Function

This API is used to modify parameters in the parameter template of a specified DB instance.

• Before calling an API, you need to understand the API in Authentication.
• Before calling this API, obtain the required region and endpoint.

Constraints

• The following DB engines are supported: MySQL, PostgreSQL, and Microsoft SQL Server.

• The values of the edited parameters must be within the default value range of the specified database version. For details about the range of parameter values, see "Modifying Parameters in a Parameter Template" in the Relational Database Service User Guide.
• Modifying sensitive parameters, for example, lower_case_table_names, may have risks. For details, see Precautions for Modifying MySQL Parameters in the Relational Database User Guide.

URI

• URI format

  PUT https://{Endpoint}/v3/{project_id}/instances/{instance_id}/configurations

• Example

  https://rds.cn-north-1.myhuaweicloud.com/v3/0483b6b16e954cb88930a360d2c4e663/instances/dsfae23fsfdsae3435in01/configurations

• Parameter description

  Table 1 Parameter description

  Name	Mandatory	Description
  project_id	Yes	Specifies the project ID of a tenant in a region. For details about how to obtain the project ID, see Obtaining a Project ID.
  instance_id	Yes	Specifies the DB instance ID.

Request

• Parameter description

  Table 2 Parameter description

  Name	Mandatory	Type	Description
  values	Yes	Map<String,String>	Specifies the parameter values defined by users based on the default parameter templates. For details, see Table 3.

  Table 3 values field data structure description

  Name	Mandatory	Type	Description
  key	Yes	String	Specifies the parameter name. For example, in "max_connections": "10", the key is max_connections.
  value	Yes	String	Specifies the parameter value. For example, in "max_connections": "10", the value is 10.

• Request example

  { 
      "values": { 
         "xxx": "10", 
         "yyy": "OFF" 
      }
  }

Response

• Normal response

  Table 4 Parameter description

  Name	Type	Description
  restart_required	Boolean	Indicates whether a reboot is required. true: A reboot is required. false: A reboot is not required.

• Example normal response

  {
    "restart_required": false
  }

• Abnormal response

  For details, see Abnormal Request Results.

Status Code

For details, see Status Codes.

Error Code

For details, see Error Codes.