private static boolean isIcebergTable(Map<String, String> tblProps) {
    return AlterTableConvertOperation.ConversionFormats.ICEBERG.properties().get(META_TABLE_STORAGE)
        .equalsIgnoreCase(tblProps.get(META_TABLE_STORAGE));
  }
Throw an error if the user tries to use the DDL with
hive.internal.ddl.list.bucketing.enable set to false.
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java