# StreamSpecificationProperty

Represents the DynamoDB Streams configuration for a table in DynamoDB .

You can only modify this value for a `AWS::DynamoDB::GlobalTable` resource configured for multi-Region eventual consistency (MREC, the default) if that resource contains only one entry in `Replicas` . You must specify a value for this property for a `AWS::DynamoDB::GlobalTable` resource configured for MREC with more than one entry in `Replicas` . For Multi-Region Strong Consistency (MRSC), Streams are not required and can be changed for existing tables.

- Source: Generated code
- Type last changed: v2.93.0 · 23 Aug 2023

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_dynamodb as dynamodb } from 'aws-cdk-lib';
const streamSpecificationProperty: dynamodb.CfnGlobalTable.StreamSpecificationProperty = {
  streamViewType: 'streamViewType',
};
```

## Properties

- `streamViewType`: string (required) — When an item in the table is modified, `StreamViewType` determines what information is written to the stream for this table.

  Valid values for `StreamViewType` are:

  - `KEYS_ONLY` - Only the key attributes of the modified item are written to the stream.
  - `NEW_IMAGE` - The entire item, as it appears after it was modified, is written to the stream.
  - `OLD_IMAGE` - The entire item, as it appeared before it was modified, is written to the stream.
  - `NEW_AND_OLD_IMAGES` - Both the new and the old item images of the item are written to the stream.