execute

Hi every one, 

I'm trying to do the follow:

declare 

   aCad text[][]

begin

...

execute 'aCad:=aCad array[['||var1||','||var2||']]'

...

end; language plpgsql

but I get the follow error: 

sintax erro near to "aCad"

aCad := aCad || array[rCad.cmp,rSql.codfor]  

^

I guess I should not use "execute" besides of  insert, update, delete ...  but how could I do in this case ?

Thanks every one.

-- 
Grato,
Mauricio Cruz
Sygecom Informática
51 3442-3975 / 3442-2345