@Override
  public void replaceTabAlias(String oldAlias, String newAlias) {
    super.replaceTabAlias(oldAlias, newAlias);
    ExprNodeDescUtils.replaceTabAlias(getConf().getColumnExprMap(), oldAlias, newAlias);
    ExprNodeDescUtils.replaceTabAlias(getConf().getBucketCols(), oldAlias, newAlias);
    ExprNodeDescUtils.replaceTabAlias(getConf().getPartitionCols(), oldAlias, newAlias);
    ExprNodeDescUtils.replaceTabAlias(getConf().getKeyCols(), oldAlias, newAlias);
  }
@return the name of the operator
ql/src/java/org/apache/hadoop/hive/ql/exec/ReduceSinkOperator.java