@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_PATTERN
          return TABLE_NAME_PATTERN;
        case 4: // REQUESTED_FIELDS
          return REQUESTED_FIELDS;
        case 5: // LIMIT
          return LIMIT;
        case 6: // PROCESSOR_CAPABILITIES
          return PROCESSOR_CAPABILITIES;
        case 7: // PROCESSOR_IDENTIFIER
          return PROCESSOR_IDENTIFIER;
        default:
          return null;
      }
    }
Find the _Fields constant that matches fieldId, or null if its not found.
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/GetTablesExtRequest.java