Queries the parameters of a specified PolarDB cluster.

Debugging

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Request parameters

Parameter Type Required Example Description
Action String No DescribeDBClusterParameters

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

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

The ID of the cluster.

Response parameters

Parameter Type Example Description
DBType String MySQL

The type of the database engine. Valid values:

  • MySQL
  • PostgreSQL
  • Oracle
DBVersion String 5.6

The version number of the database engine.

  • The valid values of MySQL version number:
    • 5.6
    • 5.7
    • 8.0
  • The version number of PostgreSQL: 11
  • The version number of Oracle: 11
Engine String POLARDB

The engine.
RequestId String EBEAA83D-1734-42E3-85E3-E25F6E******

The ID of the request.
RunningParameters Array of Parameter

The parameters that are in use.
Parameter
CheckingCode String [utf8|latin1|gbk|utf8mb4]

The valid values of a parameter.
DataType String INT

The data type of the parameter value.
DefaultParameterValue String utf8

The default value of the parameter.
ForceRestart Boolean true

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

  • False: A cluster restart is not required.
  • True: A cluster restart is required.
IsModifiable Boolean true

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

  • False: The parameter setting cannot be modified.
  • True: The parameter setting can be modified.
ParameterDescription String The server's default character set.

The description of the parameter.
ParameterName String character_set_server

The name of the parameter.
ParameterStatus String Normal

The status of the parameter. Valid values:

  • Normal: The parameter is in a normal state.
  • Modifying: The parameter is being modified.
ParameterValue String utf8

The value of parameter.

Examples

Sample requests

http(s)://polardb.aliyuncs.com/? Action=DescribeDBClusterParameters
&DBClusterId=pc-**********
&<Common request parameters>

Sample success responses

XML format 

<DescribeDBClusterParametersResponse>
  <RunningParameters>
        <Parameter>
              <ParameterStatus>Normal</ParameterStatus>
              <DefaultParameterValue>1</DefaultParameterValue>
              <IsModifiable>true</IsModifiable>
              <DataType>INT</DataType>
              <ParameterDescription>Auto-increment columns are incremented by this</ParameterDescription>
              <ParameterValue>1</ParameterValue>
              <CheckingCode>[1-65535]</CheckingCode>
              <ForceRestart>false</ForceRestart>
              <ParameterName>auto_increment_increment</ParameterName>
        </Parameter>
        <Parameter>
              <DefaultParameterValue>utf8</DefaultParameterValue>
              <IsModifiable>true</IsModifiable>
              <CheckingCode>[utf8|latin1|gbk|utf8mb4]</CheckingCode>
              <ParameterValue>utf8</ParameterValue>
              <ParameterStatus>Normal</ParameterStatus>
              <ForceRestart>true</ForceRestart>
              <DataType>STRING</DataType>
              <ParameterName>character_set_server</ParameterName>
              <ParameterDescription>The server's default character set. </ParameterDescription>
        </Parameter>
  </RunningParameters>
  <DBVersion>5.6</DBVersion>
  <RequestId>EBEAA83D-1734-42E3-85E3-E25F6E******</RequestId>
  <DBType>MySQL</DBType>
  <Engine>POLARDB</Engine>
</DescribeDBClusterParametersResponse>

JSON format 

{
    "RunningParameters": {
        "Parameter": [
            {
                "ParameterStatus": "Normal",
                "DefaultParameterValue": 1,
                "IsModifiable": true,
                "DataType": "INT",
                "ParameterDescription": "Auto-increment columns are incremented by this",
                "ParameterValue": 1,
                "CheckingCode": "[1-65535]",
                "ForceRestart": false,
                "ParameterName": "auto_increment_increment"
            },
            {
                "DefaultParameterValue": "utf8",
                "IsModifiable": true,
                "CheckingCode": "[utf8|latin1|gbk|utf8mb4]",
                "ParameterValue": "utf8",
                "ParameterStatus": "Normal",
                "ForceRestart": true,
                "DataType": "STRING",
                "ParameterName": "character_set_server",
                "ParameterDescription": "The server's default character set."
            }
        ]
    },
    "DBVersion": "5.6",
    "RequestId": "EBEAA83D-1734-42E3-85E3-E25F6E******",
    "DBType": "MySQL",
    "Engine": "POLARDB"
}

Error codes

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