public RowType requiredRowType() {
      return requiredRowType;
    }
Copy from iceberg. Adopt AdaptHiveFlinkParquetReaders to adapt hive flink parquet readers.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common-iceberg-bridge/src/main/java/org/apache/iceberg/flink/source/RowDataFileScanTaskReader.java