@Override
                                                   public String toString() {
                                                     return "{huge}";
                                                   }
NOTE:<br>
1. HiveCost normalizes cpu and io in to time.<br>
2. CPU, IO cost is added together to find the query latency.<br>
3. If query latency is equal then row count is compared.
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/cost/HiveCost.java