If you open the DataAssist Search Server Behaviour
You can see there is a default where clause option
The help docs say
Default WHERE clause: The default where clause used if the session variable is not set and the user has accessed the current page without passing the appropriate trigger to run the server behavior. Here are some examples for returning all or no records:To default to no records displayed:
WHERE 0 <> 0
To default to all records displayed:
WHERE 0 = 0
So although I have never personally used this option I would say that you could use it to achieve the result you are looking for
