private TableOperations newTableOperations(boolean changeStore) {
    if (InternalTableUtil.isLegacyMixedIceberg(tableMetadata())) {
      String tableLocation =
          changeStore ? tableMetadata().getChangeLocation() : tableMetadata().getBaseLocation();
      TableMetaStore metaStore = CatalogUtil.buildMetaStore(catalogMeta);

      MixedHadoopTableOperations ops =
          new MixedHadoopTableOperations(new Path(tableLocation), io, metaStore.getConfiguration());
      org.apache.iceberg.TableMetadata current = ops.current();
      if (current == null) {
        return ops;
      }
      org.apache.iceberg.TableMetadata legacyCurrent = legacyTableMetadata(current, changeStore);
      if (!current.equals(legacyCurrent)) {
        // add rest based mixed-format table properties
        ops.commit(current, legacyCurrent);
      }
      return ops;
    }
    return new MixedIcebergInternalTableStoreOperations(
        tableMetadata().getTableIdentifier(), tableMetadata(), io, changeStore);
  }
Table handler for mixed-iceberg format
amoro-ams/src/main/java/org/apache/amoro/server/table/internal/InternalMixedIcebergHandler.java