ReturnConsumedCapacity Support for DynamoDB Transactions in DynamoDBContext and Table APIs#4412
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irina-herciu
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May 26, 2026
| /// </summary> | ||
| /// <param name="hashKey">Hash key of the item to get.</param> | ||
| void AddKey(object hashKey); | ||
| /// <param name="returnConsumedCapacity">Constants used for properties of type ReturnConsumedCapacity</param> |
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update summary with actual scope, but move it to TransactGetConfig
| } | ||
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| /// <inheritdoc/> | ||
| public void AddKeys(IEnumerable<T> keyObjects) |
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this should not default to null ReturnConsumedCapacity
| { | ||
| var transactItems = Items.Select(item => item.GetRequest()).ToList(); | ||
| var request = new TransactWriteItemsRequest { TransactItems = transactItems }; | ||
| var returnConsumedCapacity = |
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the ReturnConsumedCapacity should be part of the TransactWriteConfig and set only one time when CreateTransactWrite, not added for each item
| /// <param name="item">Item to save.</param> | ||
| void AddSaveItem(T item); | ||
| /// <param name="returnConsumedCapacity">Constants used for properties of type ReturnConsumedCapacity.</param> | ||
| void AddSaveItem(T item, ReturnConsumedCapacity returnConsumedCapacity = null); |
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move ReturnConsumedCapacity to config
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Description
Add ReturnConsumedCapacity support for DynamoDB transactional operations exposed through DynamoDBContext and Table-level APIs in the AWS SDK for .NET.
Currently, when executing transactions via high-level .NET abstractions (such as DynamoDBContext transactional APIs or Table-based helpers), there is no way to request or retrieve consumed capacity information. This capability is supported by DynamoDB itself and exposed in other SDKs, but is missing from the .NET high-level APIs.
Motivation and Context
I need this feature to understand and control the capacity cost of transactional workloads when using DynamoDB through DynamoDBContext.
Without ReturnConsumedCapacity:
Expose ReturnConsumedCapacity at the DynamoDBContext and Table abstraction level for transactional operations, in a way consistent with existing .NET SDK patterns.
Specifically:
Allow configuring ReturnConsumedCapacity when executing transactional reads and writes through DynamoDBContext
Surface consumed-capacity data in the transaction response
Include total and per-table capacity information, consistent with other DynamoDB APIs
This should not require customers to drop down to low-level TransactWriteItemsRequest / TransactGetItemsRequest APIs.
The AWS SDK for Java v2 Enhanced Client already supports this feature, providing a clear reference for API shape and behavior.
https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/enhanced/dynamodb/model/TransactWriteItemsEnhancedRequest.Builder.html
Testing
Screenshots (if appropriate)
Types of changes
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License