Add a sparse example

examples/milvus/Data.ts

@@ -1,3 +1,5 @@
+import { SparseFloatVector } from "@zilliz/milvus2-sdk-node";
+
 // build example data
 export const vectorsData = [
   {
@@ -55,3 +57,43 @@ export const vectorsData = [
     name: 'sb7mt',
   },
 ];
+
+type sparseVectorsDataItem = {
+  vector: SparseFloatVector;
+  height: number;
+  name: string;
+};
+
+export const sparseVectorsData : sparseVectorsDataItem[] = [
+  {
+    "vector": {"1": 0.1, "100": 0.3, "55": 0.324},
+    "height": 20405,
+    "name": "zlnmh"
+  },
+  {
+    "vector": {"5": 0.45, "1234": 0.67, "789": 0.23, "456": 0.89},
+    "height": 93773,
+    "name": "5lr9y"
+  },
+  {
+    "vector": {"12": 0.34, "5678": 0.56, "234": 0.78, "6789": 0.12},
+    "height": 85122,
+    "name": "nes0j"
+  },
+  {
+    "vector": {"3": 0.67, "890": 0.45, "12345": 0.89, "678": 0.23},
+    "height": 92037,
+    "name": "ct2li"
+  },
+  {
+    "vector": {"45": 0.12, "678": 0.34, "2345": 0.56, "7890": 0.78},
+    "height": 31400,
+    "name": "6ghrg"
+  },
+  {
+    "vector": {"67": 0.45, "8901": 0.67, "123": 0.89, "4567": 0.23},
+    "height": 1778,
+    "name": "sb7mt"
+  }
+]
+;

examples/milvus/HelloSparse.ts

@@ -0,0 +1,87 @@
+import { MilvusClient, InsertReq, DataType, SparseFloatVector } from '@zilliz/milvus2-sdk-node';
+import { sparseVectorsData } from './Data';
+const COLLECTION_NAME = 'hello_sparse';
+
+(async () => {
+  // build client
+  const milvusClient = new MilvusClient({
+    address: 'localhost:19530',
+    username: 'username',
+    password: 'Aa12345!!',
+  });
+
+  console.log('Node client is initialized.');
+
+  await milvusClient.dropCollection({
+    collection_name: COLLECTION_NAME,
+  });
+
+  // create collection
+  const create = await milvusClient.createCollection({
+    collection_name: COLLECTION_NAME,
+    fields: [
+      {
+        name: 'age',
+        description: 'ID field',
+        data_type: DataType.Int64,
+        is_primary_key: true,
+        autoID: true,
+      },
+      {
+        name: 'vector',
+        description: 'Vector field',
+        data_type: DataType.SparseFloatVector,
+      },
+      { name: 'height', description: 'int64 field', data_type: DataType.Int64 },
+      {
+        name: 'name',
+        description: 'VarChar field',
+        data_type: DataType.VarChar,
+        max_length: 128,
+      },
+    ],
+  });
+  console.log('Create collection is finished.', create);
+
+  const params: InsertReq = {
+    collection_name: COLLECTION_NAME,
+    fields_data: sparseVectorsData,
+  };
+  // insert data into collection
+  await milvusClient.insert(params);
+  console.log('Data is inserted.');
+
+  // create index
+  const createIndex = await milvusClient.createIndex({
+    collection_name: COLLECTION_NAME,
+    field_name: 'vector',
+    metric_type: 'IP',
+    index_type: 'SPARSE_INVERTED_INDEX',
+  });
+
+  console.log('Index is created', createIndex);
+
+  // need load collection before search
+  const load = await milvusClient.loadCollectionSync({
+    collection_name: COLLECTION_NAME,
+  });
+  console.log('Collection is loaded.', load);
+
+  // do the search
+  for (let i = 0; i < 1; i++) {
+    console.time('Search time');
+    const search = await milvusClient.search({
+      collection_name: COLLECTION_NAME,
+      vector: sparseVectorsData[i]['vector'],
+      output_fields: ['age'],
+      limit: 5,
+    });
+    console.timeEnd('Search time');
+    console.log('Search result', search);
+  }
+
+  // drop collection
+  await milvusClient.dropCollection({
+    collection_name: COLLECTION_NAME,
+  });
+})();