查看 Collection

您可以获取当前连接的数据库中所有 Collection 的名称列表，并查看特定 Collection 的详细信息。

列出 Collection

下面的示例演示了如何获取当前连接的数据库中所有 Collection 的名称列表。

Python

from pymilvus import MilvusClient, DataType

client = MilvusClient(
    uri="http://localhost:19530",
    token="root:Milvus"
)

res = client.list_collections()

print(res)

Java

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.service.collection.response.ListCollectionsResp;

ConnectConfig connectConfig = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .token("root:Milvus")
        .build();

MilvusClientV2 client = new MilvusClientV2(connectConfig);

ListCollectionsResp resp = client.listCollections();
System.out.println(resp.getCollectionNames());

NodeJS

import { MilvusClient } from '@zilliz/milvus2-sdk-node';

const client = new MilvusClient({
    address: 'localhost:19530',
    token: 'root:Milvus'
});

const collections = await client.listCollections();
console.log(collections);

Go

import (
    "context"
    "fmt"

    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

ctx, cancel := context.WithCancel(context.Background())
defer cancel()

milvusAddr := "localhost:19530"
token := "root:Milvus"
client, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
    APIKey:  token,
})
if err != nil {
    fmt.Println(err.Error())
    // handle err
}
defer client.Close(ctx)

collectionNames, err := client.ListCollections(ctx, milvusclient.NewListCollectionOption())
if err != nil {
    fmt.Println(err.Error())
    // handle error
}

fmt.Println(collectionNames)

cURL

curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/vectordb/collections/list" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
-d '{}'

如果您已经创建了一个名为quick_setup 的 Collection，则上述示例的结果应类似于下面的内容。

["quick_setup"]

描述 Collection

您还可以获取特定 Collection 的详细信息。下面的示例假定您已经创建了名为 quick_setup 的 Collection。

Python

res = client.describe_collection(
    collection_name="quick_setup"
)

print(res)

Java

import io.milvus.v2.service.collection.request.DescribeCollectionReq;
import io.milvus.v2.service.collection.response.DescribeCollectionResp;

DescribeCollectionReq request = DescribeCollectionReq.builder()
        .collectionName("quick_setup")
        .build();
DescribeCollectionResp resp = client.describeCollection(request);
System.out.println(resp);

NodeJS

const res = await client.describeCollection({
    collection_name: "quick_setup"
});

console.log(res);

Go

collection, err := client.DescribeCollection(ctx, milvusclient.NewDescribeCollectionOption("quick_setup"))
if err != nil {
    fmt.Println(err.Error())
    // handle err
}

fmt.Println(collection)

cURL

curl --request POST \
--url "${CLUSTER_ENDPOINT}/v2/vectordb/collections/describe" \
--header "Authorization: Bearer ${TOKEN}" \
--header "Content-Type: application/json" \
-d '{
    "collectionName": "quick_setup"
}'

上述示例的结果应类似于下面的内容。

{
    'collection_name': 'quick_setup',
    'auto_id': False,
    'num_shards': 1,
    'description': '',
    'fields': [
        {
            'field_id': 100,
            'name': 'id',
            'description': '',
            'type': <DataType.INT64: 5>,
            'params': {},
            'is_primary': True
        },
        {
            'field_id': 101,
            'name': 'vector',
            'description': '',
            'type': <DataType.FLOAT_VECTOR: 101>,
            'params': {'dim': 768}
        }
    ],
    'functions': [],
    'aliases': [],
    'collection_id': 456909630285026300,
    'consistency_level': 2,
    'properties': {},
    'num_partitions': 1,
    'enable_dynamic_field': True
}