public void setFooterScan() {
    basicStatsNoJobWork = new BasicStatsNoJobWork(table.getTableSpec());
    basicStatsNoJobWork.setStatsReliable(getStatsReliable());
    footerScan = true;
  }
Stats Work, may include basic stats work and column stats desc
ql/src/java/org/apache/hadoop/hive/ql/plan/StatsWork.java