How to change status of the above message to success status?

[Renunaren]

I have a message in my events like below

"Main function executed successfully."

I need to change status of the above message to Success status.

[batabay]

Also you can try this ; 

| eval status = if(match(_raw,"Main function executed successfully. "),"Success","No Sucess Message")

[yuanliu]

Do you mean to assign a value to a field named "status"?  Like

| eval status = if(match("Main function executed successfully", "Success", null())