# SetDefaultPolicyVersion
<a name="API_SetDefaultPolicyVersion"></a>

Sets the specified version of the specified policy as the policy's default (operative) version.

This operation affects all users, groups, and roles that the policy is attached to. To list the users, groups, and roles that the policy is attached to, use [ListEntitiesForPolicy](https://docs.amazonaws.cn/IAM/latest/APIReference/API_ListEntitiesForPolicy.html).

For information about managed policies, see [Managed policies and inline policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/policies-managed-vs-inline.html) in the *IAM User Guide*.

## Request Parameters
<a name="API_SetDefaultPolicyVersion_RequestParameters"></a>

 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 ** PolicyArn **   
The Amazon Resource Name (ARN) of the IAM policy whose default version you want to set.  
For more information about ARNs, see [Amazon Resource Names (ARNs)](https://docs.amazonaws.cn/general/latest/gr/aws-arns-and-namespaces.html) in the * Amazon General Reference*.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Required: Yes

 ** VersionId **   
The version of the policy to set as the default (operative) version.  
For more information about managed policy versions, see [Versioning for managed policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/policies-managed-versions.html) in the *IAM User Guide*.  
Type: String  
Pattern: `v[1-9][0-9]*(\.[A-Za-z0-9-]*)?`   
Required: Yes

## Errors
<a name="API_SetDefaultPolicyVersion_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** InvalidInput **   
The request was rejected because an invalid or out-of-range value was supplied for an input parameter.  
HTTP Status Code: 400

 ** LimitExceeded **   
The request was rejected because it attempted to create resources beyond the current Amazon Web Services account limits. The error message describes the limit exceeded.  
HTTP Status Code: 409

 ** NoSuchEntity **   
The request was rejected because it referenced a resource entity that does not exist. The error message describes the resource.  
HTTP Status Code: 404

 ** ServiceFailure **   
The request processing has failed because of an unknown error, exception or failure.  
HTTP Status Code: 500

## Examples
<a name="API_SetDefaultPolicyVersion_Examples"></a>

### Example
<a name="API_SetDefaultPolicyVersion_Example_1"></a>

This example illustrates one usage of SetDefaultPolicyVersion.

#### Sample Request
<a name="API_SetDefaultPolicyVersion_Example_1_Request"></a>

```
https://iam.amazonaws.com/?Action=SetDefaultPolicyVersion
&PolicyArn=arn:aws:iam::123456789012:policy/S3-read-only-example-bucket
&VersionId=v3
&Version=2010-05-08
&AUTHPARAMS
```

#### Sample Response
<a name="API_SetDefaultPolicyVersion_Example_1_Response"></a>

```
<SetDefaultPolicyVersionResponse xmlns="https://iam.amazonaws.com/doc/2010-05-08/">
  <ResponseMetadata>
    <RequestId>35f241af-3ebc-11e4-9d0d-6f969EXAMPLE</RequestId>
  </ResponseMetadata>
</SetDefaultPolicyVersionResponse>
```

## See Also
<a name="API_SetDefaultPolicyVersion_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/iam-2010-05-08/SetDefaultPolicyVersion) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/iam-2010-05-08/SetDefaultPolicyVersion)