Parameter To Pull 'All' On Int Field

I've created a parameter in my report that gives a list of incident #'s which are in the int format. I've always used a Union Select 'All' to allow the user to pull up one item or all items. In this case, I can't get it to work because of the formatting difference.

Here is the code for the dataset called Incident that I'm using for the parameter:




Code Block
Select Incident
from Table
Union Select ' All'
order by 1





This is in the where clause of the main dataset:




Code Block( Incident = @Incident and @Incident<> ' All'
or Incident <> @Incident and @Incident = ' All')



I have this working on a bunch of reports but this is the first time I've tried to use this theory on an integer field. Any ideas?