public void verifyDdlParam(String param, String name)
    throws BadParam {
    verifyParam(param, name);
    Matcher m = DDL_ID.matcher(param);
    if (!m.matches()) {
      throw new BadParam("Invalid DDL identifier " + name);
    }
  }
Verify that the parameter exists and is a simple DDL identifier
name.  Throw an exception if invalid.

Bug: This needs to allow for quoted ddl identifiers.
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/Server.java