void run() {
          try {
              VoltTable partitionKeys = null;
              partitionKeys = m_client.callProcedure("@GetPartitionKeys", "INTEGER").getResults()[0];
  
              while (partitionKeys.advanceRow()) {
                  m_client.callProcedure(new NullCallback(), "DeleteOldAdRequests",
                          partitionKeys.getLong("PARTITION_KEY"),
                          m_expiredAgeInSeconds);
              }
  
              m_client.callProcedure(new NullCallback(), "DeleteExpiredBids");
          }
          catch (IOException | ProcCallException ex) {
              ex.printStackTrace();
          }
      }