public static boolean isIcebergStatsSource(HiveConf conf) {
    return conf.get(HIVE_ICEBERG_STATS_SOURCE.varname, HiveMetaHook.ICEBERG)
            .equalsIgnoreCase(HiveMetaHook.ICEBERG);
  }
Get the fully qualified name in the node.
E.g. the node of the form ^(DOT ^(DOT a b) c) will generate a name of the form "a.b.c".
ql/src/java/org/apache/hadoop/hive/ql/ddl/DDLUtils.java