protected FileFormat deleteFileFormat() {
    String deleteFileFormatName =
        table.properties().getOrDefault(DELETE_DEFAULT_FILE_FORMAT, DEFAULT_FILE_FORMAT_DEFAULT);
    return FileFormat.valueOf(deleteFileFormatName.toUpperCase());
  }
An abstract OptimizingExecutor implementation that rewrites the rewrittenDataFiles in
RewriteInput and generates new position delete for rePosDeletedDataFiles.
amoro-format-iceberg/src/main/java/org/apache/amoro/optimizing/AbstractRewriteFilesExecutor.java