public void addDummyOp(HashTableDummyOperator dummyOp) {
    if (dummyOps == null) {
      dummyOps = new LinkedList<HashTableDummyOperator>();
    }
    dummyOps.add(dummyOp);
  }
BaseWork. Base class for any "work" that's being done on the cluster. Items like stats
gathering that are commonly used regardless of the type of work live here.
ql/src/java/org/apache/hadoop/hive/ql/plan/BaseWork.java