private String getComment(Table table) {
    String comment = table.getProperty("comment");
    return (comment != null) ? "COMMENT '" + HiveStringUtils.escapeHiveCommand(comment) + "'" : "";
  }
Struct fields are identifiers, need to be unparsed.
ql/src/java/org/apache/hadoop/hive/ql/exec/DDLPlanUtils.java