# 备份恢复到当前实例或已有实例 - RestoreOldInstance
#### 功能介绍
备份恢复到当前实例或已有实例。
#### 调用方法
请参见[如何调用API](https://support.huaweicloud.com/api-taurusdb/taurusdb_03_0000.html)。
#### 授权信息
账号具备所有API的调用权限，如果使用账号下的IAM用户调用当前API，该IAM用户需具备调用API所需的权限。
- 如果使用角色与策略授权，具体权限要求请参见[权限和授权项](https://support.huaweicloud.com/api-taurusdb/taurusdb_06_0000.html)。
- 如果使用身份策略授权，需具备如下身份策略权限。
  
  | 授权项                                     | 访问级别                  | 资源类型（\*为必须） | 条件键 | 别名                              | 依赖的授权项 |
  |:---|:---|:---|:---|:---|:---|
  | gaussdbformysql:instance:restoreInPlace | Permission_management | -           | -   | gaussdb:instance:restoreInPlace | -      |
     
  
 
#### URI
POST /v3/{project_id}/instances/restore
表1路径参数 
| 参数         | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|:---|:---|:---|:---|
| project_id | 是    | String | **参数解释**： 租户在某一Region下的project ID。 获取方法请参见[获取项目ID](https://support.huaweicloud.com/api-taurusdb/taurusdb_10_0004.html)。 **约束限制**： 不涉及。 **取值范围**： 只能由英文字母、数字组成，且长度为32个字符。 **默认值**： 不涉及。 |
   
#### 请求参数
表2请求Header参数 
| 参数           | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|:---|:---|:---|:---|
| X-Auth-Token | 是    | String | **参数解释**： 用户Token。 通过调用IAM服务[获取用户Token](https://support.huaweicloud.com/api-iam/iam_30_0001.html)接口获取。 请求响应成功后在响应消息头中包含的"X-Subject-Token"的值即为Token值。 **约束限制**： 不涉及。 **取值范围**： 不涉及。 **默认值**： 不涉及。                                                                                                                                                                 |
| X-Language   | 否    | String | **参数解释**： 请求语言类型。 **约束限制**： 不涉及。 **取值范围**： - en-us：英文。   - zh-cn：中文。    **默认取值**： en-us。 |
   
表3请求Body参数 
| 参数                 | 是否必选 | 参数类型   | 描述                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|:---|:---|:---|:---|
| target_instance_id | 是    | String | **参数解释**： 目标实例ID。 通过调用[查询实例列表](https://support.huaweicloud.com/api-taurusdb/ListGaussMySqlInstancesUnifyStatus.html)接口获取实例ID。 **约束限制**： 不涉及。 **取值范围**： 只能由英文字母、数字组成，后缀为in07，长度为36个字符。 **默认取值**： 不涉及。                                                                                                                                                                                                                                                                     |
| source_instance_id | 是    | String | **参数解释**： 源实例ID。 通过调用[查询实例列表](https://support.huaweicloud.com/api-taurusdb/ListGaussMySqlInstancesUnifyStatus.html)接口获取实例ID。 **约束限制**： 不涉及。 **取值范围**： 只能由英文字母、数字组成，后缀为in07，长度为36个字符。 **默认取值**： 不涉及。                                                                                                                                                                                                                                                                      |
| type               | 是    | String | **参数解释**： 表示恢复方式。 **约束限制**： 不涉及。 **取值范围**： - backup：表示使用备份文件恢复，按照此方式恢复时，"backup_id"必选。   - timestamp：表示按时间点恢复，按照此方式恢复时，"restore_time"必选。    **默认取值**： 不涉及。 |
| backup_id          | 否    | String | **参数解释**： 用于恢复的备份ID。当使用备份文件恢复时需要指定该参数。 获取方法请参见[查询指定实例全量备份列表](https://support.huaweicloud.com/api-taurusdb/ShowInstanceBackups.html)。 **约束限制**： 不涉及。 **取值范围**： 只能由英文字母、数字组成，后缀为br07，长度为36个字符。 **默认取值**： 不涉及。                                                                                                                                                                                                                                                              |
| restore_time       | 否    | Long   | **参数解释**： 备份时间点。 **约束限制**： 格式为UNIX时间戳，单位是毫秒，时区为UTC标准时区。传参时需要将对应时区的时间转为标准时区对应的时间戳，比如，北京时区的时间点需要-8h后再转为时间戳。 **取值范围**： 通过[查询可恢复时间段](https://support.huaweicloud.com/api-taurusdb/ShowBackupRestoreTime.html)获取。 **默认取值**： 不涉及。                                                                                                                                                                                                                                                                                    |
   
#### 响应参数
**状态码：200**
表4响应Body参数 
| 参数     | 参数类型   | 描述                                                                                                                                                |
|:---|:---|:---|
| job_id | String | **参数解释**： 工作流ID。 **取值范围**： 不涉及。 |
   
**状态码：400**
表5响应Body参数 
| 参数         | 参数类型   | 描述    |
|:---|:---|:---|
| error_code | String | 错误码。  |
| error_msg  | String | 错误消息。 |
   
**状态码：500**
表6响应Body参数 
| 参数         | 参数类型   | 描述    |
|:---|:---|:---|
| error_code | String | 错误码。  |
| error_msg  | String | 错误消息。 |
   
#### 请求示例
- 按备份文件恢复到当前实例。
  ```
  POST https://{endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/restore
  {
    "target_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "source_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "backup_id" : "7ffbf305376b4cbea0ae491257b6aaf9br07",
    "type" : "backup"
  }
  ```
  
- 按时间点恢复到当前实例。
  ```
  POST https://{endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/restore
  {
    "target_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "source_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "restore_time" : 1673852043000,
    "type" : "timestamp"
  }
  ```
  
- 按备份文件恢复到已有实例。
  ```
  POST https://{endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/restore
  {
    "target_instance_id" : "7033e7c3cf93438797d44ad7ae0a7d95in07",
    "source_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "backup_id" : "be4ddfd7e2b94640b5e2cb44efb30b22br07",
    "type" : "backup"
  }
  ```
  
- 按时间点恢复到已有实例。
  ```
  POST https://{endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/restore
  {
    "target_instance_id" : "7033e7c3cf93438797d44ad7ae0a7d95in07",
    "source_instance_id" : "690e08a7c3854c218df0e59de3b0c6cein07",
    "restore_time" : 1673852043000,
    "type" : "timestamp"
  }
  ```
  
 
#### 响应示例
**状态码：200**
```
{
  "job_id" : "dff1d289-4d03-4942-8b9f-463ea07c000d"
}
```
#### SDK代码示例
SDK代码示例如下。
- [Java]
  - 按备份文件恢复到当前实例。
    ```
    package com.huaweicloud.sdk.test;
    import com.huaweicloud.sdk.core.auth.ICredential;
    import com.huaweicloud.sdk.core.auth.BasicCredentials;
    import com.huaweicloud.sdk.core.exception.ConnectionException;
    import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
    import com.huaweicloud.sdk.core.exception.ServiceResponseException;
    import com.huaweicloud.sdk.gaussdb.v3.region.GaussDBRegion;
    import com.huaweicloud.sdk.gaussdb.v3.*;
    import com.huaweicloud.sdk.gaussdb.v3.model.*;
    public class RestoreOldInstanceSolution {
        public static void main(String[] args) {
            // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
            // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
            String ak = System.getenv("CLOUD_SDK_AK");
            String sk = System.getenv("CLOUD_SDK_SK");
            String projectId = "{project_id}";
            ICredential auth = new BasicCredentials()
                    .withProjectId(projectId)
                    .withAk(ak)
                    .withSk(sk);
            GaussDBClient client = GaussDBClient.newBuilder()
                    .withCredential(auth)
                    .withRegion(GaussDBRegion.valueOf("<YOUR REGION>"))
                    .build();
            RestoreOldInstanceRequest request = new RestoreOldInstanceRequest();
            RestoreRequest body = new RestoreRequest();
            body.withType("backup");
            body.withBackupId("7ffbf305376b4cbea0ae491257b6aaf9br07");
            body.withSourceInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            body.withTargetInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            request.withBody(body);
            try {
                RestoreOldInstanceResponse response = client.restoreOldInstance(request);
                System.out.println(response.toString());
            } catch (ConnectionException e) {
                e.printStackTrace();
            } catch (RequestTimeoutException e) {
                e.printStackTrace();
            } catch (ServiceResponseException e) {
                e.printStackTrace();
                System.out.println(e.getHttpStatusCode());
                System.out.println(e.getRequestId());
                System.out.println(e.getErrorCode());
                System.out.println(e.getErrorMsg());
            }
        }
    }
    ```
    
  
  - 按时间点恢复到当前实例。
    ```
    package com.huaweicloud.sdk.test;
    import com.huaweicloud.sdk.core.auth.ICredential;
    import com.huaweicloud.sdk.core.auth.BasicCredentials;
    import com.huaweicloud.sdk.core.exception.ConnectionException;
    import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
    import com.huaweicloud.sdk.core.exception.ServiceResponseException;
    import com.huaweicloud.sdk.gaussdb.v3.region.GaussDBRegion;
    import com.huaweicloud.sdk.gaussdb.v3.*;
    import com.huaweicloud.sdk.gaussdb.v3.model.*;
    public class RestoreOldInstanceSolution {
        public static void main(String[] args) {
            // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
            // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
            String ak = System.getenv("CLOUD_SDK_AK");
            String sk = System.getenv("CLOUD_SDK_SK");
            String projectId = "{project_id}";
            ICredential auth = new BasicCredentials()
                    .withProjectId(projectId)
                    .withAk(ak)
                    .withSk(sk);
            GaussDBClient client = GaussDBClient.newBuilder()
                    .withCredential(auth)
                    .withRegion(GaussDBRegion.valueOf("<YOUR REGION>"))
                    .build();
            RestoreOldInstanceRequest request = new RestoreOldInstanceRequest();
            RestoreRequest body = new RestoreRequest();
            body.withType("timestamp");
            body.withRestoreTime(1673852043000L);
            body.withSourceInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            body.withTargetInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            request.withBody(body);
            try {
                RestoreOldInstanceResponse response = client.restoreOldInstance(request);
                System.out.println(response.toString());
            } catch (ConnectionException e) {
                e.printStackTrace();
            } catch (RequestTimeoutException e) {
                e.printStackTrace();
            } catch (ServiceResponseException e) {
                e.printStackTrace();
                System.out.println(e.getHttpStatusCode());
                System.out.println(e.getRequestId());
                System.out.println(e.getErrorCode());
                System.out.println(e.getErrorMsg());
            }
        }
    }
    ```
    
  
  - 按备份文件恢复到已有实例。
    ```
    package com.huaweicloud.sdk.test;
    import com.huaweicloud.sdk.core.auth.ICredential;
    import com.huaweicloud.sdk.core.auth.BasicCredentials;
    import com.huaweicloud.sdk.core.exception.ConnectionException;
    import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
    import com.huaweicloud.sdk.core.exception.ServiceResponseException;
    import com.huaweicloud.sdk.gaussdb.v3.region.GaussDBRegion;
    import com.huaweicloud.sdk.gaussdb.v3.*;
    import com.huaweicloud.sdk.gaussdb.v3.model.*;
    public class RestoreOldInstanceSolution {
        public static void main(String[] args) {
            // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
            // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
            String ak = System.getenv("CLOUD_SDK_AK");
            String sk = System.getenv("CLOUD_SDK_SK");
            String projectId = "{project_id}";
            ICredential auth = new BasicCredentials()
                    .withProjectId(projectId)
                    .withAk(ak)
                    .withSk(sk);
            GaussDBClient client = GaussDBClient.newBuilder()
                    .withCredential(auth)
                    .withRegion(GaussDBRegion.valueOf("<YOUR REGION>"))
                    .build();
            RestoreOldInstanceRequest request = new RestoreOldInstanceRequest();
            RestoreRequest body = new RestoreRequest();
            body.withType("backup");
            body.withBackupId("be4ddfd7e2b94640b5e2cb44efb30b22br07");
            body.withSourceInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            body.withTargetInstanceId("7033e7c3cf93438797d44ad7ae0a7d95in07");
            request.withBody(body);
            try {
                RestoreOldInstanceResponse response = client.restoreOldInstance(request);
                System.out.println(response.toString());
            } catch (ConnectionException e) {
                e.printStackTrace();
            } catch (RequestTimeoutException e) {
                e.printStackTrace();
            } catch (ServiceResponseException e) {
                e.printStackTrace();
                System.out.println(e.getHttpStatusCode());
                System.out.println(e.getRequestId());
                System.out.println(e.getErrorCode());
                System.out.println(e.getErrorMsg());
            }
        }
    }
    ```
    
  
  - 按时间点恢复到已有实例。
    ```
    package com.huaweicloud.sdk.test;
    import com.huaweicloud.sdk.core.auth.ICredential;
    import com.huaweicloud.sdk.core.auth.BasicCredentials;
    import com.huaweicloud.sdk.core.exception.ConnectionException;
    import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
    import com.huaweicloud.sdk.core.exception.ServiceResponseException;
    import com.huaweicloud.sdk.gaussdb.v3.region.GaussDBRegion;
    import com.huaweicloud.sdk.gaussdb.v3.*;
    import com.huaweicloud.sdk.gaussdb.v3.model.*;
    public class RestoreOldInstanceSolution {
        public static void main(String[] args) {
            // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
            // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
            String ak = System.getenv("CLOUD_SDK_AK");
            String sk = System.getenv("CLOUD_SDK_SK");
            String projectId = "{project_id}";
            ICredential auth = new BasicCredentials()
                    .withProjectId(projectId)
                    .withAk(ak)
                    .withSk(sk);
            GaussDBClient client = GaussDBClient.newBuilder()
                    .withCredential(auth)
                    .withRegion(GaussDBRegion.valueOf("<YOUR REGION>"))
                    .build();
            RestoreOldInstanceRequest request = new RestoreOldInstanceRequest();
            RestoreRequest body = new RestoreRequest();
            body.withType("timestamp");
            body.withRestoreTime(1673852043000L);
            body.withSourceInstanceId("690e08a7c3854c218df0e59de3b0c6cein07");
            body.withTargetInstanceId("7033e7c3cf93438797d44ad7ae0a7d95in07");
            request.withBody(body);
            try {
                RestoreOldInstanceResponse response = client.restoreOldInstance(request);
                System.out.println(response.toString());
            } catch (ConnectionException e) {
                e.printStackTrace();
            } catch (RequestTimeoutException e) {
                e.printStackTrace();
            } catch (ServiceResponseException e) {
                e.printStackTrace();
                System.out.println(e.getHttpStatusCode());
                System.out.println(e.getRequestId());
                System.out.println(e.getErrorCode());
                System.out.println(e.getErrorMsg());
            }
        }
    }
    ```
    
   
- [Python]
  - 按备份文件恢复到当前实例。
    ```
    # coding: utf-8
    import os
    from huaweicloudsdkcore.auth.credentials import BasicCredentials
    from huaweicloudsdkgaussdb.v3.region.gaussdb_region import GaussDBRegion
    from huaweicloudsdkcore.exceptions import exceptions
    from huaweicloudsdkgaussdb.v3 import *
    if __name__ == "__main__":
        # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak = os.environ["CLOUD_SDK_AK"]
        sk = os.environ["CLOUD_SDK_SK"]
        projectId = "{project_id}"
        credentials = BasicCredentials(ak, sk, projectId)
        client = GaussDBClient.new_builder() \
            .with_credentials(credentials) \
            .with_region(GaussDBRegion.value_of("<YOUR REGION>")) \
            .build()
        try:
            request = RestoreOldInstanceRequest()
            request.body = RestoreRequest(
                type="backup",
                backup_id="7ffbf305376b4cbea0ae491257b6aaf9br07",
                source_instance_id="690e08a7c3854c218df0e59de3b0c6cein07",
                target_instance_id="690e08a7c3854c218df0e59de3b0c6cein07"
            )
            response = client.restore_old_instance(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    ```
    
  
  - 按时间点恢复到当前实例。
    ```
    # coding: utf-8
    import os
    from huaweicloudsdkcore.auth.credentials import BasicCredentials
    from huaweicloudsdkgaussdb.v3.region.gaussdb_region import GaussDBRegion
    from huaweicloudsdkcore.exceptions import exceptions
    from huaweicloudsdkgaussdb.v3 import *
    if __name__ == "__main__":
        # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak = os.environ["CLOUD_SDK_AK"]
        sk = os.environ["CLOUD_SDK_SK"]
        projectId = "{project_id}"
        credentials = BasicCredentials(ak, sk, projectId)
        client = GaussDBClient.new_builder() \
            .with_credentials(credentials) \
            .with_region(GaussDBRegion.value_of("<YOUR REGION>")) \
            .build()
        try:
            request = RestoreOldInstanceRequest()
            request.body = RestoreRequest(
                type="timestamp",
                restore_time=1673852043000,
                source_instance_id="690e08a7c3854c218df0e59de3b0c6cein07",
                target_instance_id="690e08a7c3854c218df0e59de3b0c6cein07"
            )
            response = client.restore_old_instance(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    ```
    
  
  - 按备份文件恢复到已有实例。
    ```
    # coding: utf-8
    import os
    from huaweicloudsdkcore.auth.credentials import BasicCredentials
    from huaweicloudsdkgaussdb.v3.region.gaussdb_region import GaussDBRegion
    from huaweicloudsdkcore.exceptions import exceptions
    from huaweicloudsdkgaussdb.v3 import *
    if __name__ == "__main__":
        # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak = os.environ["CLOUD_SDK_AK"]
        sk = os.environ["CLOUD_SDK_SK"]
        projectId = "{project_id}"
        credentials = BasicCredentials(ak, sk, projectId)
        client = GaussDBClient.new_builder() \
            .with_credentials(credentials) \
            .with_region(GaussDBRegion.value_of("<YOUR REGION>")) \
            .build()
        try:
            request = RestoreOldInstanceRequest()
            request.body = RestoreRequest(
                type="backup",
                backup_id="be4ddfd7e2b94640b5e2cb44efb30b22br07",
                source_instance_id="690e08a7c3854c218df0e59de3b0c6cein07",
                target_instance_id="7033e7c3cf93438797d44ad7ae0a7d95in07"
            )
            response = client.restore_old_instance(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    ```
    
  
  - 按时间点恢复到已有实例。
    ```
    # coding: utf-8
    import os
    from huaweicloudsdkcore.auth.credentials import BasicCredentials
    from huaweicloudsdkgaussdb.v3.region.gaussdb_region import GaussDBRegion
    from huaweicloudsdkcore.exceptions import exceptions
    from huaweicloudsdkgaussdb.v3 import *
    if __name__ == "__main__":
        # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak = os.environ["CLOUD_SDK_AK"]
        sk = os.environ["CLOUD_SDK_SK"]
        projectId = "{project_id}"
        credentials = BasicCredentials(ak, sk, projectId)
        client = GaussDBClient.new_builder() \
            .with_credentials(credentials) \
            .with_region(GaussDBRegion.value_of("<YOUR REGION>")) \
            .build()
        try:
            request = RestoreOldInstanceRequest()
            request.body = RestoreRequest(
                type="timestamp",
                restore_time=1673852043000,
                source_instance_id="690e08a7c3854c218df0e59de3b0c6cein07",
                target_instance_id="7033e7c3cf93438797d44ad7ae0a7d95in07"
            )
            response = client.restore_old_instance(request)
            print(response)
        except exceptions.ClientRequestException as e:
            print(e.status_code)
            print(e.request_id)
            print(e.error_code)
            print(e.error_msg)
    ```
    
   
- [Go]
  - 按备份文件恢复到当前实例。
    ```
    package main
    import (
    "fmt"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
        gaussdb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/model"
        region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/region"
    )
    func main() {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak := os.Getenv("CLOUD_SDK_AK")
        sk := os.Getenv("CLOUD_SDK_SK")
        projectId := "{project_id}"
        auth, err := basic.NewCredentialsBuilder().
            WithAk(ak).
            WithSk(sk).
            WithProjectId(projectId).
            SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        hcClient, err := gaussdb.GaussDBClientBuilder().
             WithRegion(region.ValueOf("<YOUR REGION>")).
             WithCredential(auth).
             SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        client := gaussdb.NewGaussDBClient(hcClient)
        request := &model.RestoreOldInstanceRequest{}
    backupIdRestoreRequest:= "7ffbf305376b4cbea0ae491257b6aaf9br07"
    request.Body = &model.RestoreRequest{
    Type: "backup",
    BackupId: &backupIdRestoreRequest,
    SourceInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    TargetInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    }
    response, err := client.RestoreOldInstance(request)
    if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    ```
    
  
  - 按时间点恢复到当前实例。
    ```
    package main
    import (
    "fmt"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
        gaussdb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/model"
        region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/region"
    )
    func main() {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak := os.Getenv("CLOUD_SDK_AK")
        sk := os.Getenv("CLOUD_SDK_SK")
        projectId := "{project_id}"
        auth, err := basic.NewCredentialsBuilder().
            WithAk(ak).
            WithSk(sk).
            WithProjectId(projectId).
            SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        hcClient, err := gaussdb.GaussDBClientBuilder().
             WithRegion(region.ValueOf("<YOUR REGION>")).
             WithCredential(auth).
             SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        client := gaussdb.NewGaussDBClient(hcClient)
        request := &model.RestoreOldInstanceRequest{}
    restoreTimeRestoreRequest:= int64(1673852043000)
    request.Body = &model.RestoreRequest{
    Type: "timestamp",
    RestoreTime: &restoreTimeRestoreRequest,
    SourceInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    TargetInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    }
    response, err := client.RestoreOldInstance(request)
    if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    ```
    
  
  - 按备份文件恢复到已有实例。
    ```
    package main
    import (
    "fmt"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
        gaussdb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/model"
        region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/region"
    )
    func main() {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak := os.Getenv("CLOUD_SDK_AK")
        sk := os.Getenv("CLOUD_SDK_SK")
        projectId := "{project_id}"
        auth, err := basic.NewCredentialsBuilder().
            WithAk(ak).
            WithSk(sk).
            WithProjectId(projectId).
            SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        hcClient, err := gaussdb.GaussDBClientBuilder().
             WithRegion(region.ValueOf("<YOUR REGION>")).
             WithCredential(auth).
             SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        client := gaussdb.NewGaussDBClient(hcClient)
        request := &model.RestoreOldInstanceRequest{}
    backupIdRestoreRequest:= "be4ddfd7e2b94640b5e2cb44efb30b22br07"
    request.Body = &model.RestoreRequest{
    Type: "backup",
    BackupId: &backupIdRestoreRequest,
    SourceInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    TargetInstanceId: "7033e7c3cf93438797d44ad7ae0a7d95in07",
    }
    response, err := client.RestoreOldInstance(request)
    if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    ```
    
  
  - 按时间点恢复到已有实例。
    ```
    package main
    import (
    "fmt"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
        gaussdb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3"
    "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/model"
        region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/region"
    )
    func main() {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        ak := os.Getenv("CLOUD_SDK_AK")
        sk := os.Getenv("CLOUD_SDK_SK")
        projectId := "{project_id}"
        auth, err := basic.NewCredentialsBuilder().
            WithAk(ak).
            WithSk(sk).
            WithProjectId(projectId).
            SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        hcClient, err := gaussdb.GaussDBClientBuilder().
             WithRegion(region.ValueOf("<YOUR REGION>")).
             WithCredential(auth).
             SafeBuild()
        if err != nil {
            fmt.Println(err)
            return
        }
        client := gaussdb.NewGaussDBClient(hcClient)
        request := &model.RestoreOldInstanceRequest{}
    restoreTimeRestoreRequest:= int64(1673852043000)
    request.Body = &model.RestoreRequest{
    Type: "timestamp",
    RestoreTime: &restoreTimeRestoreRequest,
    SourceInstanceId: "690e08a7c3854c218df0e59de3b0c6cein07",
    TargetInstanceId: "7033e7c3cf93438797d44ad7ae0a7d95in07",
    }
    response, err := client.RestoreOldInstance(request)
    if err == nil {
            fmt.Printf("%+v\n", response)
        } else {
            fmt.Println(err)
        }
    }
    ```
    
   
- [更多]
  更多编程语言的SDK代码示例，请参见[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/GaussDB/sdk?api=RestoreOldInstance)的代码示例页签，可生成自动对应的SDK代码示例。
#### 状态码
| 状态码 | 描述            |
|:---|:---|
| 200 | Success.      |
| 400 | Client error. |
| 500 | Server error. |
   
#### 错误码
请参见[错误码](https://support.huaweicloud.com/api-taurusdb/ErrorCode.html)。
