protected boolean isInputFileChangeSensitive(ExecMapperContext mapContext) {
    return !(mapContext == null
        || mapContext.getLocalWork() == null
        || mapContext.getLocalWork().getInputFileChangeSensitive() == false);
  }
Implements the getName function for the Node Interface.

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