@Override
  public ConnectorSplitSource getSplits(
      ConnectorTransactionHandle transaction,
      ConnectorSession session,
      ConnectorTableHandle handle,
      DynamicFilter dynamicFilter,
      Constraint constraint) {
    IcebergTableHandle table = (IcebergTableHandle) handle;

    if (table.getSnapshotId().isEmpty()) {
      if (table.isRecordScannedFiles()) {
        return new FixedSplitSource(ImmutableList.of(), ImmutableList.of());
      }
      return new FixedSplitSource(ImmutableList.of());
    }

    Table icebergTable =
        transactionManager
            .get(transaction)
            .getMixedTable(table.getSchemaTableName())
            .asUnkeyedTable();
    Duration dynamicFilteringWaitTimeout = getDynamicFilteringWaitTimeout(session);

    TableScan tableScan = icebergTable.newScan().useSnapshot(table.getSnapshotId().get());

    TableNameResolve resolve = new TableNameResolve(table.getTableName());
    IcebergSplitSource splitSource =
        new IcebergSplitSource(
            fileSystemFactory,
            session,
            table,
            tableScan,
            table.getMaxScannedFileSize(),
            dynamicFilter,
            dynamicFilteringWaitTimeout,
            constraint,
            typeManager,
            table.isRecordScannedFiles(),
            getMinimumAssignedSplitWeight(session),
            resolve.withSuffix() && !resolve.isBase());

    return new ClassLoaderSafeConnectorSplitSource(
        splitSource, Thread.currentThread().getContextClassLoader());
  }
Iceberg original IcebergSplitManager has some problems for mixed-format table, such as iceberg
version, table type.
amoro-format-mixed/amoro-mixed-trino/src/main/java/org/apache/amoro/trino/unkeyed/IcebergSplitManager.java