Why can StreamRecords be optional in Amazon DynamoDB streams

Question

Glossing at the documentation for DynamoDB Streams, I encountered that the dynamodb object is optional

https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_streams_Record.html

This seems intuitively to me like something that should always be defined and included? In which cases can I assume that it will be undefined?

Lee Hannigan · Answer

dynamodb will always be present. You are looking at API documentation, which states what parameters are required by you. As this is a read only object, none of the items listed are required.

Contrast that with Get and you will see that key is required as you must pass key parameter in the request.

Why can StreamRecords be optional in Amazon DynamoDB streams

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