Modifying the Description of a DB Instance

This API is used to modify the description of a DB instance. Before calling this API:

PUT /v3/{project_id}/instances/{instance_id}/alias

**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. Constraints N/A Range The value contains 36 characters with a suffix of in07. Only letters and digits are allowed. Default Value N/A

**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 zh-cn Default Value en-us

**Table 3** Request body parameter
Parameter	Mandatory	Type	Description
alias	Yes	String	Definition Instance description. Constraints N/A Range The value can contain 0 to 64 characters. Only letters, digits, periods (.), underscores (_), hyphens (-), and spaces are supported. The value cannot start or end with a space. Default Value N/A

Status code: 200

Success.

Status code: 400

**Table 4** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 500

**Table 5** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Modifying the description of a DB instance to Test_alias

PUT https://{endpoint}/v3/056538411200d4cd2f79c003c7606412/instances/096c0fc43e804757b59946b80dc27f8bin07/alias
{
  "alias" : "Test_alias"
}

Status code: 200

Success.

{ }

For details, see Status Codes.

For details, see Error Codes.

Parent topic: Instance Management

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