Using a DynamoDB CloudFormation resource in a SAM template to add range.

template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: DDB example

Resources:
  Table:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        - AttributeName: id
          AttributeType: S
        - AttributeName: timestamp
          AttributeType: S
      BillingMode: PAY_PER_REQUEST
      KeySchema:
        - AttributeName: id
          KeyType: HASH
        - AttributeName: timestamp
          KeyType: RANGE
      StreamSpecification:
        StreamViewType: NEW_AND_OLD_IMAGES