# UpdateGrokClassifierRequest
<a name="API_UpdateGrokClassifierRequest"></a>

Specifies a grok classifier to update when passed to `UpdateClassifier`.

## Contents
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 ** Name **   <a name="Glue-Type-UpdateGrokClassifierRequest-Name"></a>
The name of the `GrokClassifier`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\t]*`   
Required: Yes

 ** Classification **   <a name="Glue-Type-UpdateGrokClassifierRequest-Classification"></a>
An identifier of the data format that the classifier matches, such as Twitter, JSON, Omniture logs, Amazon CloudWatch Logs, and so on.  
Type: String  
Required: No

 ** CustomPatterns **   <a name="Glue-Type-UpdateGrokClassifierRequest-CustomPatterns"></a>
Optional custom grok patterns used by this classifier.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 16000.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*`   
Required: No

 ** GrokPattern **   <a name="Glue-Type-UpdateGrokClassifierRequest-GrokPattern"></a>
The grok pattern used by this classifier.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.  
Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\t]*`   
Required: No

## 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/UpdateGrokClassifierRequest) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/glue-2017-03-31/UpdateGrokClassifierRequest) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/glue-2017-03-31/UpdateGrokClassifierRequest)