@Override
    protected DataType defaultMethod(org.apache.paimon.types.DataType dataType) {
      throw new UnsupportedOperationException("Unsupported type: " + dataType);
    }
For simplicity, as a temporary solution, we directly convert the non-null attribute to
nullable on the Spark side.
amoro-format-paimon/src/main/java/org/apache/amoro/formats/paimon/PaimonTypeToSparkType.java