# GlobalSecondaryIndexUpdate
<a name="API_GlobalSecondaryIndexUpdate"></a>

Represents one of the following:
+ A new global secondary index to be added to an existing table.
+ New provisioned throughput parameters for an existing global secondary index.
+ An existing global secondary index to be removed from an existing table.

## Contents
<a name="API_GlobalSecondaryIndexUpdate_Contents"></a>

**Note**  
In the following list, the required parameters are described first.

 ** Create **   <a name="DDB-Type-GlobalSecondaryIndexUpdate-Create"></a>
The parameters required for creating a global secondary index on an existing table:  
+  `IndexName ` 
+  `KeySchema ` 
+  `AttributeDefinitions ` 
+  `Projection ` 
+  `ProvisionedThroughput ` 
Type: [CreateGlobalSecondaryIndexAction](API_CreateGlobalSecondaryIndexAction.md) object  
Required: No

 ** Delete **   <a name="DDB-Type-GlobalSecondaryIndexUpdate-Delete"></a>
The name of an existing global secondary index to be removed.  
Type: [DeleteGlobalSecondaryIndexAction](API_DeleteGlobalSecondaryIndexAction.md) object  
Required: No

 ** Update **   <a name="DDB-Type-GlobalSecondaryIndexUpdate-Update"></a>
The name of an existing global secondary index, along with new provisioned throughput settings to be applied to that index.  
Type: [UpdateGlobalSecondaryIndexAction](API_UpdateGlobalSecondaryIndexAction.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/dynamodb-2012-08-10/GlobalSecondaryIndexUpdate) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/dynamodb-2012-08-10/GlobalSecondaryIndexUpdate) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/dynamodb-2012-08-10/GlobalSecondaryIndexUpdate)