dynamic queries

[dave]

I have something like   

    qset=db()
    if arg1 == "xyz": qset=qset(db.abc.id > 0)
    if arg2 == "abc": qset=qset(db.abc.age > 5)
    x = qset.select()
   

now I want to pass x to SQLFORM.grid something like this
return SQLFORM.grid(x)
but this does not work because qset.select returns all the rows with all the columns I think, I know that SQLFORM.grid accepts a table or a query so how can I pass x to it?

[dave]

   I solved this problem by using the code below, instead of using the above code, if anyone comes across this problem
   

queries=[]
if arg1 == "xyz": queries.append(db.abc.id > 0)
if arg2 == "abc": queries.append(db.abc.age > 5)
query = reduce(lambda a,b:(a&b),queries)

and you can insert this query into SQLFORM.grid(query)