search for groups with a user

I have to search for which groups a certain user is in. I found out that the 
field grolist is of type INT[] (array of integers with reference to the 
uids). To search through the array I need a module which is in contrib/array, 
which I found, but how do I use it? What do I have to do to be able to do 
searches on arrays in the WHERE clause?

Saludos... :-)

-- 
Cualquier administra un NT.
Ese es el problema, que cualquier administre.
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Martin Marques                  |        mmarques@unl.edu.ar
Programador, Administrador      |       Centro de Telematica                      Universidad Nacional
        del Litoral
 
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