[Zope-DB] how to pass an argument into a Z SQL method without using a form?

[Robert Van Overmeiren]

Hello,

My question has to do with passing an argument into a Z SQL method without
having to use, or submit, a form.

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The SQL is like this:
SELECT GROUP_VALUE FROM APPUSER WHERE USERNAME = <dtml-sqlvar username
type=string>
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I want the current Zope user's name to be automatically inserted in place of
the username argument. Can "user/getUserName" be used here somewhere?

This SQL is called from a page template. If the Z SQL method can't request
and insert the Zope user value, then can it be requested and passed to the
SQL from the page template somehow?

Thx
Bob Van