public void setFieldValue(_Fields field, @org.apache.thrift.annotation.Nullable Object value) {
    switch (field) {
    case CATALOG:
      if (value == null) {
        unsetCatalog();
      } else {
        setCatalog((String)value);
      }
      break;

    case DATABASE:
      if (value == null) {
        unsetDatabase();
      } else {
        setDatabase((String)value);
      }
      break;

    case TABLE_NAME:
      if (value == null) {
        unsetTableName();
      } else {
        setTableName((String)value);
      }
      break;

    }
  }
Returns true if field tableName is set (has been assigned a value) and false otherwise
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/evaluator/amoro/TableIdentifier.java