public void clearFetchContext() throws HiveException {
      if (segments != null) {
        for (FetchOperator op : segments) {
          if (op != null) {
            op.clearFetchContext();
          }
        }
      }
    }
Implements the getName function for the Node Interface.

@return the name of the operator
ql/src/java/org/apache/hadoop/hive/ql/exec/SMBMapJoinOperator.java