private List<TransformSpec> getSortTransformSpec(Table table) {
    return table.sortOrder().fields().stream().map(s ->
        IcebergTableUtil.getTransformSpec(table, s.transform().toString(), s.sourceId())
      )
      .collect(Collectors.toList());
  }
Iceberg's optimistic concurrency control fails to provide means for IOW and Insert operations isolation.
Use `hive.txn.ext.locking.enabled` config to create Hive locks in order to guarantee data consistency.
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/HiveIcebergStorageHandler.java