private void echo(String[] params) throws Exception {
    String command = "echo";
    try {
      writeTestOutput("ECHO " + Joiner.on(" ").join(params));
    } catch (Exception e) {
      writeTestOutput("Caught exception running " + command + ": " + e.getMessage());
      throw new Exception("Cannot run " + command + ": " + e.getMessage());
    }
  }
Echo the parameters given to the command.
@param params parameters which will be echoed
ql/src/java/org/apache/hadoop/hive/ql/processors/ErasureProcessor.java