# CopyValueEntry


This object defines one value to be copied with the [ copyValue](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/CloudWatch-Logs-Transformation.html#CloudWatch-Logs-Transformation-copoyValue) processor.

## Contents


 ** source **   <a name="CWL-Type-CopyValueEntry-source"></a>
The key to copy.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

 ** target **   <a name="CWL-Type-CopyValueEntry-target"></a>
The key of the field to copy the value to.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

 ** overwriteIfExists **   <a name="CWL-Type-CopyValueEntry-overwriteIfExists"></a>
Specifies whether to overwrite the value if the destination key already exists. If you omit this, the default is `false`.  
Type: Boolean  
Required: No

## See Also


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/logs-2014-03-28/CopyValueEntry) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/logs-2014-03-28/CopyValueEntry) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/logs-2014-03-28/CopyValueEntry)