@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // TABLE
          return TABLE;
        case 2: // ENV_CONTEXT
          return ENV_CONTEXT;
        case 3: // PRIMARY_KEYS
          return PRIMARY_KEYS;
        case 4: // FOREIGN_KEYS
          return FOREIGN_KEYS;
        case 5: // UNIQUE_CONSTRAINTS
          return UNIQUE_CONSTRAINTS;
        case 6: // NOT_NULL_CONSTRAINTS
          return NOT_NULL_CONSTRAINTS;
        case 7: // DEFAULT_CONSTRAINTS
          return DEFAULT_CONSTRAINTS;
        case 8: // CHECK_CONSTRAINTS
          return CHECK_CONSTRAINTS;
        case 9: // PROCESSOR_CAPABILITIES
          return PROCESSOR_CAPABILITIES;
        case 10: // 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/CreateTableRequest.java