Enabling DynamoDB streams give us the possibility to call a lambda function as soon as an element changes in the particular table. We can trigger a lambda function that sends SNS notifications to the user
DynamoDB streams capture a time-ordered sequence of item-level modifications made to a table. By using DynamoDB streams, a developer can enable real-time processing of table data, and trigger an action in response to any change made to the table.
In this scenario, the developer can set up a DynamoDB stream on the table and configure a Lambda function to be triggered by new stream records. The Lambda function can then process the data, and send a notification to users via SNS.
Using DynamoDB streams and Lambda function does not impact the provisioned throughput of the DynamoDB table, as the stream reads and Lambda function processing are performed asynchronously in the background.
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