[Zope] Second question ?=)

[Rudd-O]

This is my second question:

Id like to run a <dtml-in sqlquerymethod> with specific 
parameters to its namespace
This is the deal
I want to construct a dropdown list, with all values 
retrieved from a SQL stored procedure, so if I open the 
form with no variables, all of them appear, but if i 
submit the form to itself, the variable gets passed on 
to parameters, and the SQL query receives it because 
it's on its parameter list, and filters the query.  I 
don't want to alter the SQL query methods to fetch all 
data, but i'd like to override the values of its 
namespace so I can specify NULL and get all data, and 
in calling method compare each data in the <dtml in> 
loop to insert a selected property in the dropdown 
object that matches the existing variable.

Any pointers?

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