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# AWS::KinesisFirehose::DeliveryStream PartitionSpec
<a name="aws-properties-kinesisfirehose-deliverystream-partitionspec"></a>

Represents how to produce partition data for a table. Partition data is produced by transforming columns in a table. Each column transform is represented by a named `PartitionField`. 

Here is an example of the schema in JSON. 

 `"partitionSpec": { "identity": [ {"sourceName": "column1"}, {"sourceName": "column2"}, {"sourceName": "column3"} ] }` 

Amazon Data Firehose is in preview release and is subject to change.

## Syntax
<a name="aws-properties-kinesisfirehose-deliverystream-partitionspec-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-kinesisfirehose-deliverystream-partitionspec-syntax.json"></a>

```
{
  "[Identity](#cfn-kinesisfirehose-deliverystream-partitionspec-identity)" : {{[ PartitionField, ... ]}}
}
```

### YAML
<a name="aws-properties-kinesisfirehose-deliverystream-partitionspec-syntax.yaml"></a>

```
  [Identity](#cfn-kinesisfirehose-deliverystream-partitionspec-identity): {{
    - PartitionField}}
```

## Properties
<a name="aws-properties-kinesisfirehose-deliverystream-partitionspec-properties"></a>

`Identity`  <a name="cfn-kinesisfirehose-deliverystream-partitionspec-identity"></a>
 List of identity [transforms](https://iceberg.apache.org/spec/#partition-transforms) that performs an identity transformation. The transform takes the source value, and does not modify it. Result type is the source type.  
Amazon Data Firehose is in preview release and is subject to change.  
*Required*: No  
*Type*: Array of [PartitionField](aws-properties-kinesisfirehose-deliverystream-partitionfield.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)