检索Vectors（Go SDK V2）

权限说明

阿里云账号默认拥有全部权限。阿里云账号下的RAM用户或RAM角色默认没有任何权限，需要阿里云账号或账号管理员通过RAM Policy或Bucket Policy授予操作权限。

方法定义

func (c *VectorsClient) QueryVectors(ctx context.Context, request *QueryVectorsRequest, optFns ...func(*oss.Options)) (*QueryVectorsResult, error) 

请求参数列表

返回值列表

示例代码

package main

import (
	"context"
	"flag"
	"log"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/vectors"
)

var (
	region     string
	bucketName string
	accountId  string
	indexName  string
)

func init() {
	flag.StringVar(&region, "region", "", "The region in which the vector bucket is located.")
	flag.StringVar(&bucketName, "bucket", "", "The name of the vector bucket.")
	flag.StringVar(&accountId, "account-id", "", "The id of vector account.")
	flag.StringVar(&indexName, "index", "", "The name of vector index.")
}

func main() {
	flag.Parse()
	if len(bucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, bucket name required")
	}

	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}

	if len(accountId) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, accounId required")
	}

	if len(indexName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, index required")
	}

	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region).WithAccountId(accountId)

	client := vectors.NewVectorsClient(cfg)

	request := &vectors.QueryVectorsRequest{
		Bucket:    oss.Ptr(bucketName),
		IndexName: oss.Ptr(indexName),
		Filter: map[string]any{
			"$and": []map[string]any{
				{
					"type": map[string]any{
						"$in": []string{"comedy", "documentary"},
					},
				},
			},
		},
		QueryVector: map[string]any{
			"float32": []float32{float32(32)},
		},
		ReturnMetadata: oss.Ptr(true),
		ReturnDistance: oss.Ptr(true),
		TopK:           oss.Ptr(10),
	}
	result, err := client.QueryVectors(context.TODO(), request)
	if err != nil {
		log.Fatalf("failed to query vectors %v", err)
	}
	log.Printf("query vectors result:%#v\n", result)
}

相关文档

关于查询向量的完整示例代码，请参见query_vectors.go。