How to determine which column "matched"

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I'm trying to figure out a way that SQL can pass a flag to PHP to say which column "matched" during a query.  

Let's say for instance that I want to search for the word "apple" in both column "producer", and column "designation".  I was hoping I could do something like this:


Select producer, flag=1 from wine
where producer like '%apple%'
UNION
Select designation, flag=2 from wine
where designation like '%apple%'



and then in each row that comes back, I could determine which column did that match by doing a PHP analysis of the "flag" value.  However, this doesn't appear to be the right way to go about this (mySQL doesn't like these flag=1, flag=2 things.  

Can someone help steer me in the right direction?

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