# PartitionSpec
<a name="API_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.

## Contents
<a name="API_PartitionSpec_Contents"></a>

 ** Identity **   <a name="Firehose-Type-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.  
Type: Array of [PartitionField](API_PartitionField.md) objects  
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/firehose-2015-08-04/PartitionSpec) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/firehose-2015-08-04/PartitionSpec) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/firehose-2015-08-04/PartitionSpec)