public void setDummyOps(List<HashTableDummyOperator> dummyOps) {
    if (this.dummyOps != null && !this.dummyOps.isEmpty()
        && (dummyOps == null || dummyOps.isEmpty())) {
      LOG.info("Removing dummy operators from " + name + " " + this.getClass().getSimpleName());
    }
    this.dummyOps = dummyOps;
  }
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