Enable dynamodb stream for an existing dynamodb table

Question

Hi,

I would like to enable dynamodb stream on an existing  dynamodb table using cloudformation template.

I searched but could not find anything in this regard. I see there is way to enable dynamodb stream for an existing table using console but couldn't find any way to achieve same using cloudformation template.
Can you help with this .

Answer

Hi, 
For this you can simply add the [StreamSpecification](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-dynamodb-table.html#cfn-dynamodb-table-streamspecification) parameter to your table and update the stack:
```
"StreamSpecification": {
          "StreamViewType": "NEW_AND_OLD_IMAGES"
        }
```

A sample table with Stream included:
```
{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
    "myDynamoDBTable": {
      "Type": "AWS::DynamoDB::Table",
      "Properties": {
        "AttributeDefinitions": [
          {
            "AttributeName": "id",
            "AttributeType": "S"
          }, 
          {
            "AttributeName": "name",
            "AttributeType": "S"
          }
        ],
        "KeySchema": [
          {
            "AttributeName": "id",
            "KeyType": "HASH"
          }
        ],
        "BillingMode": "PAY_PER_REQUEST",
        "TableName": "testcfn",
        "StreamSpecification": {
          "StreamViewType": "NEW_AND_OLD_IMAGES"
        }
      }
    }
  }
}
```

Answer

Hi Leeroy Hannigan , 
As per the link you shared , for importing the existing resources into CloudFormation management: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resource-import.html,
It doesn't seem to explain an option to import through **CDK ** . how can we achieve that through CDK?
In my case here,
 I created a new pipeline app, stack through CDK for an account thats holding manually created DDB Tables. i would want to import existing DDB tables that were created manually on console and enable stream on these tables. could you please guide me here?

Enable dynamodb stream for an existing dynamodb table

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