[Zope] complex question

[Jonothan Farr]

> I still prefer the single query method, however, as it allows the query
> to only run once, instead of several times in a loop.


Try this (untested):

SELECT object_id, attributes.attribute_id, attribute_name_string, object_id =
<dtml-sqlvar object_id type=string> AS checked
FROM objects , attributes
WHERE attributes.attribute_id = objects.attribute_id;

Use the 'checked' column to determine which items to check.

One problem is that this will only select attributes which are assigned to
some object, i.e. it will miss unassigned attributes. You could probably play
around with making this an outer join and correct that problem.

-jfarr

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