select columns in full text index

[brian ally]

I have several tables which have some columns indexed for full text 
searching.

table 1:
FULLTEXT(foo,bar)

table 2
FULLTEXT(pip,pop,pup)

table 2:
FULLTEXT(hip,hop)

I'd like to be able to query the db to find which columns are indexed 
depending on the table to be searched so i can then create my MATCH(). 
I'm having a heck of a time googling for this.

Hope that's clear enough,
brian