static void setFetchOperatorContext(JobConf conf, List<Path> paths) {
    if (paths != null) {
      StringBuilder buff = new StringBuilder();
      for (Path path : paths) {
        if (buff.length() > 0) {
          buff.append('\t');
        }
        buff.append(StringEscapeUtils.escapeJava(path.toString()));
      }
      conf.set(FETCH_OPERATOR_DIRECTORY_LIST, buff.toString());
    }
  }
Set context for this fetch operator in to the jobconf.
This helps InputFormats make decisions based on the scope of the complete
operation.
@param conf the configuration to modify
@param paths the list of input directories
ql/src/java/org/apache/hadoop/hive/ql/exec/FetchOperator.java