How to pass a different search query based on the token value from a text field

I have a text field with default/initial value set to "*". I wanted to use different search queries based on the values from the textfield which is mainly "*" or not "*". Any suggestion? Thanks.

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| makeresults | eval nonstar="$tok_text$" | stats values(nostar)-15m@mnow| makeresults | eval star="$tok_text$" | stats values(star)-1d@dnow