# IcebergSortField
<a name="API_IcebergSortField"></a>

Defines a single field within an Iceberg sort order specification, including the source field, transformation, sort direction, and null value ordering.

## Contents
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 ** Direction **   <a name="Glue-Type-IcebergSortField-Direction"></a>
The sort direction for this field, either ascending or descending.  
Type: String  
Valid Values: `asc | desc`   
Required: Yes

 ** NullOrder **   <a name="Glue-Type-IcebergSortField-NullOrder"></a>
The ordering behavior for null values in this field, specifying whether nulls should appear first or last in the sort order.  
Type: String  
Valid Values: `nulls-first | nulls-last`   
Required: Yes

 ** SourceId **   <a name="Glue-Type-IcebergSortField-SourceId"></a>
The identifier of the source field from the table schema that this sort field is based on.  
Type: Integer  
Required: Yes

 ** Transform **   <a name="Glue-Type-IcebergSortField-Transform"></a>
The transformation function applied to the source field before sorting, such as identity, bucket, or truncate.  
Type: String  
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/glue-2017-03-31/IcebergSortField) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/glue-2017-03-31/IcebergSortField) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/glue-2017-03-31/IcebergSortField)