# SchemaField


Contains details about a schema field.

## Contents


 ** name **   <a name="AmazonS3-Type-s3Buckets_SchemaField-name"></a>
The name of the field.  
Type: String  
Required: Yes

 ** type **   <a name="AmazonS3-Type-s3Buckets_SchemaField-type"></a>
The field type. S3 Tables supports all Apache Iceberg primitive types. For more information, see the [Apache Iceberg documentation](https://iceberg.apache.org/spec/#primitive-types).  
Type: String  
Required: Yes

 ** id **   <a name="AmazonS3-Type-s3Buckets_SchemaField-id"></a>
An optional unique identifier for the schema field. Field IDs are used by Apache Iceberg to track schema evolution and maintain compatibility across schema changes. If not specified, S3 Tables automatically assigns field IDs.  
Type: Integer  
Required: No

 ** required **   <a name="AmazonS3-Type-s3Buckets_SchemaField-required"></a>
A Boolean value that specifies whether values are required for each row in this field. By default, this is `false` and null values are allowed in the field. If this is `true` the field does not allow null values.  
Type: Boolean  
Required: No

## See Also


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/s3tables-2018-05-10/SchemaField) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/s3tables-2018-05-10/SchemaField) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/s3tables-2018-05-10/SchemaField)