Queries the parameters of a specified PolarDB cluster.


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Request parameters

Parameter Type Required Example Description
Action String Yes DescribeDBClusterParameters

The operation that you want to perform. Set the value to DescribeDBClusterParameters.

DBClusterId String Yes pc-**********

The ID of the cluster.

Response parameters

Parameter Type Example Description
RunningParameters Array of Parameter

The parameters that are in use.

CheckingCode String [utf8|latin1|gbk|utf8mb4]

The valid values of the parameter.

DataType String INT

The data type of the parameter value. Valid values:

  • INT
  • B
ParameterName String character_set_server

The name of the parameter.

ParameterValue String utf8

The value of the parameter.

ForceRestart Boolean true

Indicates whether a cluster restart is required to make the parameter modification take effect. Valid values:

  • false
  • true
ParameterDescription String The server's default character set.

The description of the parameter.

ParameterStatus String Normal

The status of the parameter. Valid values:

  • Normal
  • Modifying
DefaultParameterValue String utf8

The default value of the parameter.

IsModifiable Boolean true

Indicates whether the parameter setting can be modified. Valid values:

  • false
  • true
IsNodeAvailable String 0

Indicates whether the parameter is a global parameter. Valid values:

  • 0: yes. The modified parameter value is synchronized to other nodes by default.
  • 1: no. You can customize the nodes the modified parameter value can be synchronized to.
ParamRelyRule String utf8

The parameter dependencies.

Factor String 20

A divisor of an integer. For a parameter of the integer or byte type, the value must be a multiple of a factor (not equal to 0) in addition to within the specified range.

DBVersion String 5.6

The version of the database engine.

  • Valid values for the MySQL database engine:
    • 5.6
    • 5.7
    • 8.0
  • Valid value for the PostgreSQL database engine:
    • 11
    • 14
  • Valid value for the Oracle database engine: 11
RequestId String EBEAA83D-1734-42E3-85E3-E25F6E******

The ID of the request.

DBType String MySQL

The database engine that the cluster runs. Valid values:

  • MySQL
  • PostgreSQL
  • Oracle
Engine String POLARDB

The cluster engine.


Sample requests

&Common request parameters

Sample success responses

XML format

HTTP/1.1 200 OK

        <ParameterDescription>The server's default character set.</ParameterDescription>

JSON format

HTTP/1.1 200 OK

  "RunningParameters" : [ {
    "CheckingCode" : "[utf8|latin1|gbk|utf8mb4]",
    "DataType" : "INT",
    "ParameterName" : "character_set_server",
    "ParameterValue" : "utf8",
    "ForceRestart" : true,
    "ParameterDescription" : "The server's default character set.",
    "ParameterStatus" : "Normal",
    "DefaultParameterValue" : "utf8",
    "IsModifiable" : true,
    "IsNodeAvailable" : "0",
    "ParamRelyRule" : "utf8",
    "Factor" : "20"
  } ],
  "DBVersion" : "5.6",
  "RequestId" : "EBEAA83D-1734-42E3-85E3-E25F6E******",
  "DBType" : "MySQL",
  "Engine" : "POLARDB"

Error codes

HttpCode Error code Error message Description
400 InvalidDBClusterId.Malformed The specified parameter DBClusterId is not valid. The error message returned because the specified DBClusterId parameter is invalid.

For a list of error codes, visit the Error Center.