Obtaining Links for Downloading DDL Logs

Function

This API is used to obtain links for downloading DDL logs of a specified instance. Before calling this API:

Learn how to authenticate it.
Obtain the required region and endpoint.

Calling Method

For details, see Calling APIs.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions.

If you are using role/policy-based authorization, see Permissions and Supported Actions for details on the required permissions.

If you are using identity policy-based authorization, the following identity policy-based permissions are required.

Action	Access Level	Resource Type (*: required)	Condition Key	Alias	Dependency
gaussdbformysql:log:download	Write	instance *	g:EnterpriseProjectId g:ResourceTag/<tag-key>	gaussdb:log:download	-

URI

POST /v3/{project_id}/instances/{instance_id}/ddl-log/download

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition Project ID of a tenant in a region. To obtain this value, see Obtaining a Project ID. Constraints N/A Range The value contains 32 characters. Only letters and digits are allowed. Default Value N/A
instance_id	Yes	String	Definition Instance ID, which uniquely identifies an instance. To obtain this value, see Querying DB Instances. Constraints N/A Range The value contains 36 characters. Only letters, digits, and underscores (_) are allowed. Default Value N/A

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Definition User token. To obtain this value, call the IAM API for obtaining a user token. The value of X-Subject-Token in the response header is the token value. Constraints N/A Range N/A Default Value N/A
X-Language	No	String	Definition Request language type. Constraints N/A Range en-us: English zh-cn: Chinese Default Value en-us

**Table 3** Request body parameter
Parameter	Mandatory	Type	Description
log_ids	Yes	Array of strings	Definition List of DDL log file IDs. To obtain this value, see Querying DDL Logs That Can Be Downloaded. Constraints A maximum of 10 IDs are allowed.

Response Parameters

Status code: 200

**Table 4** Response body parameter
Parameter	Type	Description
list	Array of DownLoadFileInfoItem objects	Definition Details about the download link of each log file.

**Table 5** DownLoadFileInfoItem
Parameter	Type	Description
id	String	Definition Log file ID. Range N/A
file_name	String	Definition Log file name. Range N/A
file_size	Integer	Definition Log file size, in bytes. Range N/A
download_url	String	Definition Link for downloading the log file. Range N/A
expire_time	String	Definition Link expiration time, in yyyy-MM-dd HH:mm:ss format. Range N/A

Status code: 400

**Table 6** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 500

**Table 7** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Example Request

Obtaining links for downloading DDL logs

POST https://{endpoint}/v3/619d3e78f61b4be68bc5aa0b59edcf7b/instances/7e8dfe8f580043d4a424f65b51c0e1f0in07/ddl-log/download

{
  "log_ids" : [ "3541f39c185et4591ac5f602f60b28622br07" ]
}

Example Response

Status code: 200

Success.

[ {
  "download_url" : "https://dbs-0-cn-southwest-244-*************-common.***.********.**********.huawei.com:443/**************_7e8dfe8f580043d4a424f65b51c0e1f0in07/20260325/OmaLog/20260325190036_OmaLog?AWSAccessKeyId=****************&Expires=1774533318&response-cache-control=no-cache%2Cno-store&Signature=*************",
  "file_name" : "20260326090259_OmaLog",
  "file_size" : 1024000,
  "expire_time" : "2026-03-26 12:00:00"
} ]