# DescribeTrainingPlanExtensionHistory
<a name="API_DescribeTrainingPlanExtensionHistory"></a>

Retrieves the extension history for a specified training plan. The response includes details about each extension, such as the offering ID, start and end dates, status, payment status, and cost information.

## Request Syntax
<a name="API_DescribeTrainingPlanExtensionHistory_RequestSyntax"></a>

```
{
   "MaxResults": number,
   "NextToken": "string",
   "TrainingPlanArn": "string"
}
```

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

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

The request accepts the following data in JSON format.

 ** [MaxResults](#API_DescribeTrainingPlanExtensionHistory_RequestSyntax) **   <a name="sagemaker-DescribeTrainingPlanExtensionHistory-request-MaxResults"></a>
The maximum number of extensions to return in the response.  
Type: Integer  
Valid Range: Minimum value of 1. Maximum value of 100.  
Required: No

 ** [NextToken](#API_DescribeTrainingPlanExtensionHistory_RequestSyntax) **   <a name="sagemaker-DescribeTrainingPlanExtensionHistory-request-NextToken"></a>
A token to continue pagination if more results are available.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 8192.  
Pattern: `.*`   
Required: No

 ** [TrainingPlanArn](#API_DescribeTrainingPlanExtensionHistory_RequestSyntax) **   <a name="sagemaker-DescribeTrainingPlanExtensionHistory-request-TrainingPlanArn"></a>
The Amazon Resource Name (ARN); of the training plan to retrieve extension history for.  
Type: String  
Length Constraints: Minimum length of 50. Maximum length of 2048.  
Pattern: `arn:aws[a-z\-]*:sagemaker:[a-z0-9\-]*:[0-9]{12}:training-plan/.*`   
Required: Yes

## Response Syntax
<a name="API_DescribeTrainingPlanExtensionHistory_ResponseSyntax"></a>

```
{
   "NextToken": "string",
   "TrainingPlanExtensions": [ 
      { 
         "AvailabilityZone": "string",
         "AvailabilityZoneId": "string",
         "CurrencyCode": "string",
         "DurationHours": number,
         "EndDate": number,
         "ExtendedAt": number,
         "PaymentStatus": "string",
         "StartDate": number,
         "Status": "string",
         "TrainingPlanExtensionOfferingId": "string",
         "UpfrontFee": "string"
      }
   ]
}
```

## Response Elements
<a name="API_DescribeTrainingPlanExtensionHistory_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [NextToken](#API_DescribeTrainingPlanExtensionHistory_ResponseSyntax) **   <a name="sagemaker-DescribeTrainingPlanExtensionHistory-response-NextToken"></a>
A token to continue pagination if more results are available.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 8192.  
Pattern: `.*` 

 ** [TrainingPlanExtensions](#API_DescribeTrainingPlanExtensionHistory_ResponseSyntax) **   <a name="sagemaker-DescribeTrainingPlanExtensionHistory-response-TrainingPlanExtensions"></a>
A list of extensions for the specified training plan.  
Type: Array of [TrainingPlanExtension](API_TrainingPlanExtension.md) objects  
Array Members: Minimum number of 0 items.

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

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

 ** ResourceNotFound **   
Resource being access is not found.  
HTTP Status Code: 400

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

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/sagemaker-2017-07-24/DescribeTrainingPlanExtensionHistory)