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API Reference

使用 JSON 字段

本指南介绍如何使用 JSON 字段，例如插入 JSON 值以及使用基本和高级操作符在 JSON 字段中搜索和查询。

概述

JSON 是 Javascript Object Notation 的缩写，是一种基于文本的轻量级简单数据格式。JSON 中的数据采用键值对结构，其中每个键都是一个字符串，可映射到数字、字符串、布尔、列表或数组的值。利用 Milvus 群集，可以将字典作为字段值存储在 Collections 中。

例如，以下代码会随机生成键值对，每个键值对都包含一个键值为颜色的 JSON 字段。

Python Java Node.js

# 3. Insert randomly generated vectors 
colors = ["green", "blue", "yellow", "red", "black", "white", "purple", "pink", "orange", "brown", "grey"]
data = []

for i in range(1000):
    current_color = random.choice(colors)
    current_tag = random.randint(1000, 9999)
    current_coord = [ random.randint(0, 40) for _ in range(3) ]
    current_ref = [ [ random.choice(colors) for _ in range(3) ] for _ in range(3) ]
    data.append({
        "id": i,
        "vector": [ random.uniform(-1, 1) for _ in range(5) ],
        "color": {
            "label": current_color,
            "tag": current_tag,
            "coord": current_coord,
            "ref": current_ref
        }
    })

print(data[0])

import java.util.*;

import com.google.gson.Gson;
import com.google.gson.JsonObject;

// 3. Insert randomly generated vectors and JSON data into the collection
List<String> colors = Arrays.asList("green", "blue", "yellow", "red", "black", "white", "purple", "pink", "orange", "brown", "grey");
List<JsonObject> data = new ArrayList<>();

Gson gson = new Gson();
Random rand = new Random();
for (int i=0; i<1000; i++) {
    String current_color = colors.get(rand.nextInt(colors.size()-1));
    Integer current_tag = rand.nextInt(8999) + 1000;
    List<Integer> current_coord = Arrays.asList(rand.nextInt(40), rand.nextInt(40), rand.nextInt(40));
    List<List<String>> current_ref = Arrays.asList(
            Arrays.asList(colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1))),
            Arrays.asList(colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1))),
            Arrays.asList(colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1)), colors.get(rand.nextInt(colors.size()-1)))
    );
    JsonObject row = new JsonObject();
    row.addProperty("id", (long) i);
    row.add("vector", gson.toJsonTree(Arrays.asList(rand.nextFloat(), rand.nextFloat(), rand.nextFloat(), rand.nextFloat(), rand.nextFloat())));
    JsonObject color = new JsonObject();
    color.addProperty("label", current_color);
    color.addProperty("tag", current_tag);
    color.add("coord", gson.toJsonTree(current_coord));
    color.add("ref", gson.toJsonTree(current_ref));
    row.add("color", color);
    data.add(row);
}

System.out.println(data.get(0));

// 3. Insert randomly generated vectors 
const colors = ["green", "blue", "yellow", "red", "black", "white", "purple", "pink", "orange", "brown", "grey"]
var data = []

for (let i = 0; i < 1000; i++) {
    const current_color = colors[Math.floor(Math.random() * colors.length)]
    const current_tag = Math.floor(Math.random() * 8999 + 1000)
    const current_coord = Array(3).fill(0).map(() => Math.floor(Math.random() * 40))
    const current_ref = [ Array(3).fill(0).map(() => colors[Math.floor(Math.random() * colors.length)]) ]

    data.push({
        id: i,
        vector: [Math.random(), Math.random(), Math.random(), Math.random(), Math.random()],
        color: {
            label: current_color,
            tag: current_tag,
            coord: current_coord,
            ref: current_ref
        }
    })
}

console.log(data[0])

您可以通过查看第一个条目来查看生成数据的结构。

{
    "id": 0,
    "vector": [
        -0.8017921296923975,
        0.550046715206634,
        0.764922589768134,
        0.6371433836123146,
        0.2705233937454232
    ],
    "color": {
        "label": "blue",
        "tag": 9927,
        "coord": [
            22,
            36,
            6
        ],
        "ref": [
            [
                "blue",
                "green",
                "white"
            ],
            [
                "black",
                "green",
                "pink"
            ],
            [
                "grey",
                "black",
                "brown"
            ]
        ]
    }
}

注释

确保列表或数组中的所有值都是相同的数据类型。
JSON 字段值中的任何嵌套字典都将被视为字符串。
仅使用字母数字字符和下划线来命名 JSON 键，因为其他字符可能会导致过滤或搜索出现问题。
目前还不能为 JSON 字段编制索引，这可能会导致过滤耗时。不过，这一限制将在即将发布的版本中得到解决。

定义 JSON 字段

要定义 JSON 字段，只需遵循与定义其他类型字段相同的步骤即可。

有关参数的更多信息，请参阅 MilvusClient, create_schema(), add_field(), add_index(), create_collection()和 get_load_state()在 SDK 参考资料中。

有关参数的更多信息，请参阅 MilvusClientV2, createSchema(), addField(), IndexParam, createCollection()和 getLoadState()在 SDK 参考资料中。

有关参数的更多信息，请参阅 MilvusClient和 createCollection()和 createCollection()SDK 参考资料中的参数。

Python Java Node.js

import random, time
from pymilvus import connections, MilvusClient, DataType

CLUSTER_ENDPOINT = "http://localhost:19530"

# 1. Set up a Milvus client
client = MilvusClient(
    uri=CLUSTER_ENDPOINT
)

# 2. Create a collection
schema = MilvusClient.create_schema(
    auto_id=False,
    enable_dynamic_field=False,
)

schema.add_field(field_name="id", datatype=DataType.INT64, is_primary=True)
schema.add_field(field_name="vector", datatype=DataType.FLOAT_VECTOR, dim=5)
schema.add_field(field_name="color", datatype=DataType.JSON)

index_params = MilvusClient.prepare_index_params()

index_params.add_index(
    field_name="id",
    index_type="STL_SORT"
)

index_params.add_index(
    field_name="vector",
    index_type="IVF_FLAT",
    metric_type="L2",
    params={"nlist": 1024}
)

client.create_collection(
    collection_name="test_collection",
    schema=schema,
    index_params=index_params
)

res = client.get_load_state(
    collection_name="test_collection"
)

print(res)

# Output
#
# {
#     "state": "<LoadState: Loaded>"
# }

import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.common.DataType;
import io.milvus.v2.common.IndexParam;
import io.milvus.v2.service.collection.request.*;
import io.milvus.v2.service.vector.request.*;
import io.milvus.v2.service.vector.request.data.*;
import io.milvus.v2.service.vector.response.*;

String CLUSTER_ENDPOINT = "http://localhost:19530";

// 1. Connect to Milvus server
ConnectConfig connectConfig = ConnectConfig.builder()
    .uri(CLUSTER_ENDPOINT)
    .build();

MilvusClientV2 client = new MilvusClientV2(connectConfig);

// 2. Create a collection in customized setup mode

// 2.1 Create schema
CreateCollectionReq.CollectionSchema schema = client.createSchema();

// 2.2 Add fields to schema
schema.addField(AddFieldReq.builder()
        .fieldName("id")
        .dataType(DataType.Int64)
        .isPrimaryKey(true)
        .autoID(false)
        .build());

schema.addField(AddFieldReq.builder()
        .fieldName("vector")
        .dataType(DataType.FloatVector)
        .dimension(5)
        .build());

schema.addField(AddFieldReq.builder()
        .fieldName("color")
        .dataType(DataType.JSON)
        .build());

// 2.3 Prepare index parameters
IndexParam indexParamForIdField = IndexParam.builder()
        .fieldName("id")
        .indexType(IndexParam.IndexType.STL_SORT)
        .build();

Map<String, Object> params = new HashMap<>();
params.put("nlist", 1024);
IndexParam indexParamForVectorField = IndexParam.builder()
        .fieldName("vector")
        .indexType(IndexParam.IndexType.IVF_FLAT)
        .metricType(IndexParam.MetricType.IP)
        .extraParams(params)
        .build();

List<IndexParam> indexParams = new ArrayList<>();
indexParams.add(indexParamForIdField);
indexParams.add(indexParamForVectorField);

// 2.4 Create a collection with schema and index parameters
CreateCollectionReq customizedSetupReq = CreateCollectionReq.builder()
        .collectionName("test_collection")
        .collectionSchema(schema)
        .indexParams(indexParams)
        .build();

client.createCollection(customizedSetupReq);

// 2.5 Check if the collection is loaded
GetLoadStateReq getLoadStateReq = GetLoadStateReq.builder()
        .collectionName("test_collection")
        .build();

Boolean isLoaded = client.getLoadState(getLoadStateReq);

System.out.println(isLoaded);

// Output:
// true

const { MilvusClient, DataType, sleep } = require("@zilliz/milvus2-sdk-node")

const address = "http://localhost:19530"

async function main() {
// 1. Set up a Milvus Client
client = new MilvusClient({address}); 

// 2. Create a collection
// 2.1 Define fields
const fields = [
    {
        name: "id",
        data_type: DataType.Int64,
        is_primary_key: true,
        auto_id: false
    },
    {
        name: "vector",
        data_type: DataType.FloatVector,
        dim: 5
    },
    {
        name: "color",
        data_type: DataType.JSON,
    }
]

// 2.2 Prepare index parameters
const index_params = [{
    field_name: "vector",
    index_type: "IVF_FLAT",
    metric_type: "IP",
    params: { nlist: 1024}
}]

// 2.3 Create a collection with fields and index parameters
res = await client.createCollection({
    collection_name: "test_collection",
    fields: fields, 
    index_params: index_params
})

console.log(res.error_code)

// Output
// 
// Success
// 

res = await client.getLoadState({
    collection_name: "test_collection",
})  

console.log(res.state)

// Output
// 
// LoadStateLoaded
//

有关参数的更多信息，请参阅 MilvusClient, create_schema(), add_field(), add_index(), create_collection()和 get_load_state()在 SDK 参考资料中。

有关参数的更多信息，请参阅 MilvusClientV2, createSchema(), addField(), IndexParam, createCollection()和 getLoadState()在 SDK 参考资料中。

有关参数的更多信息，请参阅 MilvusClient, createCollection()和 getLoadState()的更多信息。

插入字段值

从CollectionSchema 对象创建一个 Collections 后，就可以向其中插入字典，如上面的字典。

使用 insert()方法将数据插入 Collections。

Python Java Node.js

res = client.insert(
    collection_name="test_collection",
    data=data
)

print(res)

# Output
#
# {
#     "insert_count": 1000,
#     "ids": [
#         0,
#         1,
#         2,
#         3,
#         4,
#         5,
#         6,
#         7,
#         8,
#         9,
#         "(990 more items hidden)"
#     ]
# }

// 3.1 Insert data into the collection
InsertReq insertReq = InsertReq.builder()
        .collectionName("test_collection")
        .data(data)
        .build();

InsertResp insertResp = client.insert(insertReq);

System.out.println(insertResp.getInsertCnt());

// Output:
// 1000

// 3. Insert randomly generated vectors 
const colors = ["green", "blue", "yellow", "red", "black", "white", "purple", "pink", "orange", "brown", "grey"]
var data = []

for (let i = 0; i < 1000; i++) {
    const current_color = colors[Math.floor(Math.random() * colors.length)]
    const current_tag = Math.floor(Math.random() * 8999 + 1000)
    const current_coord = Array(3).fill(0).map(() => Math.floor(Math.random() * 40))
    const current_ref = [ Array(3).fill(0).map(() => colors[Math.floor(Math.random() * colors.length)]) ]

    data.push({
        id: i,
        vector: [Math.random(), Math.random(), Math.random(), Math.random(), Math.random()],
        color: {
            label: current_color,
            tag: current_tag,
            coord: current_coord,
            ref: current_ref
        }
    })
}

console.log(data[0])

// Output
// 
// {
//   id: 0,
//   vector: [
//     0.11455530974226114,
//     0.21704086958595314,
//     0.9430119822312437,
//     0.7802712923612023,
//     0.9106927960926137
//   ],
//   color: { label: 'grey', tag: 7393, coord: [ 22, 1, 22 ], ref: [ [Array] ] }
// }
// 

res = await client.insert({
    collection_name: "test_collection",
    data: data,
})

console.log(res.insert_cnt)

// Output
// 
// 1000
//

基本标量过滤

一旦添加了所有数据，您就可以使用 JSON 字段中的键进行搜索和查询，其方式与使用标准标量字段的方式相同。

有关参数的更多信息，请参阅 search()有关参数的更多信息，请参阅 SDK 参考资料中的

Python Java Node.js

# 4. Basic search with a JSON field
query_vectors = [ [ random.uniform(-1, 1) for _ in range(5) ]]

res = client.search(
    collection_name="test_collection",
    data=query_vectors,
    filter='color["label"] in ["red"]',
    search_params={
        "metric_type": "L2",
        "params": {"nprobe": 16}
    },
    output_fields=["id", "color"],
    limit=3
)

print(res)

# Output
#
# [
#     [
#         {
#             "id": 460,
#             "distance": 0.4016231596469879,
#             "entity": {
#                 "id": 460,
#                 "color": {
#                     "label": "red",
#                     "tag": 5030,
#                     "coord": [14, 32, 40],
#                     "ref": [
#                         [ "pink", "green", "brown" ],
#                         [ "red", "grey", "black"],
#                         [ "red", "yellow", "orange"]
#                     ]
#                 }
#             }
#         },
#         {
#             "id": 785,
#             "distance": 0.451080858707428,
#             "entity": {
#                 "id": 785,
#                 "color": {
#                     "label": "red",
#                     "tag": 5290,
#                     "coord": [31, 13, 23],
#                     "ref": [
#                         ["yellow", "pink", "pink"],
#                         ["purple", "grey", "orange"],
#                         ["grey", "purple", "pink"]
#                     ]
#                 }
#             }
#         },
#         {
#             "id": 355,
#             "distance": 0.5839247703552246,
#             "entity": {
#                 "id": 355,
#                 "color": {
#                     "label": "red",
#                     "tag": 8725,
#                     "coord": [5, 10, 22],
#                     "ref": [
#                         ["white", "purple", "yellow"],
#                         ["white", "purple", "white"],
#                         ["orange", "white", "pink"]
#                     ]
#                 }
#             }
#         }
#     ]
# ]

// 4. Search with partition key
List<BaseVector> query_vectors = Collections.singletonList(new FloatVec(new float[]{0.3580376395471989f, -0.6023495712049978f, 0.18414012509913835f, -0.26286205330961354f, 0.9029438446296592f}));

SearchReq searchReq = SearchReq.builder()
        .collectionName("test_collection")
        .data(query_vectors)
        .filter("color[\"label\"] in [\"red\"]")
        .outputFields(Arrays.asList("id", "color"))
        .topK(3)
        .build();

SearchResp searchResp = client.search(searchReq);

List<List<SearchResp.SearchResult>> searchResults = searchResp.getSearchResults();
for (List<SearchResp.SearchResult> results : searchResults) {
    System.out.println("TopK results:");
    for (SearchResp.SearchResult result : results) {
        System.out.println(result);
    }
}

// Output:
// SearchResp.SearchResult(entity={color={"label":"red","tag":1018,"coord":[3,30,1],"ref":[["yellow","brown","orange"],["yellow","purple","blue"],["green","purple","purple"]]}, id=295}, score=1.1190735, id=295)
// SearchResp.SearchResult(entity={color={"label":"red","tag":8141,"coord":[38,31,29],"ref":[["blue","white","white"],["green","orange","green"],["yellow","green","black"]]}, id=667}, score=1.0679582, id=667)
// SearchResp.SearchResult(entity={color={"label":"red","tag":6837,"coord":[29,9,8],"ref":[["green","black","blue"],["purple","white","green"],["red","blue","black"]]}, id=927}, score=1.0029297, id=927)

// 4. Basic search with a JSON field
query_vectors = [[0.6765405125697714, 0.759217474274025, 0.4122471841491111, 0.3346805565394215, 0.09679748345514638]]

res = await client.search({
    collection_name: "test_collection",
    data: query_vectors,
    filter: 'color["label"] in ["red"]',
    output_fields: ["color", "id"],
    limit: 3
})

console.log(JSON.stringify(res.results, null, 4))

// Output
// 
// [
//     {
//         "score": 1.777988076210022,
//         "id": "595",
//         "color": {
//             "label": "red",
//             "tag": 7393,
//             "coord": [31,34,18],
//             "ref": [
//                 ["grey", "white", "orange"]
//             ]
//         }
//     },
//     {
//         "score": 1.7542595863342285,
//         "id": "82",
//         "color": {
//             "label": "red",
//             "tag": 8636,
//             "coord": [4,37,29],
//             "ref": [
//                 ["brown", "brown", "pink"]
//             ]
//         }
//     },
//     {
//         "score": 1.7537562847137451,
//         "id": "748",
//         "color": {
//             "label": "red",
//             "tag": 1626,
//             "coord": [31,4,25
//             ],
//             "ref": [
//                 ["grey", "green", "blue"]
//             ]
//         }
//     }
// ]
//

高级标量过滤

Milvus 为 JSON 字段中的标量过滤提供了一组高级过滤器。这些过滤器是JSON_CONTAINS 、JSON_CONTAINS_ALL 和JSON_CONTAINS_ANY 。

过滤以["blue", "brown", "grey"] 作为参考颜色集的所有实体。

Python Java Node.js

# 5. Advanced search within a JSON field

res = client.query(
    collection_name="test_collection",
    data=query_vectors,
    filter='JSON_CONTAINS(color["ref"], ["blue", "brown", "grey"])',
    output_fields=["id", "color"],
    limit=3
)

print(res)

# Output
#
# [
#     {
#         "id": 79,
#         "color": {
#             "label": "orange",
#             "tag": 8857,
#             "coord": [
#                 10,
#                 14,
#                 5
#             ],
#             "ref": [
#                 [
#                     "yellow",
#                     "white",
#                     "green"
#                 ],
#                 [
#                     "blue",
#                     "purple",
#                     "purple"
#                 ],
#                 [
#                     "blue",
#                     "brown",
#                     "grey"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 371,
#         "color": {
#             "label": "black",
#             "tag": 1324,
#             "coord": [
#                 2,
#                 18,
#                 32
#             ],
#             "ref": [
#                 [
#                     "purple",
#                     "orange",
#                     "brown"
#                 ],
#                 [
#                     "blue",
#                     "brown",
#                     "grey"
#                 ],
#                 [
#                     "purple",
#                     "blue",
#                     "blue"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 590,
#         "color": {
#             "label": "red",
#             "tag": 3340,
#             "coord": [
#                 13,
#                 21,
#                 13
#             ],
#             "ref": [
#                 [
#                     "yellow",
#                     "yellow",
#                     "red"
#                 ],
#                 [
#                     "blue",
#                     "brown",
#                     "grey"
#                 ],
#                 [
#                     "pink",
#                     "yellow",
#                     "purple"
#                 ]
#             ]
#         }
#     }
# ]

// 5. Advanced search within a JSON field
searchReq = SearchReq.builder()
        .collectionName("test_collection")
        .data(query_vectors)
        .filter("JSON_CONTAINS(color[\"ref\"], [\"purple\", \"pink\", \"orange\"])")
        .outputFields(Arrays.asList("id", "color"))
        .topK(3)
        .build();

searchResp = client.search(searchReq);

searchResults = searchResp.getSearchResults();
for (List<SearchResp.SearchResult> results : searchResults) {
    System.out.println("TopK results:");
    for (SearchResp.SearchResult result : results) {
        System.out.println(result);
    }
}

// Output:
// SearchResp.SearchResult(entity={color={"label":"pink","tag":2963,"coord":[15,33,30],"ref":[["green","white","white"],["purple","pink","orange"],["yellow","black","pink"]]}, id=273}, score=0.46558747, id=273)
// SearchResp.SearchResult(entity={color={"label":"pink","tag":4027,"coord":[32,34,19],"ref":[["red","white","blue"],["white","pink","yellow"],["purple","pink","orange"]]}, id=344}, score=0.2637315, id=344)
// SearchResp.SearchResult(entity={color={"label":"black","tag":1603,"coord":[33,12,23],"ref":[["pink","brown","black"],["black","purple","black"],["purple","pink","orange"]]}, id=205}, score=0.26133868, id=205)

// 5. Advanced search within a JSON field
res = await client.search({
    collection_name: "test_collection",
    data: query_vectors,
    filter: 'JSON_CONTAINS(color["ref"], ["blue", "brown", "grey"])',
    output_fields: ["color", "id"],
    limit: 3
})

console.log(JSON.stringify(res.results, null, 4))

// Output
// 
// [
//     {
//         "id": 79,
//         "color": {
//             "label": "orange",
//             "tag": 8857,
//             "coord": [
//                 10,
//                 14,
//                 5
//             ],
//             "ref": [
//                 [
//                     "yellow",
//                     "white",
//                     "green"
//                 ],
//                 [
//                     "blue",
//                     "purple",
//                     "purple"
//                 ],
//                 [
//                     "blue",
//                     "brown",
//                     "grey"
//                 ]
//             ]
//         }
//     },
//     {
//         "id": 371,
//         "color": {
//             "label": "black",
//             "tag": 1324,
//             "coord": [
//                 2,
//                 18,
//                 32
//             ],
//             "ref": [
//                 [
//                     "purple",
//                     "orange",
//                     "brown"
//                 ],
//                 [
//                     "blue",
//                     "brown",
//                     "grey"
//                 ],
//                 [
//                     "purple",
//                     "blue",
//                     "blue"
//                 ]
//             ]
//         }
//     },
//     {
//         "id": 590,
//         "color": {
//             "label": "red",
//             "tag": 3340,
//             "coord": [
//                 13,
//                 21,
//                 13
//             ],
//             "ref": [
//                 [
//                     "yellow",
//                     "yellow",
//                     "red"
//                 ],
//                 [
//                     "blue",
//                     "brown",
//                     "grey"
//                 ],
//                 [
//                     "pink",
//                     "yellow",
//                     "purple"
//                 ]
//             ]
//         }
//     }
// ]
//

过滤协调器为[4, 5] 的实体。

Python Java Node.js

res = client.query(
    collection_name="test_collection",
    data=query_vectors,
    filter='JSON_CONTAINS_ALL(color["coord"], [4, 5])',
    output_fields=["id", "color"],
    limit=3
)

print(res)

# Output
#
# [
#     {
#         "id": 281,
#         "color": {
#             "label": "red",
#             "tag": 3645,
#             "coord": [
#                 5,
#                 33,
#                 4
#             ],
#             "ref": [
#                 [
#                     "orange",
#                     "blue",
#                     "pink"
#                 ],
#                 [
#                     "purple",
#                     "blue",
#                     "purple"
#                 ],
#                 [
#                     "black",
#                     "brown",
#                     "yellow"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 464,
#         "color": {
#             "label": "brown",
#             "tag": 6261,
#             "coord": [
#                 5,
#                 9,
#                 4
#             ],
#             "ref": [
#                 [
#                     "purple",
#                     "purple",
#                     "brown"
#                 ],
#                 [
#                     "black",
#                     "pink",
#                     "white"
#                 ],
#                 [
#                     "brown",
#                     "grey",
#                     "brown"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 567,
#         "color": {
#             "label": "green",
#             "tag": 4589,
#             "coord": [
#                 5,
#                 39,
#                 4
#             ],
#             "ref": [
#                 [
#                     "purple",
#                     "yellow",
#                     "white"
#                 ],
#                 [
#                     "yellow",
#                     "yellow",
#                     "brown"
#                 ],
#                 [
#                     "blue",
#                     "red",
#                     "yellow"
#                 ]
#             ]
#         }
#     }
# ]

searchReq = SearchReq.builder()
        .collectionName("test_collection")
        .data(query_vectors)
        .filter("JSON_CONTAINS_ALL(color[\"coord\"], [4, 5])")
        .outputFields(Arrays.asList("id", "color"))
        .topK(3)
        .build();

searchResp = client.search(searchReq);

searchResults = searchResp.getSearchResults();
for (List<SearchResp.SearchResult> results : searchResults) {
    System.out.println("TopK results:");
    for (SearchResp.SearchResult result : results) {
        System.out.println(result);
    }
} 

// Output:
// SearchResp.SearchResult(entity={color={"label":"green","tag":9899,"coord":[5,4,25],"ref":[["purple","black","yellow"],["orange","green","purple"],["red","purple","pink"]]}, id=708}, score=0.56576324, id=708)
// SearchResp.SearchResult(entity={color={"label":"red","tag":2176,"coord":[4,5,23],"ref":[["red","black","green"],["brown","orange","brown"],["brown","orange","yellow"]]}, id=981}, score=0.5656834, id=981)
// SearchResp.SearchResult(entity={color={"label":"pink","tag":3085,"coord":[5,3,4],"ref":[["yellow","orange","green"],["black","pink","red"],["orange","blue","blue"]]}, id=221}, score=0.3708634, id=221)

res = await client.search({
    collection_name: "test_collection",
    data: query_vectors,
    filter: 'JSON_CONTAINS_ALL(color["coord"], [4, 5])',
    output_fields: ["color", "id"],
    limit: 3
})

console.log(JSON.stringify(res.results, null, 4))

// Output
// 
// [
//     {
//         "score": 1.8944344520568848,
//         "id": "792",
//         "color": {
//             "label": "purple",
//             "tag": 8161,
//             "coord": [
//                 4,
//                 38,
//                 5
//             ],
//             "ref": [
//                 [
//                     "red",
//                     "white",
//                     "grey"
//                 ]
//             ]
//         }
//     },
//     {
//         "score": 1.2801706790924072,
//         "id": "489",
//         "color": {
//             "label": "red",
//             "tag": 4358,
//             "coord": [
//                 5,
//                 4,
//                 1
//             ],
//             "ref": [
//                 [
//                     "blue",
//                     "orange",
//                     "orange"
//                 ]
//             ]
//         }
//     },
//     {
//         "score": 1.2097992897033691,
//         "id": "656",
//         "color": {
//             "label": "red",
//             "tag": 7856,
//             "coord": [
//                 5,
//                 20,
//                 4
//             ],
//             "ref": [
//                 [
//                     "black",
//                     "orange",
//                     "white"
//                 ]
//             ]
//         }
//     }
// ]
//

过滤协调器包含4 或5 的实体。

Python Java Node.js

res = client.query(
    collection_name="test_collection",
    data=query_vectors,
    filter='JSON_CONTAINS_ANY(color["coord"], [4, 5])',
    output_fields=["id", "color"],
    limit=3
)

print(res)

# Output
#
# [
#     {
#         "id": 0,
#         "color": {
#             "label": "yellow",
#             "tag": 6340,
#             "coord": [
#                 40,
#                 4,
#                 40
#             ],
#             "ref": [
#                 [
#                     "purple",
#                     "yellow",
#                     "orange"
#                 ],
#                 [
#                     "green",
#                     "grey",
#                     "purple"
#                 ],
#                 [
#                     "black",
#                     "white",
#                     "yellow"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 2,
#         "color": {
#             "label": "brown",
#             "tag": 9359,
#             "coord": [
#                 38,
#                 21,
#                 5
#             ],
#             "ref": [
#                 [
#                     "red",
#                     "brown",
#                     "white"
#                 ],
#                 [
#                     "purple",
#                     "red",
#                     "brown"
#                 ],
#                 [
#                     "pink",
#                     "grey",
#                     "black"
#                 ]
#             ]
#         }
#     },
#     {
#         "id": 7,
#         "color": {
#             "label": "green",
#             "tag": 3560,
#             "coord": [
#                 5,
#                 9,
#                 5
#             ],
#             "ref": [
#                 [
#                     "blue",
#                     "orange",
#                     "green"
#                 ],
#                 [
#                     "blue",
#                     "blue",
#                     "black"
#                 ],
#                 [
#                     "green",
#                     "purple",
#                     "green"
#                 ]
#             ]
#         }
#     }
# ]

searchReq = SearchReq.builder()
        .collectionName("test_collection")
        .data(query_vectors)
        .filter("JSON_CONTAINS_ANY(color[\"coord\"], [4, 5])")
        .outputFields(Arrays.asList("id", "color"))
        .topK(3)
        .build();

searchResp = client.search(searchReq);
searchResults = searchResp.getSearchResults();
for (List<SearchResp.SearchResult> results : searchResults) {
    System.out.println("TopK results:");
    for (SearchResp.SearchResult result : results) {
        System.out.println(result);
    }
} 

// Output:
// SearchResp.SearchResult(entity={color={"label":"brown","tag":8414,"coord":[3,4,15],"ref":[["blue","green","pink"],["red","orange","pink"],["yellow","pink","green"]]}, id=11}, score=1.18235, id=11)
// SearchResp.SearchResult(entity={color={"label":"yellow","tag":2846,"coord":[20,4,15],"ref":[["white","black","purple"],["green","black","yellow"],["red","purple","brown"]]}, id=589}, score=1.1414992, id=589)
// SearchResp.SearchResult(entity={color={"label":"pink","tag":6744,"coord":[25,33,5],"ref":[["orange","purple","white"],["white","pink","brown"],["red","pink","red"]]}, id=567}, score=1.1087029, id=567)

res = await client.search({
    collection_name: "test_collection",
    data: query_vectors,
    filter: 'JSON_CONTAINS_ANY(color["coord"], [4, 5])',
    output_fields: ["color", "id"],
    limit: 3
})

console.log(JSON.stringify(res.results, null, 4))

// Output
// 
// [
//     {
//         "score": 1.9083369970321655,
//         "id": "453",
//         "color": {
//             "label": "brown",
//             "tag": 8788,
//             "coord": [
//                 21,
//                 18,
//                 5
//             ],
//             "ref": [
//                 [
//                     "pink",
//                     "black",
//                     "brown"
//                 ]
//             ]
//         }
//     },
//     {
//         "score": 1.8944344520568848,
//         "id": "792",
//         "color": {
//             "label": "purple",
//             "tag": 8161,
//             "coord": [
//                 4,
//                 38,
//                 5
//             ],
//             "ref": [
//                 [
//                     "red",
//                     "white",
//                     "grey"
//                 ]
//             ]
//         }
//     },
//     {
//         "score": 1.8615753650665283,
//         "id": "272",
//         "color": {
//             "label": "grey",
//             "tag": 3400,
//             "coord": [
//                 5,
//                 1,
//                 32
//             ],
//             "ref": [
//                 [
//                     "purple",
//                     "green",
//                     "white"
//                 ]
//             ]
//         }
//     }
// ]
//

JSON 过滤器参考

在处理 JSON 字段时，您可以使用 JSON 字段作为过滤器，也可以使用它的某些特定键。

注释

Milvus 将字符串值原封不动地存储在 JSON 字段中，而不执行语义转义或转换。

例如，'a"b' 、"a'b" 、'a\\\\'b' 和"a\\\\"b" 将按原样保存，而'a'b' 和"a"b" 将被视为无效值。

要使用 JSON 字段构建过滤表达式，可以利用字段中的键。
如果键值是整数或浮点数，则可以将其与另一个整数或浮点数键值或 INT32/64 或 FLOAT32/64 字段进行比较。
如果键值是字符串，则只能与另一个字符串键或 VARCHAR 字段进行比较。

JSON 字段中的基本操作符

下表假定名为json_key 的 JSON 字段的值有一个名为A 的键。在使用 JSON 字段键构建布尔表达式时，请将其作为参考。

操作符	示例	备注
<	`'json_field["A"] < 3'`	如果`json_field["A"]` 的值小于`3` ，则该表达式的值为 true。
>	`'json_field["A"] > 1'`	如果`json_field["A"]` 的值大于`1` ，则此表达式的值为 true。
==	`'json_field["A"] == 1'`	如果`json_field["A"]` 的值等于`1` ，则此表达式的值为真。
!=	`'json_field["A"][0]' != "abc"'`	如果 -`json_field` 没有名为`A` 的键，则此表达式的值为真。 -`json_field` 有一个名为`A` 的键，但`json_field["A"]` 不是数组。 -`json_field["A"]` 是一个空数组。 -`json_field["A"]` 是一个数组，但第一个元素不是`abc` 。
<=	`'json_field["A"] <= 5'`	如果`json_field["A"]` 的值小于或等于`5` ，则此表达式的值为 true。
>=	`'json_field["A"] >= 1'`	如果`json_field["A"]` 的值大于或等于`1` ，则此表达式的值为真。
不	`'not json_field["A"] == 1'`	如果 -`json_field` 没有名为`A` 的键，则此表达式的值为真。 -`json_field["A"]` 不等于`1`.
在	`'json_field["A"] in [1, 2, 3]'`	如果`json_field["A"]` 的值是`1`,`2` 或`3` ，则此表达式的值为 true。
和 (&&)	`'json_field["A"] > 1 && json_field["A"] < 3'`	如果`json_field["A"]` 的值大于 1 且小于`3` ，则此表达式的值为 true。
或 (\|\|)	`‘json_field[“A”] > 1 \|\| json_field[“A”] < 3’`	如果`json_field["A"]` 的值大于`1` 或小于`3` ，则此表达式的值为 true。
存在	`'exists json_field["A"]'`	如果`json_field` 有一个名为`A` 的键，则此表达式的值为真。

高级操作符

以下操作符专门针对 JSON 字段：

json_contains(identifier, jsonExpr)

此操作符可过滤标识符包含指定 JSON 表达式的实体。

例 1：{"x": [1,2,3]}

json_contains(x, 1) # => True (x contains 1.)
json_contains(x, "a") # => False (x does not contain a member "a".)

例 2：{"x", [[1,2,3], [4,5,6], [7,8,9]]}

json_contains(x, [1,2,3]) # => True (x contains [1,2,3].)
json_contains(x, [3,2,1]) # => False (x does contain a member [3,2,1].)

json_contains_all(identifier, jsonExpr)

此操作符可筛选标识符包含 JSON 表达式所有成员的实体。

示例 3{"x": [1,2,3,4,5,7,8]}
```
json_contains_all(x, [1,2,8]) # => True (x contains 1, 2, and 8.)
json_contains_all(x, [4,5,6]) # => False (x does not has a member 6.)
```
json_contains_any(identifier, jsonExpr)

此操作符可筛选标识符包含 JSON 表达式任意成员的实体。

示例 1：示例 2：此操作符可筛选标识符包含所有 JSON 表达式成员的实体：{"x": [1,2,3,4,5,7,8]}
```
json_contains_any(x, [1,2,8]) # => True (x contains 1, 2, and 8.)
json_contains_any(x, [4,5,6]) # => True (x contains 4 and 5.)
json_contains_any(x, [6,9]) # => False (x contains none of 6 and 9.)
```

翻译自 DeepLogo

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使用 JSON 字段

概述

定义 JSON 字段

插入字段值

基本标量过滤

高级标量过滤

JSON 过滤器参考

JSON 字段中的基本操作符

高级操作符

目录

想要更快、更简单、更好用的 Milvus SaaS服务 ？

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想要更快、更简单、更好用的 Milvus SaaS服务？