public void setBasicStatsState(State basicStatsState) {
    updateBasicStatsState();
    if (this.basicStatsState.morePreciseThan(basicStatsState)) {
      this.basicStatsState = basicStatsState;
    }
  }
Statistics. Describes the output of an operator in terms of size, rows, etc
based on estimates.
ql/src/java/org/apache/hadoop/hive/ql/plan/Statistics.java