Simple SAM example with one DynamoDB table and one Lambda function

template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Resources:
  someTable:
    Type: 'AWS::DynamoDB::Table'
    Properties:
      AttributeDefinitions:
        - AttributeName: id
          AttributeType: S
        - AttributeName: version
          AttributeType: 'N'
      KeySchema:
        - AttributeName: id
          KeyType: HASH
        - AttributeName: version
          KeyType: RANGE
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5
      StreamSpecification:
        StreamViewType: NEW_AND_OLD_IMAGES
  someFunction:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: someFunction.handler
      Runtime: nodejs6.10
      CodeUri: .
      Policies: []
      Events:
        Tablet1:
          Type: DynamoDB
          Properties:
            Stream: !GetAtt someTable.StreamArn
            StartingPosition: TRIM_HORIZON
            BatchSize: 10