@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // CATALOG
          return CATALOG;
        case 2: // DATABASE
          return DATABASE;
        case 3: // TABLE_NAME
          return TABLE_NAME;
        default:
          return null;
      }
    }
Find the _Fields constant that matches fieldId, or null if its not found.
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/evaluator/amoro/TableIdentifier.java