FetchIndexData 用于 Index 数据查询。根据主键 ID，在指定的 Index 查询单条或多条数据，单次最多可查询100条数据。

declare class FetchIndexDataResponse<
  Data extends Record<string, any>,
  PrimaryKey extends GetPrimaryKeys<Data>
> {
  readonly Data: FetchDataInfo<Data, PrimaryKey>[];
  readonly OriginalRequest: string;
  readonly LogId: string;
  constructor(
    Data: FetchDataInfo<Data, PrimaryKey>[],
    OriginalRequest: string,
    LogId: string
  );
}

type GetPrimaryKeys<T extends Record<string, any>> = {
  [K in keyof T]: IsPrimaryKey<T, K> extends true ? K : never;
}[keyof T];

type FetchDataInfo<
  Data extends Record<string, any>,
  PrimaryKey extends GetPrimaryKeys<Data>
> = Data | { [Key in PrimaryKey]: ScalarFieldType2JsType[Data[PrimaryKey]] };

type IsNever<T> = [T] extends [never] ? true : false;

type IsUnion<T, B = T> = IsNever<T> extends true
  ? false
  : T extends B
  ? [B] extends [T]
    ? false
    : true
  : never;
  
enum FieldType {
  Int64 = "int64",
  Float32 = "float32",
  String = "string",
  Boolean = "bool",
  ListString = "list<string>",
  ListInt64 = "list<int64>",
  /** 稠密向量 */
  DenseVector = "vector",
  /** 稀疏向量 */
  SparseVector = "sparse_vector",
  Text = "text",
}  
  
interface ScalarFieldType2JsType {
  [FieldType.Int64]: number;
  [FieldType.Float32]: number;
  [FieldType.String]: string;
  [FieldType.Boolean]: boolean;
  [FieldType.ListString]: string[];
  [FieldType.ListInt64]: Array<number>;
}
  
type IsPrimaryKey<
  Data extends Record<string, any>,
  PrimaryKey extends keyof Data
> = IsUnion<PrimaryKey> extends true
  ? false
  : Data[PrimaryKey] extends ScalarFieldType2JsType[PrimaryKeyFieldType]
  ? true
  : false;

import { vikingdb } from '@volcengine/openapi'

declare const service: vikingdb.VikingdbService // 替换为你初始化好的实例

interface Data {
  Id: number,
  Name: string
}

const response = await service.data.FetchIndexData<Data, 'Id'>({
  CollectionName: 'test_collection_1',
  IndexName: 'test_index_1',
  PrimaryKeys: [1, 2],
  Partition: 3, // optional
  OutputFields: ['Id', 'Name'], // optional
})

console.log(response.Data) // 查询的索引数据 Data