functionName

The name or ARN of the Lambda function.

Name formats

• Function name – MyFunction.

• Function ARN – arn:aws:lambda:us-west-2:123456789012:function:MyFunction.

• Version or Alias ARN – arn:aws:lambda:us-west-2:123456789012:function:MyFunction:PROD.

• Partial ARN – 123456789012:function:MyFunction.

The length constraint applies only to the full ARN. If you specify only the function name, it's limited to 64 characters in length.