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[ aws . rds ]



Returns the default engine and system parameter information for the specified database engine.

See also: AWS API Documentation

describe-engine-default-parameters is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: EngineDefaults.Parameters


--db-parameter-group-family <value>
[--filters <value>]
[--cli-input-json <value>]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]
[--endpoint-url <value>]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]


--db-parameter-group-family (string)

The name of the DB parameter group family.

Valid Values:

  • aurora-mysql5.7
  • aurora-mysql8.0
  • aurora-postgresql10
  • aurora-postgresql11
  • aurora-postgresql12
  • aurora-postgresql13
  • aurora-postgresql14
  • custom-oracle-ee-19
  • custom-oracle-ee-cdb-19
  • db2-ae
  • db2-se
  • mariadb10.2
  • mariadb10.3
  • mariadb10.4
  • mariadb10.5
  • mariadb10.6
  • mysql5.7
  • mysql8.0
  • oracle-ee-19
  • oracle-ee-cdb-19
  • oracle-ee-cdb-21
  • oracle-se2-19
  • oracle-se2-cdb-19
  • oracle-se2-cdb-21
  • postgres10
  • postgres11
  • postgres12
  • postgres13
  • postgres14
  • sqlserver-ee-11.0
  • sqlserver-ee-12.0
  • sqlserver-ee-13.0
  • sqlserver-ee-14.0
  • sqlserver-ee-15.0
  • sqlserver-ex-11.0
  • sqlserver-ex-12.0
  • sqlserver-ex-13.0
  • sqlserver-ex-14.0
  • sqlserver-ex-15.0
  • sqlserver-se-11.0
  • sqlserver-se-12.0
  • sqlserver-se-13.0
  • sqlserver-se-14.0
  • sqlserver-se-15.0
  • sqlserver-web-11.0
  • sqlserver-web-12.0
  • sqlserver-web-13.0
  • sqlserver-web-14.0
  • sqlserver-web-15.0

--filters (list)

This parameter isn't currently supported.


A filter name and value pair that is used to return a more specific list of results from a describe operation. Filters can be used to match a set of resources by specific criteria, such as IDs. The filters supported by a describe operation are documented with the describe operation.


Currently, wildcards are not supported in filters.

The following actions can be filtered:

  • DescribeDBClusterBacktracks
  • DescribeDBClusterEndpoints
  • DescribeDBClusters
  • DescribeDBInstances
  • DescribeDBRecommendations
  • DescribeDBShardGroups
  • DescribePendingMaintenanceActions

Name -> (string)

The name of the filter. Filter names are case-sensitive.

Values -> (list)

One or more filter values. Filter values are case-sensitive.


Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

    "Name": "string",
    "Values": ["string", ...]

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command's output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command's output. If the total number of items available is more than the value specified, a NextToken is provided in the command's output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination.

--output (string)

The formatting style for command output.

  • json
  • text
  • table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

  • on
  • off
  • auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.



To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal's quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To describe the default engine and system parameter information for the database engine

The following describe-engine-default-parameters example retrieves details for the default engine and system parameter information for MySQL 5.7 DB instances.

aws rds describe-engine-default-parameters \
    --db-parameter-group-family mysql5.7


    "EngineDefaults": {
        "Parameters": [
                "ParameterName": "allow-suspicious-udfs",
                "Description": "Controls whether user-defined functions that have only an xxx symbol for the main function can be loaded",
                "Source": "engine-default",
                "ApplyType": "static",
                "DataType": "boolean",
                "AllowedValues": "0,1",
                "IsModifiable": false
            ...some output truncated...

For more information, see Working with DB Parameter Groups in the Amazon RDS User Guide.


EngineDefaults -> (structure)

Contains the result of a successful invocation of the DescribeEngineDefaultParameters action.

DBParameterGroupFamily -> (string)

Specifies the name of the DB parameter group family that the engine default parameters apply to.

Marker -> (string)

An optional pagination token provided by a previous EngineDefaults request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords .

Parameters -> (list)

Contains a list of engine default parameters.


This data type is used as a request parameter in the ModifyDBParameterGroup and ResetDBParameterGroup actions.

This data type is used as a response element in the DescribeEngineDefaultParameters and DescribeDBParameters actions.

ParameterName -> (string)

The name of the parameter.

ParameterValue -> (string)

The value of the parameter.

Description -> (string)

Provides a description of the parameter.

Source -> (string)

The source of the parameter value.

ApplyType -> (string)

Specifies the engine specific parameters type.

DataType -> (string)

Specifies the valid data type for the parameter.

AllowedValues -> (string)

Specifies the valid range of values for the parameter.

IsModifiable -> (boolean)

Indicates whether (true ) or not (false ) the parameter can be modified. Some parameters have security or operational implications that prevent them from being changed.

MinimumEngineVersion -> (string)

The earliest engine version to which the parameter can apply.

ApplyMethod -> (string)

Indicates when to apply parameter updates.

SupportedEngineModes -> (list)

The valid DB engine modes.