public boolean getIsVectorizationReduceSinkNativeEnabled() {
    return isVectorizationReduceSinkNativeEnabled;
  }
VectorReduceSinkDesc.

Extra parameters beyond ReduceSinkDesc just for the VectorReduceSinkOperator.

We don't extend ReduceSinkDesc because the base OperatorDesc doesn't support
clone and adding it is a lot work for little gain.
ql/src/java/org/apache/hadoop/hive/ql/plan/VectorReduceSinkDesc.java